Fasteners for kitchen sinks. Installing a sink in the kitchen - do it yourself, reliably and firmly. Features of installing sinks made of different types of materials

Fasteners for kitchen sinks. Installing a sink in the kitchen - do it yourself, reliably and firmly. Features of installing sinks made of different types of materials

The sink in the kitchen has a strategically important role, so you need to choose and install it yourself correctly.

Choosing a kitchen sink and preparing for its installation

Before deciding how to install a sink into a countertop, you need to decide on the choice of product. The best option is to connect a deep sink and a faucet that is not too high - in this case there will be a minimum of splashes when washing dishes. The sink should be deep so that it is convenient to wash large pots or stack plates after a family dinner.

The material also matters - it is easiest to connect a traditional stainless steel sink yourself. Enameled steel would also be a good solution.

Installing a kitchen sink with your own hands requires the following tools and materials:

  • Sealant;
  • Self-tapping screws and screwdrivers;
  • Jigsaw;
  • Fasteners (as a rule, they are included with the product).

Advice! Before fixing the kitchen sink, you should carefully treat all seats with sealant. This will ensure high-quality waterproofing and protection of the chipboard from damage due to high humidity.

Types of kitchen sinks

Installing a kitchen sink with your own hands can be done using various technologies. The installation method is selected depending on the type of sink structure:

  1. Invoices are considered the most budget-friendly and easiest to install with your own hands. The sink is placed on a separate cabinet. The disadvantage of this option is that there are gaps between the sink and the cabinet.
  1. Mortise ones are installed directly into the tabletop, for which you need to cut out the corresponding hole.

  1. Undercounter sinks belong to the more expensive segment; they are mounted below the countertop, thanks to which they provide excellent sealing and appearance.

Installation of an overhead sink

The affordable overhead (built-in) sink is made of stainless steel. It is mounted on a separate module and covers its entire upper part. The installation is very simple here - special L-shaped elements with an oblique slot are used for fastening. About 4-5 such fasteners are provided for one sink.

Advice! The connection of the mixer is carried out before the stage of installing the sink (the sink is installed with the equipment already installed) - otherwise it will be inconvenient to do all this at subsequent stages.

How to attach an overhead sink with your own hands:

  1. You need to attach the L-shaped fasteners to the cabinet from the inside and make notes;
  2. Screw the screws in the marked places. It is important to choose short 15 mm screws and screw them in so that no less than 5 mm remains above the mark;
  3. Cover the end of the drawer with sealant - it will protect the furniture and additionally glue the sink;
  4. After this, the sink is installed on the screws screwed into the cabinet and moved until it fits completely;
  5. Then the fasteners are fixed, the excess sealant is wiped off, and you can begin connecting the sink to the water supply and sewerage system.

Inset sink type - step-by-step installation

Of course, it’s easier to install an overhead sink yourself, but a built-in model provides a greater level of tightness and looks very neat on a cabinet with a common countertop. The question of how to embed a sink into a countertop is solved quite simply - you just need to make the right hole for the sink.

Installing a sink into a countertop is carried out according to the following algorithm:

  1. The location of the sink is found on the countertop and the shape of the future hole is determined. To do this, turn the sink over and trace the contour directly on the countertop or on cardboard. If you have chosen a product of complex shape, then a ready-made template is most likely already included in the kit - this will help you cut out the desired hole;
  2. The finished template is applied to the tabletop at a distance of about 7 centimeters from the edge and begins to be cut out. To do this, step 1.8 cm deep from the edge of the template, leaving support for the sides of the sink;
  3. On the cutting line, first make a hole with a drill, and then cut out the outline with a jigsaw. The lower part of the tabletop is secured so that it does not fall out during cutting and damage the edge of the remaining surface;
  4. Sealant is applied along the contour of the cut. It also covers the lower joints of the sink;
  5. You can start attaching the sink - it is pressed with the included clamps;
  6. After the excess sealant has been removed, you can begin connecting the communications.

Installation of the sink flush or below the level of the countertop. Unusually shaped sinks

An undermount sink can be mounted flush with the countertop - however, this is a labor-intensive process that requires experience, since it involves removing the layer of countertop under the edge. The depth of removal is equal to the height of the side with a layer of sealant.

If you decide to install and connect the sink so that it is below the table level, you will have to resort to the services of specialists. After all, this installation method is chosen for expensive structures - not made of steel, but of natural, artificial stone. In this case, special tools are required for fastening - for example, a jigsaw and diamond-coated saws. Indeed, in such sinks there may not be a hole for draining water - complete sawing of products is not carried out in industrial conditions. Sinks made from natural materials are secured with a special mounting adhesive.

As for sinks with unusual shapes, they come with a paper template from which the installation hole can be cut.

Do you want to connect the sink yourself correctly? Don't forget 3 more points:

  1. It is better to replace rubber seals with silicone sealant. Rubber will not provide a tight fit and does not have a sufficient service life, while the sealant will fill all the gaps and cracks;
  2. It is better to connect sinks made of natural or artificial stone together to prevent falls and damage;
  3. Fastening the sink to the countertop or module with self-tapping screws is carried out exclusively by hand. Using a tool may create too much tension, which may damage the structure.

Main rules of connection

When the installation work is completed, you can connect the sink. To do this, the hoses through which cold and hot water will pass are connected to the general water supply system.

Advice! The connection requires the use of a rubber gasket to better seal the joint.

After the hoses are secured, the connection is made in the following sequence:

  • A siphon outlet is inserted into the sink (it is better to use S-shaped designs, since the bottle one gets clogged too quickly);
  • A pipe (angular rigid or flexible corrugated) is added to the siphon;
  • The pipe from the siphon is discharged into the sewer pipe;
  • All connections are checked for leaks.

It may turn out that the diameters of the pipes from the siphon or sewer are very different. In this case, it is necessary to use an adapter - a sealing cuff. At this point, the installation of the kitchen sink is considered complete.

Based on the principle of placement on the underframe, sinks are divided into overhead and built-in. The surface of the washing panel can be located above the plane of the countertop, be flush with it, or be below the level of the desktop. In any case, the bowl under the mixer should be installed between the sections of the set to place dirty dishes and for cooking and serving dishes.

The cabinet on which the overhead sink is mounted is often a separate element of the kitchen interior. Mortise and integrated sinks are mounted into the continuous surface of the desktop of the floor-standing modules of the sets.

Installation of an overhead washing panel

Sink connection diagram: 1 – mixer pipe; 2 – gasket; 3 – fixing nut; 4 – flexible hose; 5 – pipeline supply; 6 – overflow hole; 7 – combined drain; 8 – drain device; 9 – compression ring; 10 – compression coupling; 11 – double-turn siphon; 12 – drain pipe.

Overhead types of sinks are easier to install than others. This is the traditional way of installing dishwashing equipment. In the kitchen interior, it is a free-standing cabinet with a sink, complemented by a panel for storing washed kitchen items.

The panel is fixed on the cabinet using fasteners in the form of brackets or pushed onto the base into the grooves of the cabinet using special slides.

The sink kit may include an adhesive tubular seal that is inserted into a groove on the panel. The joint between the cabinet and the washing panel is coated with silicone sealant to protect against moisture penetration.

Rubber seals do not adhere tightly to the joining surfaces and have a short service life. More often they are replaced with a moisture-resistant sealant; it tightly fills the gaps and retains its properties for a long time when dry.

The underframe usually does not have additional internal elements; this provides access for repairing supply pipelines, cleaning the siphon and sewer pipes. Sometimes supporting bars are attached under the overhead sink to enhance the strength of the structure.

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Before attaching the sink to the countertop, the mixer, water supply hoses and siphon are installed. The overhead sink is secured with L-shaped fasteners with an oblique slot. 4-5 such elements are installed. Self-tapping screws are screwed into the mounting points marked on the inner surface of the cabinet. They should protrude 5 mm from the walls of the underframe. It is better to screw in the screws with a screwdriver; if you use a screwdriver, the tabletop may be damaged.

During installation, the fastening grooves are placed on the screws and the sink is moved until it is firmly fixed to the overhead sink. Then the screws are tightened and the protruding sealant is removed.

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Installation of a mortise sink

To prevent water from splashing when washing dishes, choose a deep sink and install a low tap.

The sink is installed in a pre-cut hole in a solid countertop. Moreover, the sink itself can be made of various materials: stainless alloy, earthenware, porcelain, etc.

To insert a washing container, you will need some tools and additional materials:

  • jigsaw with a fine-toothed file;
  • drill, screwdriver;
  • pencil, ruler, tape measure;
  • self-tapping screws, silicone sealant;
  • wrenches for installing the mixer;
  • sandpaper, construction knife.

The contours of the installed panel are marked with a pencil, turning it over and laying it on the countertop. The distances from the front and rear edges of the latter are at least 5 cm. Then the location of the bowl relative to the edges of the panel is measured. The outline of the hole cut for the sink appears along them.

The bowl can be of various shapes, so it is necessary to transfer its geometric parameters to the surface of the tabletop as accurately as possible. Manufacturers of mortise sinks often include a template with the kit, according to which the shape of the hole is drawn.

The cutting line should extend outward from the sides of the bowl by about 1 cm. A hole is drilled at one of the points on the contour to insert a jigsaw blade. For a rectangular bowl shape, holes are drilled in the corners of the intended contour.

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Painting tape is glued to the outside of the outline. It will protect the surface of the tabletop from damage by the jigsaw foot when cutting. On a removable tabletop, the material is sawn with a jigsaw from the front side, so the surface cladding is less damaged. In the process of cutting the opening, self-tapping screws are screwed into the cut to a small depth so that the inner part does not fall out during operation. The sector to be removed can also be secured from below with support.

The edges of the tabletop along the saw cut are covered with silicone sealant to protect the material from moisture penetration. The sealant is also applied under the edges of the panel along the drawn contour. A sink with a built-in faucet and siphon is inserted into the prepared opening and secured to the countertop with clamps included in the plumbing kit. All that remains is to connect the mixer to the water supply and drain the sink through a siphon to the sewer.

A kitchen sink is as necessary an attribute as a stove or refrigerator. There are a huge number of types of sinks, however, the most popular design is the overhead kitchen sink, the availability and ease of installation of which create high demand among consumers. Operation of overhead plumbing fixtures is impossible without the kitchen cabinet on which it is installed. In other words, the sink and base cabinet represent a single structure in the kitchen interior. Therefore, it is very important to attach the stainless steel sink to the cabinet correctly so that washing dishes and food is comfortable and convenient. In our article we will provide an overview of the most common methods of fixing sinks to different bases and describe an algorithm for doing the work yourself.

Main characteristics of countertop kitchen sinks

Overhead sinks get their name from the way they are installed. In essence, it is a tabletop with a bowl, made of various materials. Stainless steel is most often used for the production of kitchen sinks, due to the following advantages:

  • Light weight.
  • Durability. Stainless steel plumbing is resistant to water corrosion and lasts for many years without rust removal or special painting.
  • Hygiene. The shiny surface is easy to clean from grease.
  • Affordable price. Stainless steel sinks are the most inexpensive on the market.
  • Easy to install and dismantle. Assembling the sink involves placing it on the surface of the cabinet and fixing the entire structure with self-tapping screws. To remove the sink, just unscrew the 4 plastic fasteners from the underside.

Important! The disadvantages of a stainless steel sink include a low level of sound insulation when in contact with water. Although, in most cases, low-quality products have this disadvantage, in the manufacture of which only one steel sheet was used. To avoid this problem, purchase a sink with an under-mounted bowl and sufficient depth.

Device

An overhead sink made of stainless steel is a tandem of a sink and a kitchen cabinet without a back wall (to connect the siphon to the drain pipe).

Despite the fact that the cabinet does not have shelves, its space is often used to store a trash can, auxiliary tools and empty bottles. The cabinet is closed with doors, and its outer surface can be made of any material and have a different color. The choice of cabinet design with a sink depends on the overall interior of the kitchen.

Important! The kitchen sink is sold separately or as a set with a cabinet. It is preferable to choose the second option in order to save yourself from the need to look for a suitable size cabinet for the sink.

As for the sink itself:

  • All models of overhead sinks are equipped with sides on three sides (front and sides), thanks to which the sink can be installed on the cabinet.
  • The back side of the structure, adjacent to the wall, does not have a side, but has a raised edge to prevent water from draining onto the floor.
  • The shape of a bowl in an overlay design is most often rectangular or square with rounded edges. This shape makes it easier to clean the interior surface of the plumbing fixtures.
  • The dimensions of the side walls of the bowl are standard: from 40 to 60 cm, and the depth is from 15 to 20 cm.
  • An emergency drain can be provided in the back wall of the bowl in case the sink overflows with water. When installing this model, the hole is connected to the main drain.
  • Some sink models have a special grid for sifting out large food debris. The grate is mounted in the drain hole of the bowl and performs two functions: it prevents clogging of the drain pipe and closes the hole in the bowl as a plug.
  • The surface of the bowl can be either matte or glossy. The matte option is more practical, as stains and dirt are less noticeable on the surface.

Important! Although stainless steel sinks have a simple design, they can be equipped with additional elements, for example, a second smaller bowl for washing food or a special ribbed countertop for storing wet dishes and laying out vegetables and fruits after washing. The surface of the metal countertop has small depressions and protrusions to prevent food and utensils from rolling off it. The ribbed tabletop can be located either to the left or to the right of the bowl.

How is furniture assembled under the sink?

Installation of an overhead stainless steel sink on a cabinet is carried out in two stages:

  • Assembling the support stand.
  • Sink installation.

To work you will need the following tools and materials:

  • Screwdriver or set of screwdrivers.
  • Fasteners (angles and screws).
  • Pliers.
  • Silicone sealant to protect sinks and cabinets from moisture.

Let's look at each stage of installing an overhead sink in more detail.

Equipment

Any cabinet furniture is delivered unassembled. Fastening parts are included with the furniture, so assembling the cabinet and attaching the stainless steel sink with your own hands is not difficult at all.

The body parts of the support stand are sawn rectangles from a sheet of chipboard. All parts have standard sizes, and the edges are already processed. The cabinet kit includes the following parts:

  • Side walls - 2 pcs.
  • Doors - 2 pcs.
  • Cross bars to ensure rigidity (drawbars) - 3 pcs. The drawers are located between the side walls in the following places: under the bottom (bottom front), under the sink (top front) and in the back in the middle.
  • Accessories (hinges and handles).
  • Fastening elements.

Step-by-step instruction:

  1. Disassemble the packaging, remove the packaging material and lay out all the parts. Check that the components comply with the assembly instructions.
  2. Connect the side walls and front drawers using corners and self-tapping screws. Install the bottom drawer first, and then the top drawer. Screw them to each side panel at the corners.
  3. Connect the resulting structure to the bottom so that the edge of the bottom rests on top of the lower front drawer. Attach a bottom to each side and to the lower front drawer.
  4. Install the back drawer, attaching it using corners to the side walls of the structure in the middle.

Important! The doors are hung on the cabinet only after the sink has been installed.

How to attach a stainless steel sink to a cabinet?

There are several ways to attach a sink to a cabinet:

  • Using sealant. Apply caulk to the edges of the cabinet and install the sink on top.

Important! Although the sealant combines two functions - protective and fixing, the reliability of the fastening is questionable, since the sink must withstand considerable weight loads.

  • Polyurethane foam. This method is very simple. The foam is applied to the edges of the side and front walls of the cabinet, after 10 minutes the sink is installed. After the foam has dried, the excess is cut off.

Important! Although the foam has great adhesive force, in fact, the sink lies only on the walls of the cabinet, so the reliability of this design is questionable.

  • On special L-shaped fastenings. If the kit includes special mounting brackets, the installation of plumbing fixtures will be of higher quality, reliable, durable and strong.

How to attach a stainless steel sink to a cabinet with fasteners?

Step-by-step instruction:

  1. On the inside of the cabinet, mark the locations for fasteners with a pencil.
  2. Screw the screws into the marked places (not all the way).
  3. Secure the brackets using self-tapping screws.
  4. Install the sink into the grooves of the fasteners. Check whether it lies evenly in the place allocated to it.
  5. Remove the sink and turn it upside down.
  6. Apply sealant to the ends of the side walls.
  7. Seal the perimeter of the sink with silicone sealant.
  8. Insert the bowl into the grooves of the brackets.
  9. Screw the sink from the inside with self-tapping screws.
  10. Remove any silicone that protrudes from under the edge of the sink with a wet cloth.
  11. Connect the water supply. Use flexible connecting hoses that make it possible to move the sink away from the wall for ease of installation. Connect the siphon to the drain pipe, connect the flexible hoses from the mixer to the source of hot and cold water.
  12. Hang the doors on the cabinet. To install the doors evenly, first screw the hinges to the doors, then attach them to the side frame and use chalk to mark the locations of the hinges and their holes on the side frames. Screw the doors one by one, making sure that the marked location of the hinges matches.
  • Install a surface-mounted sink with a faucet and siphon already attached to it, as this will be difficult to do after installation.
  • To connect the water supply, use metal-plastic pipes. They are reliable, flexible and durable.
  • The overhead sink can be secured using a sliding method. In this case, the cabinet must be equipped with guides, and the sink must have special curved edges. Installation of this model is quite simple - just insert the curved elements of the sink into the guides of the cabinet and push it all the way.

How to attach a stainless steel sink to a countertop?

The process of installing a sink into a countertop should be carried out according to the following scheme.

Step #1. Contouring the seat

First of all, you need to prepare a place for the future sink. To do this, place the sink itself on the surface of the countertop or make a template from a dense material in the shape of the purchased sink, leaving allowances of 1-2 cm, and try it on the countertop. Mark the template using a marker.

Important! It is much more convenient to work on a tabletop laid with the wrong side up.

Step #2. Working out the landing zone

First, you need to protect the countertop from scratches and other damage. To do this, cover the space around the intended hole with masking tape.

Using a jigsaw, make a hole for the sink as follows:

  1. Use a drill to make cutting starting points (2 mm), connect them with a chisel, turning them into a gap.
  2. Cut the grooves with a jigsaw, keeping the cut perpendicular.
  3. Process the edges of the hole with a rasp and remove large burrs.
  4. Apply sealant to the cut to prevent the wood from swelling when in contact with water.
  5. If you previously dismantled the countertop, then return it to its place. Apply sealing butyl tape around the perimeter of the hole.

Step #3. Sink installation

  1. Install the sink into the hole so that at least 10 mm of the edge extends over the entire section of the countertop.
  2. Press down on the shell.
  3. Secure the sink from the reverse side using standard fasteners. For installation on thin countertops, additionally use wooden blocks.
  4. Treat all areas where the sink meets the countertop with silicone.
  5. Remove excess sealant with a clean rag or wet cloth.
  6. Allow the composition to set for 10-12 hours and connect the water supply and sewerage system.

Important! The joint can be sealed with either silicone or self-expanding tape.

The method described above for how to attach a stainless steel sink to a countertop is suitable for kitchen sets made of MDF or wood. Structures made of natural or artificial stone must be processed with a special professional tool. In this case, the installation must be carried out by specialists.

Video material

We hope that our information helped you install a sink on a cabinet or countertop. Follow the rules for using stainless steel plumbing, and it will serve you for many years!

When purchasing an overhead sink, you need to check the dimensions of your underbench on which the sink will be mounted and check what components and fasteners are included in the delivery of your kitchen.

Installing an overhead kitchen sink from A to Z

First of all, according to the instructions, the underframe is assembled. This is a quick and uncomplicated process, but there is no need to rush to install the door - it will interfere with installation in the future. The walls of the underframe are connected using self-tapping screws or wooden pins. There are usually holes for screws and pins; if not, they are drilled during assembly.

Rice. 1 Assembling a kitchen cabinet

At the second stage, fastenings are installed on the underframe - L-shaped plates with a slot diagonally on one of their sides. If the fasteners are not included with your kitchen, you will need to buy or make them yourself. For reliability, it is enough to install 5 fasteners.

Rice. 2 Mounts

The fasteners are fixed with self-tapping screws to make them easier to tighten; you need to pre-drill holes in the walls with a diameter slightly smaller than the diameter of the screws. There should be no dampness under a properly assembled sink, but it is better to use stainless steel screws.

The sequence of work is as follows: the fasteners are applied to the corner between the inner side of the wall of the underframe and its upper end, the location of the slot is marked with a pencil. Five millimeters above the bottom of the mark, a non-through hole is drilled and a self-tapping screw with a length not exceeding the wall thickness is screwed into it. The procedure is repeated for each of the fasteners.

Rice. 3 Attach fastenings


Rice. 4 Mark the location of the slot


Rice. 5 Screw in the self-tapping screw

Next, a mixer and a siphon are mounted on the sink - until the sink is installed, this will be much more convenient. When installing these plumbing fixtures, you should pay special attention to the correct installation of gaskets that ensure tight connections - after installing the sink, it will be extremely inconvenient to carry out adjustment work.

Rice. 6 Install siphon and drain

To prevent the chipboard from further swelling from moisture, a layer of silicone sealant is applied to the upper end of the walls of the underframe.

Rice. 7 Apply a thin layer of sealant

Now you can install the sink. To do this, carefully, so as not to damage the installed siphon and mixer and not to touch the applied sealant, it is turned over, the fasteners are installed on the screws that have already been screwed in and are shifted along the oblique slot until the sink is pressed against the underframe. Sealant squeezed out of the cracks can be easily removed with a rag.

Rice. 8 Installing the sink

All that remains is to connect the siphon to the sewer pipe, the mixer using flexible wiring to the hot and cold water pipes and install the door on the underframe. Connections to sewer and water supply networks must be done very carefully, controlling the force so as not to damage the threads on the connections.

Rice. 9 Checking the work done

After connecting the water, plug the drain hole with a plug, fill the sink with water and check for leaks at the connections between the siphon and the mixer. Good luck!

Today, most kitchens use flush-mounted sinks; this installation method both looks better and is more convenient to use. But if you wish, you can go the other way - an overhead kitchen sink will significantly simplify the installation process.

Features of overhead sinks

In addition to the overhead installation method, you can also select mortise-mounted sinks. This placement option is characterized by a solid countertop; a hole is simply cut out in it, the contour of which coincides with the outline of the sink. Its dimensions are also equal to the dimensions of the sink, for example, for a standard size of 45x60 cm you will need an appropriate cutout.

The strengths of this installation include:

  • great appearance– the tabletop is monolithic and, in addition to the aesthetic component, it is also very convenient;

  • the likelihood of moisture getting on the wooden elements of kitchen furniture is minimal;
  • If desired, you can use an under-counter option for placing the sink. In this case, the countertop is located above the sink and it looks unusual.

Overhead kitchen sinks also have a right to exist. The main difference from mortise installation is that a separate cabinet is built under the sink (it is also called an underframe). The plumbing fixture is simply installed on top of it, hence the name.

Note!
When installed, it does not rest directly on the chipboard cabinets; special plastic L-shaped fasteners are used for installation.

This installation method differs in that:

  • The installation work is very simple. The sink is bought, and the base can even be assembled with your own hands from sheets of chipboard or wooden blocks;

  • Such a sink is easy to replace; all you need to do is remove the underframe, remove the 4 plastic fasteners from the reverse side and the sink can be removed;
  • Despite all efforts, it will not be possible to get rid of the gaps between the underframe and other kitchen furniture. Water is guaranteed to get into them, for example, when washing dishes or vegetables and fruits, and it is clear that moisture is not good for the tree;
  • Usually, for surface-mounted installation, it is not a designer sink that is purchased, but an ordinary sink of the correct shape; it costs much less. For example, the price of a regular stainless steel model is in the range of 2-4 thousand rubles, so this also results in a small saving of money.

If we compare the prevalence of mortise and surface-mounted installations, mortise models have recently become increasingly popular. Many people don't mind spending a little more effort on installation and getting great results.

However, overlay installation should not be considered the choice of simpletons. For example, if you need to decorate the interior of a kitchen in a rustic style, then installing an overhead sink with your own hands on a frame made of wooden blocks will look much more profitable than a mortise analogue. And in modern kitchens, overhead installation is valued for its simplicity and reliability.

Installing a sink on a cabinet from A to Z

The task of installing an overhead sink in the kitchen can be divided into several stages:

  • layout - although the cabinet is not particularly sophisticated in design, you can make a drawing and estimate the dimensions of the sidewalls, as well as the placement of additional elements (drawers, doors, etc.);
  • cutting chipboard sheets and assembling the cabinet;
  • installing the sink on the cabinet and connecting it to the sewer.

Sketch of a cabinet

The cabinet for the overhead sink should be almost identical in size to the sink; nothing should protrude beyond it. Once installed, the sink should look like the completion of the cabinet.

In order to simplify installation for surface-mounting, it is better to choose a sink without any special design frills. Thanks to the geometrically correct shape, it will be easier to achieve a tight fit of the walls of the cabinet to the bottom of the plumbing fixture.

The design of the underframe is not complicated - the simplest option is a frame made of wooden blocks. The size is determined by the dimensions of the sink; if its dimensions are 800x500 mm, then the frame in plan should have the same dimensions.

You need to prepare a drawing of 2 solid walls, a bottom, a plug (closes the gap between the bottom and the floor), and also decide on the door and additional equipment for the cabinet (all kinds of drawers and shelves).

Note!
When selecting the height of the underframe, you need to take into account the height of the person.
As a rule, a cabinet with an overhead sink with a height of about 90 cm is suitable.

Assembling the underframe and installing the sink

The practical part begins with cutting out chipboard sheets in accordance with the drawings. It is important here not to ruin the edges, because chipboard is a rather capricious material. The cut is made with a jigsaw with a special blade for cutting chipboard (the teeth are bent inward). Also, for insurance, adhesive tape is glued along the cutting line, and before working with a jigsaw, you can forcefully draw it along the line with a knife; after that, only the inner layer will need to be cut with a saw.

It is too early to install an overhead sink - you need to assemble a frame from individual elements. To connect the walls and bottom, confirmats (Euroscrews) are used; before screwing it into the chipboard, be sure to drill a hole with a slightly smaller diameter than the threaded part. Afterwards, the screw heads can be masked with special plastic covers.

As for how to install an overhead sink on a cabinet, for this you will have to purchase special plastic fasteners with an oblique groove on the side for a self-tapping screw. At first, the self-tapping screw does not tighten completely, so the fasteners can be moved along with the sink. The sink moves until it reaches the design position, after which the screws are tightened to the end.

The installation issue can finally be considered closed after the sink is connected to the sewer and the water supply is organized. For convenience, you can connect it even before installing the sink on the cabinet. At this point, the question of how to install a sink using the overhead method can be considered closed.

In conclusion

The invoice, despite its shortcomings, also has an important advantage - it is very simple and even a beginner can handle it. The proposed material can be considered as a specific guide to action.

The video in this article shows the process of producing countertop sinks step by step.