How to replace the siphon in the sink

Self-replacement of the siphon is so simple procedure that any person can cope with it. For this, absolutely no experience with plumbing is required.

Installation of a new siphon under the sink

The installation of a new siphon under the sink does not require special skills, and it can be done independently, during installation, you should pay attention to the tight connection of rubber gaskets.

The design of modern siphons for sinks is designed in such a way that they can be collected by hand and only in rare cases may need a screwdriver. However, one should not forget that, although the installation of a siphon under the sink is not particularly difficult, it is quite dangerous. And in order not to harm yourself during work and to avoid trouble in the future, it is necessary to use exceptionally high-quality materials and follow the instructions for replacing the siphon in the sink.

Safety precautions

Replacement of the siphon under the sink

Scheme replacement siphon under the sink.

Fecal water is a poisonous enough substance, and gases from the sewage system are completely explosive. Poisonous substances can even penetrate through the skin. Professional plumbers know this, and they observe all precautions.

Home masters do not almost have to deal with gas emissions or large amounts of toxic substances, but it is better to be reinsured once again than to have health problems later.

In the apartments of multi-storey buildings, the outlet of the pipe is securely closed with a water seal in the siphon. However, in the process of replacing this plumbing product, the branch pipe will open and you will be forced to work with the slurry.

This can only be done with latex gloves. Be sure to wear a respirator and a protective plastic apron. So you protect yourself from harmful aggressive influences and will be able to replace the siphon without any damage to your health.


Overall dimensions of the bellows siphon

Scheme of the dimensions of the corrugated siphon.

Before you decide to replace the siphon, you will need to buy such a product. At this stage, you need to check the quality of the product and make sure that the kit is complete. The following should go in the kit:

  • outlet nozzle;
  • rubber spout gasket;
  • a pair of nuts made of plastic;
  • rubber cuff of a cone shape;
  • stainless steel clamping screw (use brass and steel screws not);
  • installation cuff made of plastic with a skirt;
  • stainless plum cap;
  • the body of the product;
  • drain pad made of silicone plastic or oil-resistant rubber; use a polyethylene gasket when installing a siphon under the sink is strictly prohibited;
  • a drain plug made of rubber;
  • a siphon plug with a rubber gasket, comes complete with a bottle trap only.

During the installation of the siphon, corrugated or rigid pipes are used in the sink. The first are easier to work with, but they can only be used in case of installation under the bathroom or under the sink in the bathroom, for kitchen sink it will not work. The kitchen sink has the largest number of different inclusions, which will intensively settle in the internal hollows of the pipe. And to damage the corrugation, located next to the trash can and various kitchen utensils, is very easy.

When installing the siphon yourself, you will not need any tools. However, for greater confidence, it is better to prepare the following:

  • screwdriver;
  • sealant.

Installation of the siphon under the sink is performed using a semi-liquid or plastic sealant. The silicone composition has the best characteristics. He's the least expensive. It is important only to ensure that the sealant is not acidic. To do this, squeeze a little stuff and smell it. If it has a characteristic smell of vinegar, then this sealant is acidic and it can not be used. An agent suitable for plumbing should not have absolutely no smell or may have a subtle and unsharp color.

Preparing for replacement

Siphon with a drain

Scheme of a siphon with a drain.

Before buying a new siphon, be sure to measure the diameter of the spout of your already installed sanitary ware. It is desirable that the new siphon should have the same landing.

In case you can not find a suitable product, you will have to buy a transitional cuff. Also you can buy a special siphon with a stepped end of the spout, it goes to all 3 sizes. It will be necessary to trim the excess and separately buy the lower seal.

Immediately, together with the siphon, buy the sealing cuff. Check its strength and elasticity, see how it will sit on the spout. Refuse to purchase a siphon, which has large burrs on the pruning of the spout. They will interfere with the cuff. Such a defect indicates a low quality of the raw materials.

The entire preparatory stage is reduced to the dismantling of the installed product and the mandatory cleaning of the sewer pipe.

When cleaning, you can not especially try: the cuff is designed for fastening in a rough nest.

Some complications may appear in the event that the replacement of a Soviet-made cast-iron product, embedded in a branch pipe in cement mortar, is being carried out. Then you will need to arm with a chisel and a small hammer. Only with their help will it be possible to get rid of the old cast iron and to clean the branch pipe of cement residues. It is important to make sure that there are no fragments of cement left in the pipe, in the future they will permanently lead to the formation of blockages. Select fragments with pliers or tweezers.

Step-by-step instruction

The process of replacing this plumbing product can be considered both easy and difficult. It's simple because the sink and the spout are in direct reach. Difficulties can arise only if the siphon has a rather complex structure. For example, for a washing machine you need a product with an additional nozzle. In the case of work in the kitchen, which is equipped with a dishwasher, you need 2 pieces. Double sink requires a suitable siphon with a double sink.

Mounting dimensions of the siphon for the sink

Scheme of installation dimensions of the siphon for the sink.

In the houses of the new construction, the sewer pipe is located on the wall and goes straight into the riser. In these apartments there are several risers. In this case, the siphon outlet will not be directed downwards, but sideways or even backwards.

Check the drain grid in the sink. It may well be that the sink is too small stamping. And this is very bad, because around the protruding grid will be formed a pool of water, which quickly becomes a hotbed of all kinds of infections. Therefore it is better to immediately negotiate in the store about the possibility of replacement. If it does not work out, you can try installing the grid on the sealant, without gasket.

Place the cuff in the sewer pipe. Pre-grease it with a sealant. Make sure that the mounting surface of the nozzle remains dry. Inspect the docking surfaces of the housing threads. Take a sharp knife and remove the burr and burrs. Using the same knife or shabrovki make chamfers about 1 mm. If necessary cut into the size and outlet end of the drain pipe, and then wind in the cuff and fasten.

Если для крепления будет использоваться хомут, вам потребуется отвертка, с помощью которой вы затянете винт хомута. Расположите резьбовый конец выпускной трубы таким образом, чтобы он был направлен к колену или бутылке сифона. Если излив направлен вниз, необходимо будет насадить угольник на верхний конец выпускной трубы, используя при этом sealant.

Install the sink in the sink. At this stage, the bottom black rubber gasket should not be set. Next, you will need to put a ring gasket in the groove of the plug, lubricate the sealant, taking the root part of the thread by about 3 turns. Wrap the plug, then insert the valve into the siphon bottle outlet, if any.

Next you need to connect the bottle to the outlet pipe. To do this, take the tapered gasket and install it on the sealant with a narrow end to the bottle, then wind it into the bottle and point the side nut of the bottle onto the thread. Do not over tighten.

Уложите нижнюю сливную прокладку в канавку верхнего патрубка - опять-таки на sealant. Подведите решетки слива к сливному патрубку и несильно заверните верхнюю гайку бутылки. Затем, немного покачивая бутылку, затяните натуго верхнюю и боковую гайки. Если подключение стиральной и посудомоечной машин пока что не выполняется, их необходимо заглушить при помощи резиновых пробок. Удачной работы!

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