How to install a sink in the bathroom

You are faced with the fact that you do not know how to install a sink in the bathroom? In the view of many people, doing this kind of work is only possible for a professional plumber who has a large number of tools. However, not everything is as difficult as it may seem. After reading the stated material, you will understand that the installation of the drain can be done by yourself.

Siphons can be of different heights. Therefore, the first thing you need to measure the distance from the bottom of the bath to the floor. It should be at least 15 cm. If the bath is not yet installed, then you need to install and firmly fix it - it should not move.

What kind of device is

How to install a sink in the bathroom Siphon for Bath

How to install the drain in the bathroom? For a person who is not familiar with this kind of terminology, such a question can only raise additional questions, but in reality this means that a special siphon will be installed in the bathroom with a tap to connect overflow. This is what we will talk about, but first you need to understand the device and the principle of operation of this device.

The principle of operation of the siphon

How to install a sink in the bathroom Water seal diagram

Regardless of the design, drain It is equipped with a siphon, in which water must constantly be present, and if it evaporates or if a water seal fails, unpleasant smells will get into the room from the sewer pipe. To avoid this, a funnel pipe or a vacuum valve must be installed.

If the reason for installing a new drain is that it smells bad, then you need to determine if the siphon is to blame.

Bathtub drain unit

How to install a sink in the bathroom Simple bath siphon

Deciding to purchase the simplest modern bath drain, you will encounter the fact that instead of the device shown in the picture, you will be given a package with a bunch of plastic parts. Do not be afraid! If not you, then your children or grandchildren collected designer Lego. You can be sure that siphon assembly is much easier and faster.

How to assemble

How to install a sink in the bathroom Drainage device

So, the siphon was purchased and delivered home . So that no part is lost, open the package and lay out the contents on a wide table, and preferably on the floor. Carefully inspect every detail so that there is no flaw. Check for loose connections.

Branded siphons are packed in a cardboard box and are completed with detailed assembly instructions. Defective parts almost never come across.

Finding a thorough assembly instruction is unlikely to work out - at best, a small siphon pattern. Since there are not as many details as it may seem, it will be easy to find a place for everyone. So what should pay close attention, so this is which side to install the rubber seals. The fact is that they are cone-shaped. The rule of installation of these rubber bands is one - narrow to the neck, and wide to the nut, which is clearly seen in the figure (shown by brown arrows). Immediately crimp all connections are not worth it, as you may need adjustment in place.

Installation of the drain

How to install a sink in the bathroom Installation of the siphon

Having collected the drain, you need to install it in bathtub.

  • First of all, you need to check if there are any pieces of the old gasket or some kind of debris left. The landing area must be clean and smooth (both inside and outside the bath). If this is not the case, the installation cannot be performed until the problem is resolved.
  • The lower part of the siphon has a wide neck with an inside outburst - this is the seat for the gasket (shown by the blue arrow). If the length of the hands allows, further installation can be performed without an assistant. A siphon with a gasket laid on it is brought under the bottom opening of the bath and held in that position.
  • From inside the bath, check that the bottom gasket does not move to the side.
  • A gasket is placed on the drain hole (indicated by a green arrow), the top cover is installed and screwed onto the grille. In modern models, the fixation is carried out with a copper screw; in older models, the cap is threaded and screwed directly into the siphon.

How to install a sink in the bathroom We clamp the siphon

  • In the same way, the overflow hole is tied and its connection to the siphon using a flexible hose with pre-worn nuts and conical washers.
  • The next step is to connect to the sewer. As a rule, there are no problems when connecting to PVC sewer pipes, but in order to make the connection to the cast-iron pipe, you will have to purchase a rubber sleeve of a suitable size.
  • Having pressed all the connections, you need to check whether there are any leaks. This is done simply - water is drawn into the bath, and under the bath you need to look.Then you need to close the cork and check if there will be drops of water from the bottom when the bathtub is a bit full. The final step is to check the tightness of the overflow installation. For this you need to draw water until it is poured into the siphon through the overflow.

Is it dry under the bath? Then the siphon installation was successful.

Plastic parts do not have high strength, so when fixing them do not need to exert great effort. Having found a leakage, disassemble the connection and, having lubricated the gasket with sanitary silicone, assemble it.

Automatic types of drains

How to install a sink in the bathroom

Now we will analyze what automatic drain-overflow is and how to install it correctly.

It is important to take into account that among these devices there are models in which the control of the discharge occurs in different ways.

  1. Drain-overflow automatic.
  2. Drain-overflow semiautomatic.

It would be wrong to say that one is convenient to use and the other is not, as they are structurally different. Therefore, everyone chooses a drainage mechanism at his discretion.

If we talk about cheap models, automatic overflow will not last long. Since it cannot be repaired, soon the whole device will have to be changed again.

Installation of the semi-automatic siphon

How to install a sink in the bathroom Drain overflow for the bathroom Alcaplast

Semi-automatic siphons (as well as automatic) can be made from:

  • plumbing plastics;
  • brass;
  • copper;
  • chrome-plated steel;
  • silumin.

The silumin siphon is the worst choice. Not only can it break during installation, so after a while it is easy to crumble. Products made of copper, brass and chrome steel can be called durable, but because of their high cost, they are not in great demand.

How to install a sink in the bathroom Parts and assembly procedures

Sanitary plastics products are stronger than silumin siphons and are more durable because they are not afraid of aggressive environment. A significant role in the popularity of plastic products is played by their low cost and simple installation. As for the assembly, the process is not much more complicated than the installation of an ordinary plastic drain-overflow, and differs only in the fact that instead of the grids, you need to install controls, as shown in the diagram above.

Installation of an automatic siphon

Installing an automatic drain is even easier than semi-automatic, since you do not need to install controls - the whole mechanism is at the bottom of the siphon.

If the water supply to the bowl is also provided for in the automatic drain, then a representative of the company should install such a device, otherwise the manufacturer will no longer fulfill the warranty conditions since you have completed the installation. If it is simpler to say - under the guarantee it will not be repaired or replaced.

Practical tips

How to install a sink in the bathroom Installing the siphon

The purchased drain system must be comfortable and reliable, what you need to take care in advance. When making a choice, it is important to note the following:

  • The drain mechanism can be controlled by means of a valve, button or knob. Decide in advance and firmly decide which mechanism is right for you and will be the most convenient. If it's hard to imagine, then you can go to the plumbing shop and ask the seller to show different models.
  • If a metal drain-overflow system is purchased, then you definitely need to find out what metal it is made of. Some manufacturers of silumin products are sprayed on them and outwardly they are very similar to products made of brass.
  • The white bath will be in harmony with any colors of the siphon caps. The main thing is that there is no nalapy and disharmony with the style of the room.
  • Automatic or semi-automatic? Do not rush to make a decision, just hearing the word automaton. The draining method differs radically. In an automatic system, in order to bring the mechanism of action of the drain into action, it is necessary to apply a force to the lid covering the drain hole. If you need to drain the water, taking a bath, then there is no problem. The semi-automatic system controls the drain system from the outside.
  • When choosing a semi-automatic system, it is important to pay attention to the location of the control cable - it can be both outside and inside the overflow pipe. The latter arrangement of the cable is more aesthetic, but is beyond repair.

It is easy to install a siphon on the bath yourself. It is necessary to follow the advice from the presented instructions for assembling and installing a specific model of equipment. .


This video shows how to assemble a simple bath siphon:

See how the bath straps are replaced:


How to install a sink in the bathroom Hard connection of the drain pipe

How to install a sink in the bathroom Connection with a corrugated hose

How to install a sink in the bathroom Plastic overflow

How to install a sink in the bathroom Tying the siphon of the bath

How to install a sink in the bathroom Copper overflow

How to install a sink in the bathroom Brass overflow

How to install a sink in the bathroom Sewage pipe is too high

How to install a sink in the bathroom Corrugated hose as a siphon


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