Sink drain: assembly and installation of a drain with overflow

A sink drain, like any other plumbing fixture, is vulnerable to breakage. Its installation is a simple procedure, for the sake of which it makes no sense to invite a professional plumber.

How is the sink for the sink and what nuances to consider when installing the device, let's take a closer look.

Purpose and design features

The drain for the sink in the bathroom or in the kitchen with overflow is a curved design, the key purpose of which is to redirect excess water to the sewer system, thereby preventing overflowing of the sink bowl.

The device drainage system is almost identical for both the sink and the bath.

System operation diagram
At the time of flushing, water first enters the siphon cavity, from where it flows into a curved "knee" and moves in the direction of the general flow.

Structurally, the drain overflow for washing or sink consists of the following elements:

  • siphon with water seal- it is a “U” -shaped element that performs a dual task: it prevents the discharge of fetid odor from the sewage system and protects the drain pipe located below from clogging.
  • a drain pipe- made of corrugated or rigid plastic pipe and is designed to redirect flows to the sewage system.

The main secret of the siphon functionality in its design. Due to the bend, the water does not completely leave the pipe. Formed a water seal and acts as an obstacle to the penetration of the sewer "amber" into the drain hole.

Plastic pipe structure
The simplest version of the siphon is a plastic construction, assembled from nozzles of different configurations and cuffs with a diameter in the range of 32-40 millimeters

Such constructions are convenient because in case of clogging they will not be difficult to remove and clean mechanically or chemically.

Want to install a more durable device that is not so scary clogging? In this case, it is better to purchase a structure in the form of a sink overflow for the sink. It differs from models of traditional execution in that it is equipped with an additional tube.

This device connects the hole made in the upper side of the side of the bowl, with elements of the drain system located in front of the siphon. Due to this, the overflow withdraws liquid from the sink, thereby preventing overflow of the bowl.

Drain construction, supplemented by overflow
Auxiliary tube that performs the function of overflow can be made of rigid plastic or bending corrugations; it is fixed to the structural elements by means of a plastic clip

From the outside, the drain hole covers the grill. It performs a protective function, delaying small debris and hair, thereby protecting the system from clogging.

The main types of drain devices

There are several types of drainage systems. One of the most common options is the design, the drain in which is fixed by means of a large locking nut. This method of attachment can be found even in the bathrooms of houses built more than two decades ago.

Device classification

Drain siphon systems used to connect sinks are of three types: bubble-shaped, knee-shaped, and combined. They differ in type of construction:

  1. Bottle or flask-shaped. The main structural elements are two cylinders immersed in each other. Inside the flask of the device, a tee is installed that distributes the liquid and forms a hydromashon.
  2. Pipe. The main element of the two-turn design is the “S” or “U” -shaped bend of the pipe, which forms the hydraulic banding.
  3. Mixed devices. In addition to the structural elements of the bottle design, supplemented by two partitions, they are equipped with a corrugated hose.

In bottle-type devices, the drains, entering the siphon, move down the inner tube of a smaller diameter. Reaching the bottom, drains rise through the cavity between the inner and outer cylinder and are discharged into the sewer pipe.

Bottle Model
Bottled bottle models are named after the oblong shape of the tank, which looks very much like this glass vessel.

Bottle siphons are advantageous in that even with rare use of a sanitary appliance the water seal in the system does not dry out for quite a long time. This effect is achieved due to the fact that the output from the siphon is placed approximately in the middle of the flask.

Many owners prefer bottle-siphons for the reason that, if necessary, you can always connect several plums to them. To do this, the structure only needs to be equipped with an additional element.

Siphon with an additional branch pipe
Having equipped a bottle-type siphon with an auxiliary fitting, you can always connect an additional branch pipe from a washing machine to the drain system

Well proven in the work of mixed-type siphons. Gofrosiphon, involved in the construction of a mixed-type drain structure, is a modified version of a conventional curved tube.

The key difference between the pipe used in the construction of a mixed-type drain structure - it is not a rigid part, but a flexible flexible hose

Unlike bottle and tube versions among the combined versions, there are no models with sockets, and therefore it is impossible to attach overflow systems and household appliances to them.

Division of production

Commercially available sinks for sinks, depending on the material used, are of two types: those made of polymers and those made of metal alloys.

Polymer products are famous for their low price and ease of installation.The constructions equipped with a corrugated pipe, it is convenient to regulate on length.

But the service life of PVC structures is relatively short. And the sealing properties of the assembled structures leave much to be desired. Therefore, all joining elements must be fitted with rubber gaskets when assembling.

Modern plastic model
In an effort to reduce the risk of clogging of the inner walls of pipes from mud deposits, leading manufacturers in the creation of polymer products include antibacterial components in their composition.

In terms of reliability and durability, metal elements of drainage systems are more beneficial. The models of non-ferrous metals: brass and bronze are most in demand in domestic use. A harness made of such materials often has a chrome-plated coating, due to which it acquires a fairly presentable appearance.

Version of the metal construction
The only drawback of metal pipes is the tendency of the inner walls to trap and accumulate mucus and dirt, which can provoke the formation of blockages.

To prevent the accumulation of mud deposits on the inner surface of the walls in the manufacturing process, manufacturers cover metal products with a protective film of chromium.

Installation of metal structures presents no particular difficulties.Hitch can only occur at the stage, if you need to shorten the discharge pipe.

Siphons for non-standard equipment

For non-standard models of twin “double” sinks, siphons are used, equipped with two editions. Such siphon devices are connected to the sinks of both sinks, and a little lower in the course of the flow of wastewater, they are combined into a common flask.

Design with 2 editions
As with the single models, the design of the siphon devices of drain systems with two outlets can be of pipe version or bottle type

You need to connect to the communications sink, located on an open shelf? Then choose a model that involves hidden installation. Yes, for the price it will come out a bit more expensive than traditional options, but it will completely hide low-aesthetic elements of communications.

Mobile model of flexible corrugations
In addition to the D32 / 40/50 mm corrugated pipe, you can also find universal products equipped with a stepped end of the spout, which can be conveniently adapted to any size.

Drain systems of such structures will not be difficult to hide in a niche, covered with a decorative screen. But it is worth remembering that if the bend of the discharge pipe turns out to be too short, there is a great risk of the appearance of an unpleasant sewage “odor”.

Technology installation drain with overflow

There is nothing difficult in installing a plum overflow on its own. Included with each device is usually attached instructions. It contains information about the sequence in which the structure should be assembled.

Step 1. Preparation of necessary materials and tools

With all the variety of models of drainage equipment, their installation technology is almost identical. Therefore, even if a drainage system was installed on your plumbing fixture, for example, of a bottle type, you can easily replace it with the same combined version.

Structural elements of the device
Regardless of the design, any drainage works on the principle of two communicating vessels: at the highest point there is an inlet pipe that receives waste fluid from the sink, below it is a drain hose that leads it into the sewer system, and between them there is a water seal

The following items are included in the standard siphon package:

  • device case;
  • branch pipe;
  • decorative overlay for plums;
  • plastic and rubber cuffs;
  • connecting nuts and screws;
  • rubber flat pads.

To better understand the sequence in which the structure should be assembled, place all the siphon elements on a table or floor.

Variety of sealant choices
For work with sanitary equipment (sealing compounds) it is best to choose a semi-liquid sealing compound based on silicone or rubber

Installation of the system will not be possible without the necessary tools. To work will require:

  • flat screwdriver;
  • adjustable wrench;
  • FUM tape;
  • sealant;
  • tank for collecting water;
  • cotton fabric.

If in the course of work it is necessary to cut the pipes and the corrugation to the desired size, prepare a tape measure and a hacksaw in advance. For sanding the edges of the pipe - sandpaper.

Step # 2. Dismantling the old siphon

To remove a siphon device that has served its time, it is necessary to unscrew the screw set in the center in the grid located in the drain hole.

Often, the screw and nut of the drain grille “stick” to each other during operation. If you can not unscrew them, dismantle the lower part of the siphon first, leaving the upper branch pipe untouched. By rotating this part, you will help free the stubby nut and screw.

Dismantling old equipment
Dismantling the old equipment, you need to clean the internal cavity of the sewer pipe, removing from it the remnants of dirt and crumbled cement

From the moment of dismantling the old siphon to the start of connecting the new equipment, it is better to “plug” the sewer bell with a rag or stopper of the appropriate size.

Step # 3. Assembly of structural elements

When installing a pipe drain system, the assembly of the structure can be performed during the installation process by successively stringing all the elements. If you have to work with a flask system, before you can collect such a sink for a sink, you need to carry out a number of preparatory work.

First of all, the device is placed under the bowl and perform a preliminary fitting in order to make sure that the sizes match. After that, check the reliability of fastening the lower tube. To do this, unscrew the plug through the thread and inspect if there are chipped and other flaws in the rubber seal. You should not neglect this stage, as the lower plug constantly takes over the pressure of the system.

Construction assembly steps
Before assembling the structure, it is also necessary to check the mating surface of the case thread for defects and burrs.

In the case of detection of burrs on the surface, they can be cut off with a sharply sharpened knife.If they are not removed, they may damage the O-ring during installation.

Having ascertained the quality of the installed gaskets and the threaded connection, proceed to the assembly of the flask. Work is performed in several stages:

  1. Wearing a rubber gasket on the device thread, screw the bottom.
  2. At the ends of the pipe-spout put on the gasket, and on top of the long nut.
  3. After inserting the end of the spout tube into the hole in the upper part of the siphon housing, fix it in a predetermined position by tightening the nut.
  4. Having fitted the device cover with a rubber gasket, the drainage is screwed to the body with a nut.

To increase the reliability of the connection, the ring gasket inserted into the groove must be covered with a sealing compound. They should also cover the lower part of the threaded connection.

Underwrap using FUM tape
In order to be able to easily unscrew the lid of the device at the junction of the case when sealing the joint, make a sanitary reel with a FUM tape

After that, the sink is installed on the seat and proceed to the installation of the drain device.

Step # 4. Features of the overflow assembly

When dealing with models equipped with overflows, before collecting this element, it is necessary to determine the height of the tube. This parameter should correspond to the depth of the bowl.If everything is the same, the tube is connected at a given height with the main pipe.

If the overflow tube is a prefabricated structure, then its height can be easily adjusted according to the principle of telescopic retraction. The corrugated pipe is simply stretched to the required length and bent in the right place.

Mounting overflow parts
Before tightening the screw, make sure that the outlet of the overflow pipe exactly matches the opening provided for its installation in the side of the bowl

When fixing the overflow pipe to the sink, do not forget to lay the supplied rubber gasket between the surfaces. The point of attachment of the outlet with the overflow pipe is fixed with a clamping nut. In order not to damage the connection, tighten the nut by hand without any special effort.

Step # 5. Installation of the drain device

Before you connect the assembled structure to the drainage system, the surface of the sink in the area of ​​the drain hole is carefully degreased and cleaned. In the process of installation, the first thing to do with the drain hole of the bowl is a protective grid equipped with 5-6 divisions.

Connection of drainage equipment
If the diameter of the drain hole and the size of the grille match, it is enough to install the gasket, if there is a small gap, then an additional sealant will be used

The upper end of the branch pipe is equipped with a rubber gasket and dock with a hole in the sink. Tightly pressing the top side of the nozzle to the drain, fix it with a screw D6 mm, inserted into the protective grid.

The thread into which it must be buried is pressed into the body of the nozzle itself. When tightening the screw with a flat screwdriver, it is important to achieve maximum tight fit, while avoiding the turning of the flange and gasket.

From the lower end of the nozzle chamfer. This is necessary in order to ensure the free plant end of the nozzle into the cavity of the siphon. On the branch pipe "string" a plastic coupling nut, placing it with a thread to the bottom, and a conical gasket, laying the wide side to the nut. Then dock it with the outlet pipe, not forgetting to seal the connection.

For joining the outlet pipe with a sewer pipe, the diameter of which is traditionally equal to 50 mm, apply the installation rubber cuff. So that it tightly covers the pipe, thus preventing the spread of sewage "odors", use a product whose inner diameter is slightly smaller than the outer diameter of the discharge pipe.

Installation of soft corrugations
If you are using a soft corrugated pipe, make the length of the horizontal sections such that they are without tension during operation but also do not sag

Tip: if the diameter of the outlet does not match the size of the sewer pipe, use the finished plastic adapter.

The most easy to connect corrugated siphon. It is equipped with two rigid connections at both ends. To connect it, you only need to attach it to the outlet, then slightly stretch and give the desired bend. After that, the second pipe to bring to the sewer.

Step # 6. System Performance Check

At the final stage, it remains only to check the tightness of the connections and the operability of the system. To do this, a section of the floor under the siphon is covered with a cotton napkin cut or a paper sheet. Some masters for this purpose substitute capacity for siphon.

They open the tap and observe how the water goes into the drain hole and, passing through the siphon, goes down the drain.

If there are no leaks in the joints and there are no drops on the napkin, the work is done qualitatively.In case of detection of those, tighten the screws more tightly, and the connection is additionally sealed.

The technology of mounting branched siphons, which makes it possible to connect washing machines to a common drain, is practically no different. The only difference is that the flexible hoses from household appliances are additionally screwed to the branches of the structure.

Conclusions and useful video on the topic

Video review, how to collect siphon:

Installing the sink and connecting the drain:

Modern sink models for the sink is not so difficult to install. The main thing is to correctly select a model that is best suited for specific conditions, and strictly follow the installation instructions.

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