Plastic caisson for a well: design features and varieties. Option #3 – plastic caisson. Video: Installing a metal caisson

The problem of supplying water to private houses located far from the centralized infrastructure was solved by installing wells, installing pumping equipment and connecting pipes to the house. As a result, the home owner receives full-fledged running water. A well, as a source of water, must be well protected from various negative impacts. Why is a special device installed at its mouth - a caisson.

Caisson is sealed cylindrical design, made of concrete, plastic, metal, approximately two meters deep. At the bottom of the cylinder is the base of the well. The caisson must be installed with a hatch for normal access to the well.

Main types, functions and purpose

To provide efficient work water supply using a well, it is necessary to provide for every detail. For example, it is no secret that when the temperature drops to zero degrees, the water becomes covered with ice. Usually underground water horizons are below the soil freezing line, but the pump is located on the surface and is highly susceptible to negative temperatures. From low temperature the water in the pump freezes, pipes burst, pumping equipment breaks down, and the water supply system fails.

To prevent this, a caisson is installed. This is insulated equipment big size, having a cover with thermal insulation. The following equipment is located inside the caisson:

• Filters.
• Pump.
• Pressure gauge.
• Shut-off valves.
• Expansion tank.
• Automation.

The only case where a caisson is not installed is when the well is located close to a heated building. In this case there is free access to any system nodes, but at the same time there is a high noise level.

When constructing a well, the water supply pipe is located in a caisson at a depth of several meters. This depth of the water pipe creates reliable protection when the temperature drops. Additionally, you can install a pipe that is used for watering the garden. The pipe is located on the very surface of the earth.

Main functions

The caisson has the following functions:

Differences in material and shape

The shape of the device is very different: round, square, rectangular. Caissons are made from iron concrete rings, metal or plastic.

Devices from concrete rings, bricks, concrete They are quite cheap and durable, but without expensive waterproofing they cannot protect the well from the action of groundwater. Another thing is steel or plastic models.

Steel caisson - advantages and disadvantages

A steel model is a round or square capacity. As a rule, devices of this type are made with a narrow neck, the so-called manhole with a lid. They put a steel caisson on the water pipe, weld it securely to it and dig it in. As a result, there is only a hatch on the surface, protruding by 10–15 cm.

Steel models are painted both outside and inside to protect against corrosion. In addition, the device is insulated with a coating or adhesive material. The steel caisson is covered with a lid or hatch. The covers are attached to hinges and also have locking eyes.

To increase the tightness of the connection between the device and the water pipe, manufacturers weld a special sleeve into the equipment - part of a pipe with a larger cross-section. Yes, during installation you can get by with just one weld seam. To provide the best protection against freezing, the steel caisson must have a height of at least 2 meters, and at the same time have insulation for the lid and working chamber. The cost of steel models depends on their height and width.

Advantages: easy access to the pump, good protection from foreign penetration, strength, easy installation and low cost.

Flaws: the presence of welding joints, the likelihood of corrosion, the need for thermal insulation.

Plastic caissons - price, main advantages, difference from steel caisson

It is plastic models that are considered the most popular type of this equipment today. They are made of plastic approximately two centimeters thick. Shape, color plastic device can be very different. Price plastic models mainly depends on the volume.

Advantages:

• Good waterproofing, as the container is completely sealed.
• Light weight - installation can be done with your own hands, without the use of special equipment.
• Quite low cost.
• Excellent thermal insulation: plastic caisson, unlike steel structure, does not require additional thermal insulation. The temperature inside the container is constantly approximately plus 5 degrees.
• Durability: Unlike steel, plastic lasts much longer and does not corrode.

Experts indicate that for plastic models only one drawback is low rigidity, which sometimes leads to tank deformation. But the solution to this problem is very simple. Mounting plastic tank, instead of backfilling the soil, a layer of concrete mortar is poured around the entire perimeter.

DIY device and installation

It is quite possible to make a caisson with your own hands. It is advisable to choose metal as the material. For work you will need: a hacksaw, a metal sheet 5 millimeters thick, a welding machine.

First we make a cylinder with a diameter of a meter and a height of 2 meters. The next step is to weld the bottom to the cylinder. Do not forget that seams must be sealed. In part of the bottom you first need to make a hole for the sleeve. The diameter of the sleeve must be slightly larger than the diameter of the water pipe.

We make a hole in the container for the cable, for various types of pipes, which include the pumping equipment that will be installed.

The final stage is coloring. Paint the inside of the container, and we fix bitumen on the outside.

Installation occurs in the following way:

Summarizing

Installing a caisson simultaneously solves many problems. The water supply at home immediately becomes safer; owners do not have to worry about being without water when frost sets in. At the dacha, this device can be used as a warehouse or cellar, equipping it with a reliable lock.

Now you can buy a durable, ready-made plastic or metal caisson, or make it yourself. The choice is up to you. The main thing is not to forget that without this equipment normal operation wells is simply impossible.

For water supply country house wells located on the site are often used. After installing all the necessary equipment, an autonomous plumbing system. Since the well is the main and often the only source of water, it must be effectively protected from external negative factors. To do this, a caisson is installed at its outlet. If you look carefully at what a caisson is, you can note its similarity to a barrel or other similar container.

A caisson is a sealed container made of plastic, metal or concrete. Its depth is about two meters, and at the bottom there is the wellhead. There is a hatch on the top that provides free access to the equipment located inside.

Such a sealed container is required to ensure trouble-free operation of the autonomous water supply system all year round. In the warm season, the well must be protected from surface waters. During melting snow or heavy rainfall, water can seep down the outer wall of the pipe into the aquifer, polluting it. Having a sealed container around the wellhead prevents this from happening.

In addition to surface water, there are other negative factors from which the well must be protected. The most important thing is the low temperature in winter time. Aquifers are located well below the soil freezing level, but the outlet well, pumping equipment and water pipes. The caisson helps prevent the system from freezing. It is completely immersed in the ground, so its lower part extends beyond the soil freezing line. For better heat retention, the walls and hatch are insulated.

Everything is placed inside the caisson necessary equipment. It may include the following elements: pump and expansion tank, pressure gauges, filters, automation and shut-off valves. An airtight container will protect them not only from frost, but also from debris and contamination. This arrangement makes maintenance easier. All elements of the system will be available even after heavy snowfalls.

Shape and materials of caissons

The shape of the caissons can be very different. Most common round options, optimal in volume and strength. But there are also square and rectangular products.

They make concrete, steel and plastic. Brick and concrete options relatively cheap and easy to install, but require careful waterproofing with high-quality materials. If this is not done, surface water will seep in, which will lead to equipment damage. Plastic and metal models are more reliable and easy to use.

Pros and cons of metal caissons

A metal caisson is a round or rectangular container with a neck narrower than the main part and a lid. This container is placed on the protruding well pipe and connected by welding. Pre-dug pit required sizes. Once the caisson is buried, only the hatch remains visible. It protrudes from the ground by about fifteen or twenty centimeters.

To protect metal from corrosion, external and internal surfaces painted with special paint. For additional protection use coating waterproofing.

Since metal conducts heat well, the height of the caisson should be at least two meters. The top part and the lid are additionally insulated.

The advantage of a metal container is its high strength. Such a caisson can also be used on moving soils. Provides convenient access to equipment. When installing the container, no complicated steps are required. The price of metal caissons is not high, but depends on the size and anti-corrosion treatment.

The downside is the significant weight of such a product. Installation requires special equipment.

Plastic models: pros and features

They are the most common version of this type of equipment. The wall thickness is about two centimeters, which, combined with ductility and strength, provides a reliable result.

Among the advantages of such equipment, low prices and light weight. Since the container is lightweight, it can be easily lifted and installed by yourself. In this case, special equipment is not required.

Plastic is not destroyed by corrosion, therefore it is the most durable. It provides a high level of thermal insulation so there is no need for additional insulation. The container is sealed and does not require additional waterproofing.

On to the cons plastic options attribute only some fragility. If the loads are very high, the walls may crack. Correct installation helps eliminate soil pressure.

If you decide to install a caisson, it is important to find out what it is. Initially, this element was used for underwater work; it looked like a camera that had a square or round shape. The main feature was the quality of waterproofness.

Description of the caisson

In order to achieve permanent job systems, it is necessary to take into account the climate and think through everything to the smallest detail. When the temperature external environment falls below zero, water has the ability to freeze. The underground horizons are located below the freezing level, while the pumping equipment is located on the surface, this indicates that the liquid will freeze at the first frost. This will cause the pump to immediately become unusable, the pipes will rupture and the system will fail. A caisson will help eliminate these problems. You can find out what it is by reading this article.

The mentioned well element is a large thermally insulated container, which is equipped with a lid. The latter is also insulated. The necessary equipment is located inside. Among other things, you can install a pump inside, as well as shut-off valves, automation, filters, and measuring instruments. It is possible to deprive a well of a caisson only if it is located close to a heated building or any similar structure. This option is more convenient, because in this case you will have access to all nodes of the system. However, this technology also has its disadvantages. They are that the equipment requires a sufficiently large free space, the second disadvantage is that the equipment operates quite noisily.

Description of the plastic caisson

If you decide to choose a plastic caisson, you can find out what it is below. Such designs can have a rectangular, square or round shape. They found greatest distribution among consumers. This is due to the low price, low weight, long life span, excellent thermal insulation qualities, as well as waterproofing. If we compare the cost, then plastic analogues cost significantly less compared to reinforced concrete and steel. Low weight simplifies loading and unloading operations, as well as installation manipulations. Plastic does not corrode at all and does not require additional insulation. The temperature inside the tank always remains within +5 degrees, which prevents water from freezing. If you decide to choose a plastic caisson, it is important to know what it is. Some disadvantages should also be taken into account similar designs. They are expressed in insufficient rigidity, this can cause changes linear dimensions containers, this may result in equipment failure. This problem can be solved quite simply; for this it will be necessary to backfill around the perimeter using cement mortar, for this it will be enough to provide a layer whose thickness is 80 millimeters.

Metal caisson

You can make a steel caisson with your own hands. However, such options are also sold in relevant stores. The outside of the structure will need to be treated with an anti-corrosion compound, and the material can be used metal, the thickness of which is 4 millimeters. Often enough ready-made models are made from of stainless steel, this guarantees a long lifespan. However, it is necessary to take into account that a caisson of this type will cost more than its analogues.

Caisson made of reinforced concrete rings

You can install a caisson made of reinforced concrete rings. Such products have recently been used less and less, this can be explained high cost, heavy weight and poor waterproofing. The significant mass complicates the transportation process and also implies the need to rent lifting equipment, which entails additional expenses. As for poor waterproofing, due to the hygroscopicity of the material, you will need to take measures to insulate the rings. In severe frosts, the water in the pump and shut-off valves may freeze. Thus, the reinforced concrete caisson does not always fulfill its main function. Among other things, it exerts an impressive load on the ground; over the years, the structure sags, which contributes to the deformation of the pipeline system.

Caisson installation

If you install a caisson, you must follow some rules. As for the work, it is necessary to begin with the preparation of the pit. It is important to take into account that its diameter should be slightly larger than the caisson itself - by 30 cm. The depth should be calculated so that the neck of the tank is 15 cm above the ground surface. This will prevent surface water that forms during melting from getting inside snow and during precipitation. At the next stage, a hole is made for which it will be located in the bottom. It can be oriented in the central part or shifted in any direction. The plastic caisson is installed according to the same principle. At the next stage, you need to weld a pipe sleeve to the hole, the diameter of which should be greater than the diameter of the casing pipe. The length of the sleeve can vary from 10 to 15 cm. You need to make sure that the sleeve fits easily onto the pipe.

Conclusion

If you install a caisson for a well yourself, then it may need to be mounted in such a way that the neck of the casing pipe moves towards the wall of the tank. This will allow you to position the container without restricting access to the well. Once you have learned what a caisson for a well is, you can purchase equipment and think about installing it. It is important to provide the caisson with all necessary qualities, including thermal insulation and protection from sewage. Only in this case will you be supplied with clean water, which will not freeze even in the harshest winters.

Conventional city water supply through centralized system not often available in a country house setting. It is necessary to create individual water intake devices. However, using them is associated with certain difficulties. One of the obstacles is climatic operating conditions, which create the need to protect equipment from freezing in winter. It is also important to prevent the intervention of vandals.

What is a caisson for a well

Any water intake device on the site must be protected from the external environment. These are covers for the well various designs. But when it comes to a caisson, it is clear that the well becomes the object of attention. A caisson is a depression in the ground designed to protect the expensive equipment and instruments located there from greedy profiteers. In addition, the caisson filling must be protected from frost and seasonal soil movements.

The well head with an external pump installed on it or a water intake pipe from a submersible unit is brought into the caisson. In addition, a distribution unit with wiring for various networks water supply and automatic water supply control. There may also be an expansion valve here. membrane tank. Negative temperatures can quickly disable all this equipment if the caisson is not constructed according to the rules.

A reliable caisson not only preserves the equipment, but also allows it to be conveniently maintained

This structure is buried in the ground below the freezing point. It is usually located at a depth of 1–2 meters, depending on the climatic conditions in the region. Therefore, the bottom of the caisson must be placed on the appropriate recess. The caisson is also designed to protect the equipment from the destructive effects of water from the surrounding soil, so it must be absolutely sealed.

Types of caissons

Basically, the classification of these structures occurs in accordance with the material from which they are made. There are such caissons:

1. Brick, lined with sand-lime brick or aerated concrete blocks. The binding solution must also be endowed with hydrophobic properties. The base is concrete, poured before laying.
2. Cast concrete buildings built on a concrete base, poured separately.
3. Caissons made of concrete rings. The main requirements for them are reliable waterproofing. They are also installed on a concrete base.
4. Plastic coffered chambers. They are completely sealed, do not weigh much and can have different sizes. Installation of such caissons is carried out in specially dug pits. The danger is that during spring floods it can simply be squeezed out of the ground. To prevent this from happening, the caisson is attached to an anchored concrete slab or installed on top of the ground. But in this case, you need to additionally insulate its body.
5. Metal. Such caissons have rectangular shape and are made from sheet metal and sectional profiles, as well as from pipes large diameter, which are easy to find on the secondary market.

All caissons are equipped with an entrance hatch to allow entry inside and carry out repair and maintenance work.

In most cases, the caisson is immersed in the ground and attached to a concrete slab, which keeps it from being pushed out of the ground by frost heaving forces.

The sizes of caissons are:

1. Small, with internal dimensions from 90 centimeters. The entrance hole on them should be from 60 centimeters. In such devices only a pump can be placed.
2. Medium - up to 1.8 meters, they make it quite convenient to carry out repair and maintenance work.
3. Large - up to 2.5 meters, allowing you to place equipment that controls the water supply, freeing the residential building from noise pumping station and other inconveniences.

Photo gallery: various types of caissons for wells

Caisson device

The depth of the container must exceed the freezing level of the soil. The caisson is placed on a drainage cushion of sand and gravel located at the bottom of the pit. Its width should be approximately half a meter larger than the size of the container so that it is possible to arrange an outer shock-absorbing layer. This installation is typical for metal or concrete caissons. Other types require a concrete base slab.

The end of the casing extends inside the caisson, on which the well head is placed with a water intake pipe coming out of it at submersible pump or outdoor centrifugal pump. In addition, there may be:

1. Well water filtration equipment.
2. Expansion membrane tank.
3. Control system for the operation of the pump and other equipment.
4. Shut-off valves and pipeline entry system.
5. An air outlet tube designed to release moist air from the caisson. This prevents condensation from forming inside the device.

The caisson is placed in such a way that the exit of the casing pipe is located approximately in the middle of the radius - between the center and the wall. This arrangement allows you to create the most convenient conditions for servicing the equipment.

Brackets are installed on the wall of the caisson for descending into it and exiting out.

If the caisson is of sufficient size, it can accommodate all the automatic water supply control

Main functions of the caisson

The main purpose of the caisson is to protect equipment from freezing. The air rising from foundation slab or the bottom, located below the freezing depth of the soil, has a positive temperature and protects the internal space from freezing.

As for the second function of the caisson - security - it is ensured by the reliability of the locks at the entrance.

Brick caisson for well

Brickwork of a caisson is perhaps the most common method of constructing a container. To complete this job you will need the following tools:

Table: tools for making a brick caisson

To complete the work you will need materials:

In addition to the above, you will need material for the formwork of the casing hole, which can be made from scrap materials.

Preparing to install a brick caisson

Preparatory activities consist of digging a pit for installing or manufacturing a container. The contours are marked taking into account the exit of the casing pipe in a certain place. It should be taken into account that a gap of 25–30 centimeters is needed between the walls of the caisson and the ground for backfilling with expanded clay.

Step-by-step instructions for making a brick caisson

The manufacture of a brick caisson is carried out in the following order:

1. Backfilling the drainage layer with sand and gravel alternately. Each layer must be compacted and watered to compact it.
2. Installation of formwork along the contour of the slab and in the opening for the exit of the casing. Thickness base plate should be about 25 centimeters.

   Formwork for concrete slab going from edged boards and secured with spacers and ties

3. Installation of fittings. For this design, it is enough to lay the reinforcing mesh in one layer.
4. Pouring concrete. Concrete grade 200 is used. Further work You can continue after at least 7 days.
5. Laying half brick walls. Preferably use silicate material or gas-filled blocks.

   It is better to use white sand-lime brick to construct a caisson.

6. Waterproofing device. You can use it for bitumen mastic, applied in two layers.
7. Backfilling with expanded clay. The material used is a fraction of 5–10 millimeters.

   Expanded clay is poured behind the outer wall of the caisson to form a reliable heat-insulating layer that protects the working space from freezing

8. Installation of floor slab.
9. Installation of the entrance hatch.
10. Removal of excavated soil and land reclamation.

Video: homemade pit (caisson) for a well

Concrete caisson for well

We take the same dimensions of the device - depth 2 m with overall dimensions 2.5 m. To cast a caisson from concrete, you will need the following tools:

Table: tools for casting a caisson

You will also need a tool to apply waterproofing to the outside of the cast housing.

Materials for caisson

We calculate the volume of concrete that will be needed to cast a solid caisson body. A sufficient wall thickness will be 20 centimeters. Concrete grade 200 is used. The area of ​​the walls is 2.7x2 + 2.5x2 = 10.4 m2, the volume at a height of 1.8 meters will be: 10.4 x 1.8 x 0.2 = 3.74 m3.

For the manufacture of high formwork It is better to use sheet materials: waterproof plywood or metal sheet. The area of ​​the high formwork is 2.7 x 4 x 1.8 = 19.44 m2 on the outer wall and 2.5 x 4 x 1.8 = 18 m2 on the inner wall. total area- 37.4 m2. Based on this, you need to purchase materials, taking into account their cutting ability.

To assemble the formwork you will also need wooden blocks 50x50 millimeters in the amount of 12 pieces. The length of each rack is 2 meters, that is, you will need 3 six-meter bars. Jib bars and spacers can be made from available material.

The procedure for preparing for pouring a concrete body is the same as described above.

Step-by-step instructions for casting a concrete caisson body

For manufacturing, you need to perform a number of sequential operations:

During the pouring process, it is necessary to install embedded parts for the exit of water supply pipes and power cables.

Video: how to make a concrete pit for a hydraulic accumulator

Metal caissons

The most popular are caissons made of metal of two types:

• rectangular in shape without a sheet metal frame;
• round, made of large diameter pipes with a welded bottom and a sheet steel roof.

The general rule for any type of caissons is to install a drainage cushion under them and fill the gap with expanded clay.

Rectangular metal caissons

Rectangular metal caissons are assembled from sheet steel 3–4 millimeters thick using electric welding. Assembly, as a rule, is carried out at the top by alternately welding the sheets to each other at right angles. The body is reinforced with stiffening ribs, which can be made from varietal profiles - channel, angle or tee. The distance between the ribs should be within 0.5–0.7 meters, and they should be installed vertically.

When assembling a caisson, metal sheets are welded to each other and then reinforced with stiffeners

Calculation of metal requirements for a rectangular caisson

Considering that the metal sheet has its own standard sizes, it is advisable to use roll material 3 millimeters thick and 2 meters wide. Cutting it to length in a metal warehouse of 2.5 meters in size will not be difficult and will not cost much. In order not to incur additional costs, it is better to settle on a caisson size of 2x2.5x2 meters. In this case, you will need 6 parts with dimensions:

• 2.0x2.5 m - 4 pieces;
• 2.0x2.0 m - 2 pieces.

total area sheet material will be: 2 x 2.5 x 4 + 2 x 2 x 2 = 20 + 8 = 28 m2. The weight of a square meter of sheet of this thickness is 23.56 kg. Thus, the total weight of the caisson body will be 28 x 23.56 = 660 kg.

One linear meter of a neck pipe measuring 630x12 millimeters weighs 183 kg; if the height of the neck is taken to be 60 cm, its weight will be 183 x 0.6 = 110 kg.

Thus, total weight the caisson will be 770 kg.

Tools for making metal caisson

To assemble a device from a metal sheet, you will need the following tools:

Table: tools for making a caisson

A mandatory operation when assembling the caisson is to check the welds for leaks. Kerosene and chalk are used for this. The control procedure is as follows:

1. Chalk the seam from the welding side.
2. Apply kerosene to the back side using a brush.
3. In places where the solidity of the seam is broken, yellowish, clearly visible spots will appear on the chalk layer.

At these points, the seam must be re-welded and checked again in the same way. Welding of the caisson can only be performed efficiently by a highly qualified welder.

Such a structure can only be lowered into a pit using lifting equipment. But before that, the following steps must be taken:

Step-by-step instructions for making a metal caisson

You can make a caisson from a sheet using the following technology:

1. Prepare a flat area for assembly, install a slipway, the plane of which should be oriented strictly horizontally.
2. Place the sheet bottom on it.
3. Secure the second sheet for the side wall with clamps at right angles to the bottom one. Additionally, secure it with temporary jibs.
4. Boil the seam and remove scale.
5. Install the second side wall sheet in the same way, then the end parts.
6. Check welds for leaks; if necessary, re-boil leaking areas.
7. Weld a rod with a diameter of 6–10 millimeters along the contour of the upper opening at a distance of 5 millimeters from the edge. This framing is necessary so that the top sheet has a support point and can be cooked from the outside. Welding in an unventilated, enclosed space is extremely dangerous.
8. On the top sheet, cut a hole for the neck, then lay it on the frame and weld it.
9. Replace the neck and weld.
10. Install the cover. For all structures, the lid and neck must be insulated with roll insulation.

Manufacturing a caisson from a large diameter pipe

Metal pipes can have a diameter from 420 to 2520 mm. It is the latter option that is very suitable for making a caisson. Preference may be given to this method for the following reasons:

Obviously, the labor costs and cost of such material will be significantly lower than for all the others listed above.

Video: installing a caisson manually

The task of covering the caisson equipment in technical and technological terms does not represent complex problem. All work can easily be done with your own hands, and qualified specialists can be invited to perform special operations, such as welding and installing the caisson in place. The rest is more labor-intensive than difficult. I wish you success!

For some people central water supply is a pipe dream, others prefer to drink and use well water for cooking. Whatever the reason for using groundwater in your case, if you have a well, and you want to use artesian water all year round, you will have to install a caisson or a well adapter.

The efficiency of a well largely depends on the correctness of its arrangement, and the selection and installation of a caisson plays an important role here. Its main task is to protect the trunk and bottom from external influences (dirt, water from the surface), facilitating maintenance at any time of the year.

Based on your professional experience, I strongly recommend not saving on the arrangement of the caisson if you plan year-round operation of the hydraulic structure.

Selecting a caisson - description, types, device

Previously, a caisson was used when performing work under water. Such a structure was round or square, and, of course, waterproof. The caisson used to construct the well has the same properties, and the shape has not changed. In appearance, this container resembles a box or barrel with a neck, the entrance to which is closed by an insulated hatch.

For this device, tightness is very important, because the casing pipe of an artesian well is cut at a depth of about 2 m, where groundwater is often located, which is not distinguished by its purity. Therefore, the entrance of the casing pipe into the container is also thoroughly sealed. When the caisson and casing are metal, their connection is made by welding.

Caissons can be not only different shapes- They also differ in size. You can find huge containers, but more often round caissons with a diameter of 1 m and a height of 2 m are used. If everything is clear with height, then being in a container with a diameter of only 1 m, even a thin person will feel uncomfortable.

What explains the popularity of narrow septic tanks? The answer is not difficult to find - the cost of such a product is the lowest. If you plan to install pumping equipment inside the product, then you need to purchase a larger caisson.

PLASTIC CAISON EUROLOS

Eurolos caissons, made of monolithic polypropylene, are usually used in the construction of shallow wells that are drilled into sand, and casing columns made of plastic or PVC are installed in them.

A plastic container is slightly more expensive than a metal one, but due to the fact that its guaranteed service life is at least 40 years, it does not require regular maintenance. Maintenance. The container is resistant to low temperatures, and does not freeze as much as metal or concrete, so the cost of insulation will be insignificant.

Acquisition plastic product is fully justified throughout its long service life, and installation does not require the use of special equipment.

Any of the Eurolos caissons can be purchased from us, and if necessary, our specialists will do everything installation work, including connecting pumping equipment, laying and connecting water supply.

Types and cost of caissons Eurolos

Among the Eurolos caissons there are the following modifications:

Depending on the existing conditions and needs, it is possible to choose the appropriate Eurolos caisson.

Equipment at work

Types of caissons - their pros and cons

I can distinguish the following types of caissons:

• Plastic– lightweight designs that differ at an affordable price, ease of installation, but they cannot be used everywhere. High groundwater can push such a caisson to the surface. There is also a risk that the bottom or walls will not withstand soil movement

Concrete rings found wide application in the manufacture of various tanks, containers and wells. They are also used in the manufacture of caissons, but with an unprofessional approach to the preparation and installation of rings, problems often arise related to penetration groundwater inside the structure.

The difficulties arise from the fact that casing pipe It is not possible to press tightly, and leaks occur between the bottom and the ring, and even between the rings themselves due to an incorrectly selected composition.

If the need arises, you can drill a hole in such a caisson and add a drainage system. When our craftsmen carry out the work, no problems arise, as evidenced by the caissons made of reinforced concrete that we have manufactured and have served for several years.

• Steel– heavy, durable caissons. They are supplied ready for installation, complete with hatches and service openings. In my opinion - quite convenient, universal solution. A high-quality caisson is made of metal with a thickness of at least 4 mm. To prevent corrosion from corroding the metal, outer part The container is coated with bitumen, which acts as an anti-corrosion coating, and the inside is painted with a primer.

• Brick, monolithic (homemade)– their only advantage is arbitrary sizes. Otherwise, I see this as a long, difficult and unreasonably expensive task, which, oddly enough, is carried out by those who want to save money. I’ll say right away that the savings are imaginary, since in reality the costs are much higher than expected
• Using a downhole adapter.

Relatively recently, equipment called a downhole adapter appeared. Its advantage is that you can do without digging a hole and subsequent installation of an expensive caisson, and the device itself is inexpensive, but there are also some disadvantages.

• All other equipment will be installed in the basement or indoors.
• Through casing will not work execute connection of an additional water supply branch. In this case, you will have to dig up a previously laid pipe and make a branch from it.
• Old pump may not fit into the casing.
• The adapter will not support the mass of pipes and a heavy pump if the water lies at great depths.

Which caisson to choose is up to you, but I recommend being guided primarily by the geological and hydrogeological features of your site. In the Moscow region, our specialists are well acquainted with the characteristics of soils in various areas, therefore, in accordance with your needs, we will quickly select the most effective solution for you.

INSTALLATION OF WELL ADAPTER

The end of the casing is located above ground level.

• At a depth of about 2 m, the adapter is inserted.
• The main part of the downhole adapter is being installed.
• The water pipe is connected, walking towards the house.
• The second part of the adapter is connected to the submersible pump hose.
• The pump is lowered into the casing, inside which the adapter parts are connected.

If you want the caisson or well adapter to be properly assembled and installed, then contact us, because our specialists do the work efficiently and with a guarantee.

We install a septic tank in Moscow

HOW MUCH IS THE CAISON AND ITS EQUIPMENT?

CONSTRUCTION OF A CAISON - HOW TO DO IT RIGHT?

When arranging a caisson, I advise rely on the following principles, based on the tasks that he must solve:

• It is necessary to achieve complete tightness of the caisson- that is, even if water somehow gets into it from the surface, it should not get into the wellbore or behind the casing. For this purpose, a completely sealed head is installed on it.
• The temperature in it should always be positive, to prevent the water in the system from freezing, for this it must be located at a certain depth (depending on its type), and, if necessary, additionally insulated.
• It must be resistant to moisture– for this purpose, concrete is treated with waterproofing compounds, and metal caissons are coated with anti-corrosion materials even in production conditions.
• It should provide convenient access to system elements autonomous water supply - for this you need enough free space internal space, arrangement of a convenient hatch.

Well drilling cost calculation

Select your region: Solnechnogorsk District Istra District Dmitrovsky District Odintsovo District Krasnogorsk District Klinsky District Narofominsk District

HDPE casing pipe UPVC pipe 129 mm

Filter: For HDPE (stainless steel). For uPVC (slotted with spraying).

Approximate price: - rub.
IMPORTANT! We are the only company that drills for “not deep sands” in this area

Caisson in a well with a high water level - which one to choose?

If we're talking about O high level groundwater, then I recommend abandoning the plastic caisson, as there is a risk that it will be pushed to the surface or bottom deformations will occur. The presence of plastic stiffeners will not save you from these problems.

I also see the choice of a heavy concrete structure, which can sag, as unsuccessful. I advise you to give preference to a polymer sand or metal caisson on a concrete pad. At optimal weight and correct processing any of these options will serve for a long time, reliably protecting the well from high water.

Sealing a concrete caisson - how to do it?

It is necessary to think about sealing the concrete caisson even before installation begins. When using concrete rings I recommend holding the following activities:

• Treat the rings with penetrating waterproofing– the depth of its penetration is up to 35-40 cm, so it does not matter which side you treat them on – the main thing is to follow the rules and recommendations of the manufacturer of the waterproofing mixture
• For masonry, I strongly recommend using a moisture-resistant mortar- can be mixed cement-sand mixture on liquid glass or immediately use special moisture-resistant building mixtures
• Use adapters and special couplings to seal process holes for pipes and wires
• Don't skimp on the hatch– order completely sealed models with rubber seals

I have been convinced in practice more than once that these measures will help avoid problems during operation.

From my own experience I can say that one does not interfere with the other, but does it make sense to abandon the head and caisson in favor of an adapter? Definitely no! I'll explain why.

It makes sense to install an adapter only when the static water level in the well is very high - above the freezing point of the soil. This is rare in the Moscow region, but this option is not excluded.

In this case, there is a need to forcibly lower this level, for which an adapter is installed in the pit, and a plug is mounted on top of the casing pipe itself.

Many people decide that there is no need to install a caisson and simply fill the well with earth.What happens when there is a need to service or replace the pump is easy to guess.

At the same time, the head is not always able to withstand water pressure, so if the water level is high, installing an adapter is necessary. And I recommend installing it in a caisson.

Water pressure on the bottom of the caisson - how to solve the problem?

The pressure of high groundwater on the bottom of the caisson can lead to its being pushed to the surface if its mass is not large enough. Its deformation is also possible. This phenomenon is most dangerous for light plastic caissons.

If it is already installed, then you can try to make it heavier by pouring a concrete pad on the bottom, but this measure may turn out to be a waste of money and time, since the plastic may simply crack. If the bottom is curved, then concrete screed will help create a flat plane for mounting equipment.

Concrete caisson with a double bottom - what is its feature?

Such caissons are installed to protect against flooding during heavy rainfall or snow melting, if the automation is supposed to be installed in the caisson, which I do not recommend doing. The meaning of the second bottom is to create a “basement” in the caisson, a kind of sump in which a drainage pump and a float are installed.

If the caisson is flooded, the water does not flood the equipment, but goes into the “basement”, from where it is pumped out by a drainage pump.I consider this precautionary measure to be relevant only in regions with high flood risks, heavy rainfall, and also in high static level water in the well itself.

And only on the condition that the automation is mounted in a caisson. I recommend installing it in the basement of the house, so that even if the caisson is flooded, it will not be damaged, then you won’t have to take such precautions. Especially if the caisson is equipped correctly and is completely sealed.

Waterproofing a concrete well caisson - is it necessary?

Definitely yes. Concrete is a porous material that is highly absorbent. Prolonged contact with moisture leads to a decrease in its level of strength, the formation of mold and mildew, which destroys it from the inside.

I see penetrating waterproofing as the most effective, reliable solution, since it completely closes the internal pores, filling them with a substance insoluble in water. In liquid form, this composition penetrates deep into the porous structure of concrete, after which it crystallizes. None coating waterproofing does not have the same high efficiency.

How to seal a plastic caisson?

When installing plastic caissons, only the technological holes need to be sealed. Special threaded fittings or more expensive sealing couplings are designed for this. Some modifications of caissons are supplied with pipes for fittings already welded at the factory to facilitate installation.

Some craftsmen use improvised means, such as drain cuffs washing machines, car tie rod boots, but I have been convinced more than once that all these are temporary solutions, so it is better to immediately use solutions specially designed for these purposes.

If for some reason you need to seal some joints, seams, cracks, then I recommend using thick mastics rather than silicone. They differ high adhesion, optimal elasticity, cope well with the assigned tasks.

Caisson: plastic or metal?

I have already spoken about the disadvantages of plastic caissons above. Their use is permissible only when the groundwater level is low and precipitation volumes are small. Even the presence of stiffening ribs will not save it from squeezing out or deforming the bottom, since the pressure of high groundwater is really very high. Yes, it is possible that the bottom of a metal caisson may deform, but in comparison with its plastic counterpart it will withstand much more high pressure. Here's another Some of my arguments in favor of steel construction:

• High strength, resistance to mechanical stress– soil movements, surface pressure
• Optimal weight
• Possibility of using welding for reliable installation connecting elements

If necessary, a factory steel caisson can be upgraded by welding additional stiffeners onto the bottom and walls, if it is known that the groundwater level is really high. You can also use additional weights or make a dead tie to a concrete pad.

To make it easier for you to evaluate the features of each existing species caissons, I give below comparison table with their main characteristics.

Optimal caisson installation depth?

The installation depth of the caisson is determined in accordance with the characteristics of the soil and climate of the region. For me, the depth of soil freezing is of decisive importance, which in the Moscow region is 1.34-2.21 meters, depending on the type of soil and its composition. The bottom of the caisson should be below this level. By personal experience I can say that the depth of the pit for the caisson in the Moscow region will not exceed 2.5-3 meters. The supply pipeline is brought to the house at a depth 1.5-2.5 meters and is additionally insulated. If the caisson is equipped and installed correctly, then freezing of water in the pipes is excluded.

Professional well development – ​​selection and installation of caissons

Highly qualified and large practical experience combined with knowledge of the downhole equipment market allows me to accurately select the most suitable caissons for wells in the Moscow region. We ourselves deliver the structure to the site, carry out installation, sealing, connecting equipment and supplying water to the house.