Installation of a siphon for a sink. How to properly install a siphon on a kitchen sink: assembly and installation tips

Frequent blockages, slow drainage of water, leaks and the penetration of sewer odors into the room - all this indicates that the kitchen sink needs urgent help. In most cases, such problems are caused by poor-quality installation or broken siphon. To replace it, it is not at all necessary to call specialized specialists from the utility service, since you can install a siphon in the kitchen yourself.

Types of siphons and selection rules

The functional purpose of siphons is, first of all, to protect against the penetration of unpleasant odors into the room from the intra-house sewer system. Despite the apparent variety of models, the principle of operation of the devices is almost the same. When used water is drained from various sanitary fixtures, part of it remains inside the siphon, forming a water plug that prevents the occurrence of extraneous odors and noise when using the sewer system. Similar products are presented in the following types:

• flexible corrugated S-shaped hose;
• U-shaped pipe structure;
• bottle-shaped element.

The main disadvantage of the design of the first two types of siphons is the lack of inspection, which greatly complicates the implementation of preventive maintenance during their maintenance during operation. Such siphons are most often used for washbasins in toilets and bathrooms. For kitchen sinks, it is considered more practical to use bottle-shaped products. Their collapsible body allows you to periodically clean the hydraulic seal container from accumulated food debris and fatty deposits on the walls of the siphon.

The determining criterion in choosing one type of bottle siphon or another is, first of all, the design of the sink itself. It may have an additional drain hole in the upper part of the side wall, which serves to prevent water from overflowing over the edge when the container is filled to the maximum. In this case, you should pay attention to siphons with an additional overflow pipe.

For double sinks, connection to sewer system may provide for one common or two separate siphons for each tank. Such designs are distinguished by somewhat complicated communication wiring.

Installing a siphon in the kitchen provides the ability to connect to it drain pipe a nearby dishwasher or washing machine. This additional option greatly simplifies the connection process household appliances to the sewer, so when choosing a suitable product, this point should also not be overlooked.

When selecting a siphon, the diameter of its drain pipe is of no small importance. The maximum possible size of the hole for a particular kitchen sink model will ensure faster drainage of recycled water and prevent frequent blockages.

Main components and components

Bottle siphons produced today have a fairly standard appearance and are a structure consisting of several main components.

1. Protective metal mesh with decorative nickel-plating.
2. Overflow pipe.
3. Additional outlet for connecting a dishwasher or washing machine.
4. Siphon body.
5. Outlet pipe for connection to the sewer system.
6. Silicone gasket that ensures the tightness of the threaded connection of the collapsible siphon body.
7. Union nuts.

In addition, the product includes flexible corrugated hoses, gaskets for union nuts and several metal screws for fastening.

The vast majority of such products are made from plastic. Therefore, before changing the siphon in the kitchen, you should make sure that all its components are intact. First of all, the product body should not have hidden cracks. This can be easily checked by pouring some water into its container. Also, attention should be paid to the notch of the thread of plastic parts, its relief, the absence of visible dents and burrs.

Installing or replacing a siphon in the kitchen requires some additional materials and tools necessary for work. In most cases, they are always at hand for the home craftsman:

• screwdriver;
• pliers;
• insulating tape made of polymer material;
• silicone sealant.

Despite the almost complete lack of water pressure in the kitchen sink drain system, many experts, however, strongly advise using a waterproof sealant specifically designed for the production of plumbing work. The composition must be used to treat all threaded connections of the product, as well as installed gaskets.

The use of sealant is a prerequisite for high-quality assembly of the siphon!

Assembly must be carried out in strict accordance and in a strictly specified order, determined by the attached instructions. In this case, you must adhere to the following recommendations:

• It is advisable to disassemble the assembled product to ensure that all parts and gaskets are present;
• there should be no dirt or burrs on the elements being connected that would prevent them from fitting tightly;
• When screwing the bottom cover of the siphon, you should not use excessive force, as this can easily break the thread or push through the included gasket.

To check the quality of the siphon assembly for leaks, you need to pour a small amount of water into it. If there are no smudges on the bottom cover, you can safely begin installing it.

Installation of the assembled siphon

In cases of replacing a previously installed product, its preliminary dismantling will be required. Before disassembling the siphon in the kitchen, you need to place some kind of container under the sink to drain the remaining water. Then, using a screwdriver, unscrew the fastening screw that holds the drain decorative grille at the bottom of the sink. After disconnecting the outlet from the sewer, the siphon can be finally removed.

To install a new device, the old one seat The kitchen sink must be thoroughly cleaned of dirt and grease deposits. You will also need to check the condition of the rubber sealing coupling on the outlet pipe of the sewer system, which, however, is recommended to be replaced with a new coupling. At the same time, preventive cleaning of the sewer bed itself will not be superfluous.

Installation assembled siphon is done in the following sequence:

• an outlet pipe is inserted into the drain hole of the sink, with a pre-installed rubber gasket, onto which a decorative grille is attached with a screw;
• from below, the outlet is tightly attached to the sink using a union nut;
• the assembled siphon is placed on the end of the pipe, after which the elements are connected into a single structure using a second union nut;
• if there is an overflow hole in the sink, it is connected to the corresponding outlet of the drain pipe using the supplied flexible hose;
• A corrugated outlet hose leading to the kitchen sewer system is connected to the outlet of the siphon, located on the side wall of the housing. To do this, use another union nut;
• at the final stage, a connection is made to sewer pipe through a transition seal coupling, since the mating parts have different diameters.

Upon completion of installation, perform an initial check assembled structure by filling the kitchen sink with water.

If the siphon has additional outlets for connecting household appliances, they must first be closed with special plugs!

If there are no leaks, proceed to connecting the drain hoses of the washing machine or dishwasher, after which the installation of the siphon can be considered complete.

The operation of a gravity sewer requires compliance with certain rules. When wondering how to properly install a siphon in the kitchen, you should take into account some nuances that are well known to professionals:

• a flexible drain hose leading from the siphon to the sewer pipe is installed to the minimum possible length, without unnecessary bends;
• the slope of a sewer bed with a diameter of 50 mm can be at least 0.03, that is, 30 mm for each linear meter pipes that will ensure normal water flow in the system;
• When connecting drain hoses from household appliances to the siphon, they must be additionally secured to the corresponding pipes with clamps. This precaution will prevent unexpected breakdown of the hose as a result of an increase in pressure created in the drainage system of operating equipment.

In conclusion, it remains to add that proper care and regular preventive cleaning of the siphon from accumulated contaminants will significantly extend its service life and eliminate discomfort when using the kitchen sink.

The kitchen sink is the most important and essential element of kitchen plumbing equipment. It consists of several parts, which, when connected together, provide the functionality of the sink. One of the components through which water is drained is the kitchen sink siphon. Regardless of your appearance and size, this plumbing element is designed to fulfill its main function - to protect the kitchen from unpleasant odors emanating from sewer pipes. In other words, what we have in front of us is a typical water seal, in which a curved tube is constantly filled with water. In addition, the kitchen sink drain prevents the drain from clogging with solid particles that settle at the bottom of the siphon.

Materials for making kitchenware drain device Polyethylene and polypropylene are used. The vast majority of products are made from them. These materials have the following advantages over bronze or brass siphons:

• less weight, which means that the sink made of thin-walled metal is not loaded;
• fat and other types of deposits accumulate on plastic less;
• corrosion and rotting from excess moisture completely absent;
• long service life of plastic siphons;
• the cost of such a device is quite affordable.

The siphon has an outlet pipe to which a corrugated or rigid drain is connected. It is better to choose a sink siphon with a large drain hole. A diameter of 40 mm will be sufficient. In contrast, the 32mm standard gets clogged faster, resulting in more frequent cleaning.

Important: To ensure the possibility of connecting hoses from a dishwasher or washing machine to the drain, it is recommended to choose a device that has additional outlets.

In addition to a siphon, you may also need it in the kitchen. In what situations is it necessary to purchase it, you will learn from our other article.

We also have information on how to do it yourself on our website.

When choosing, it is also advisable to choose a kitchen sink drain with overflow. This will protect you from overflowing the sink and flooding the kitchen. If the sink drain hole is clogged, then the water coming from the tap will simply go into the overflow hole, and from there into the sewer.

The photo shows a siphon for a kitchen sink with overflow

If the kitchen uses a sink that has two drain holes, then install. Its feature is the presence of another adapter with a grill, as well as an additional pipe connecting both drain holes.

Main varieties

According to their design, all siphons used for kitchen sinks can be divided into several types:

Components

Different types of siphons have different design, therefore, we will consider in detail the design of a bottle-type siphon, the most popular for installation under kitchen sinks.

Structurally, such a device consists of the following elements:

• body, usually dismountable;
• outlet pipe with raised rings, connected to the sink from below;
• protective mesh with a cell diameter of no more than 1 cm;
• connecting screw connecting the mesh and the pipe;
• corrugated or rigid tube for draining water into the sewer;
• cone gaskets designed to ensure tight contact between the pipes and the siphon body;
• wide rubber gasket for attaching the outlet pipe to the sink;
• rubber gasket designed to seal the protective grille;
• plastic union nuts. They attach the pipes to the device body.

Assembling a siphon for kitchen sinks

Let's look at the assembly of a kitchen drain using the example of its bottle type. The siphon under the kitchen sink is assembled in the following sequence:

• On the upper part of the siphon body, at the location external thread, put on a thin gasket large diameter. It will ensure a tight fit of the removable bottom cover to the body;
• The bottom cover, which has an internal thread, is screwed tightly;
• A union nut is put on the pipe that will be attached to the sink;
• From the bottom of the nut, a cone washer is put on the pipe with the blunt end. Depending on the level at which the cone washer is located, the depth of lowering the siphon under the sink is adjusted;
• The end of the pipe is inserted into the upper hole of the cone, after which the union nut is tightened;
• A drain hose is connected to the outlet on the housing. To do this, put a plastic nut on the hose pipe, and then slide the conical gasket with the blunt end. The hose pipe is inserted into the housing hole and tightened with a nut;

Installing a siphon on a sink

The work of installing siphon equipment is usually not difficult. It can be done independently. The only difference is the number of connections to one siphon. So, if you have a double sink or have another additional drain, then install a siphon for a kitchen sink with two bowls.

On preparatory stage check whether the siphon fits under the sink according to its dimensions. After this, the entrance of the sewer pipe is prepared for joining with the sink drain. If the pipe is cast iron, then a rubber plug with a hole is installed in it. Plastic pipes also connected via an O-ring.

Further installation of the siphon on the sink involves the following actions:

• A mesh is installed in the sink hole on a special gasket included in the kit;
• From the bottom side, a siphon is attached to the sink through a gasket, the outlet pipe of which is connected to the mesh using a long metal screw. Using a flat-head screwdriver or an ordinary coin, the screw is simply screwed into the pipe, in the body of which there is a built-in nut;
• The outlet siphon hose is connected to the sewer pipe;
• The device is checked for tightness. To do this, water is released into the sink for several tens of seconds. If there is a leak in any place, tighten the corresponding nut. If water flows between the sink and the protective mesh, it means that the gasket under the mesh is installed skewed.

Features of installing a siphon with overflow

If a siphon is installed for a kitchen sink with an overflow, then several additional steps are performed at the siphon assembly stage. The lower edge of the overflow pipeline is attached to the outlet pipe. Fastening is carried out according to the already familiar scheme, using a conical washer and a union nut. The overflow tube is connected during installation of the device on the sink.

The upper edge of the overflow tube is connected to a specially cut hole in the upper part of the sink, with its outside. The upper edge is secured using a screw connection on the sink side. The screw is simply screwed into the pipe using a screwdriver. Now, when a certain water level in the sink is exceeded, the water will flow directly into the siphon, bypassing the outlet of the sink.

Additional information on how to install a siphon in the kitchen correctly is presented in the video.

Even a beginner can handle installing a siphon under a kitchen sink without the help of a specialist. The designs of modern siphons are designed for manual assembly, and only in rare cases a screwdriver may be required.

A siphon is a pipe (rarely several pipes) with a bend that serves to drain dirty water into the sewer. It is thanks to the bend that a small part of the water remains in the pipe, forming a kind of sump. It, in turn, prevents unpleasant odors and noise from the sewer pipe from entering the room.

Siphon device

Siphons for drains are most often made of chrome-plated brass or plastic (propylene, polyethylene, PVC). Brass products oxidize over time and accumulate dirt. It is better to give preference to a plastic siphon. This product does not corrode, does not rot, it is wear-resistant and durable.

Let's look at the siphon device using an example plastic product. The standard siphon package includes:

Assembling a siphon for a kitchen sink

Each siphon purchased in a store or warehouse must be accompanied by instructions with a diagram of how to assemble the product. Assembly will not cause any difficulties even for those who have picked up a siphon for the first time. But to prevent leaks from occurring in the future, when assembling the product it is necessary to take into account following points:

Siphon installation

• When purchasing a siphon, you need to check the product for the presence of all parts of the device. It often happens that even in a closed package some parts are missing.
• When assembling the siphon, all elements must be dry and clean. Dirt or sand caught on rubber gasket or threads may cause leaks.
• When installing a siphon, the height of the siphon outlet from the floor should be an order of magnitude higher than the height to the inlet in the sewer pipe. If this condition is met, a certain slope is formed, favorable for water flow.

In the next article, read about: why is it needed and how to use it?

How to simply install the battery yourself and what is needed for this? Installing a pedestal sink - how to do it yourself

Even a beginner who is doing such work for the first time is capable of working in the kitchen. The designs of modern drainage systems are designed for manual assembly. Only in the most rare cases may a special set of tools be required to complete a task. Usually everything is limited to using pliers and a screwdriver.

What is a siphon?

Such plumbing structures are in most cases represented by plastic or metal pipe, less often several pipes of a specific, curved shape. Serves as a device for draining dirty, waste water, and small sewage into the sewer system. Due to the presence of a slight bend, the kitchen sink siphon leaves a small amount of water in the pipe, which forms a kind of sump. The latter prevents sewer noise, gases, and unpleasant odors from penetrating back into the room.

Scheme in the kitchen

To get a clear understanding of the assembly and installation of the siphon, let's look at its standard diagram. Plumbing fixtures are equipped with such elements as:

• The body is in the form of an elbow or a “bottle”.
• Outlet pipe.
• Drain pipe.
• Cuff.
• Plastic nuts.
• Insulating gaskets.
• Rubber plugs (lower and upper).
• Screw for tie.
• Decorative cover for the sink.

Manufacturing materials

Modern siphons for kitchen sinks with overflow are made mainly from polyvinyl chloride, chrome-plated brass or propylene. The most expensive - hardware. However, due to the comparative high price their purchase seems truly justified only from the point of view of prestige and aesthetics of appearance. From the point of view of practicality, durability and ease of use, plastic siphons for kitchen sinks with overflow are not inferior to the same metal ones.

A structure made of PVC is the cheapest option. Even with everyday use, such a siphon will last for at least 7-10 years.

As for propylene products, they are 15-20% more expensive than their PVC counterparts. With high-quality installation, such a siphon for a kitchen sink will last for decades. Unlike chrome-plated structures, chemically resistant, durable propylene can be cleaned with a metal cable or hook.

Drain pipe

The installation of a siphon for a kitchen sink suggests the possibility of installing corrugated or rigid drain pipe. It is better to give preference to the latter option, since small waste and pollution intensively accumulate on the internal hollows of the corrugation. In addition, a rigid pipe is much more difficult to accidentally damage with objects that are under the sink.

Sealant

To install a siphon for a kitchen sink, you will need a semi-liquid or plastic sealant. Optimal choice In most cases, an inexpensive silicone solution can do the trick.

Before choosing one or another sealant, you need to test it for acidity. You can determine how chemically neutral a substance is by squeezing a small amount out of a container and smelling it. If you notice a pungent vinegar smell, then the sealant is not very suitable for such work.

There are products on sale for insulating joints based on natural rubber. Such sealants are not cheap. However, their service life is at least several decades.

Connection settings

Standard connecting pipe sizes are 32, 40 and 50 mm in diameter. When choosing a siphon for a kitchen sink, you need to decide on the parameters old design. If you cannot find a product of the required size, you must resort to purchasing a special transition cuff.

Today there are siphons on sale that have a stepped spout end. The latter can be adapted to all sizes of pipes. You just need to carefully trim off the excess material and purchase a suitable seal.

How to assemble a siphon for a kitchen sink?

The structure is assembled on the basis of the attached instructions with a diagram of the product. When performing the recommended actions in a clear sequence, even a beginner should not have problems with the arrangement of the elements of the drain system. However, in order to avoid leaks, you need to pay attention to several important nuances:

1. During the assembly process, the main thing is to create the most airtight connections possible. Even when purchasing, the product should be inspected for defects. Special attention It is necessary to pay attention to the quality of the thread.
2. When installing connections, the gaskets should be securely fastened. For these purposes, a sealant is used. The drain system elbows are screwed in until they stop.
3. It must be borne in mind that in order to arrange the installation area decorative overlay Several gaskets are used. The black one is used for laying on the top of the pipe. The thinner one is white and fits under the overlay.
4. Once the kitchen sink siphon is completely assembled, it is recommended to get rid of any excess sealant that protrudes from the edges of the connections.

Preparation for installation

Having figured out how to assemble a siphon in the kitchen, you can move on to dismantling the old structure and cleaning the surfaces of the sewer pipe. When implementing a task, you should not attach too much great value the presence of residual contaminants on the surface of the drain, since a special sealing collar is designed to fit on a rough base.

Certain difficulties may arise when replacing a Soviet cast-iron siphon embedded in a pipe with cement mounting. IN in this case you will have to work hard to depressurize the connection using a hammer, chisel or chisel. This is required to remove old cement from the pipe and dismantle the old siphon.

When preparing a siphon for a double sink in the kitchen or a single container, you need to ensure that fragments of brittle cast iron and particles of cement do not remain in the sewer pipe. During operation new system such debris can turn into a source of regular blockages. It is convenient to remove all kinds of debris from a sewer branch with pliers and tweezers.

Installation

How to install a siphon in the kitchen? For reliable installation, work must be performed in strict sequence:

1. The installation collar, pre-lubricated with sealant, is placed in the sewer pipe. In this case, all surfaces must be dry.
2. The connecting (end) surfaces of the housings are checked threaded connections. If necessary, burrs are carefully cut off sharp blade, since their presence may damage the gaskets.
3. The end of the drain pipe is inserted into the cuff and securely fastened. If you have to work with a fastening in the form of a clamp, you will have to use a screwdriver to tighten it.
4. A drain grate is installed in the sink. The black bottom gasket is not yet installed.
5. A thin ring gasket is placed in the groove of the plug, which is generously lubricated with sealant. Next, the plug is screwed on. It is enough to capture the thread at a distance of about 2-3 turns.
6. If the siphon body is represented by a bottle-shaped pipe, it is placed special valve with an outward opening flap. The structure is attached to the exhaust pipe.
7. The lower drain gasket is placed in the groove of the upper pipe, and the nut of the siphon body is screwed in.
8. While slightly rocking the elbow of the structure, you should carefully alternately tighten the side and top nuts of the bottle.

Functionality check

When all activities aimed at assembling and installing the siphon have been completed, it is worth starting to test the drain system. To do this, water is supplied to the sink under maximum pressure, which allows you to test the tightness of the connections. The absence of leaks indicates that the work was done correctly.

When choosing siphons for Blanco sinks for the kitchen or considering them as suitable option any other product, it is worth checking the system once again for the presence of all structural components. Unopened packages often do not contain enough fasteners necessary for successful installation.

When assembling and installing the siphon, all parts must be clean and dry. One of the main reasons for leaks is dirt and sand getting on rubber gaskets.

The siphon must be installed in such a way that its outlet is located an order of magnitude higher than the inlet opening of the sewer drain pipe. Compliance with this requirement allows the formation of a certain slope, which becomes a favorable basis for the formation of free flow of water.

Operation and Maintenance

Proper installation of a kitchen sink trap is an extremely important task. However, quality drainage system maintenance is also important. Timely cleaning contributes to the longest possible operation of the structure.

To dissolve deposits in the form of fatty masses, the use of caustic soda is recommended. Improves throughput systems periodic, continuous flushing of pipe connections under pressure hot water. In case of significant blockages, it is worth using special chemicals for cleaning sewer pipes.

The simplest way to remove plugs in siphon connections is to use a regular plunger. If after several movements the garbage does not pass through the sewer, it is worth disassembling the structure and washing its individual elements. If you have a plastic siphon, you can get rid of the blockage using a metal wire with a slight thickening at the end. Similar methods Pipe cleaners are widely used by plumbers.

If there is a persistent sewer smell in the kitchen or a leak has formed in the siphon design, it is worth doing do-it-yourself repair systems or resort to the help of specialists. At the same time, we should not forget about the need to remove the old sealant and apply a new one.

In conclusion

The siphon is an important plumbing fixture in both the kitchen and bathroom. Therefore, it is advisable that any actions that we described above in the article are performed by trained specialists, which will guarantee reliable and durable operation of the system. However, if you have some experience or in case of emergency, you should use the above recommendations to carry out the work yourself.

Installing a siphon with your own hands is such a simple operation that there is no point in inviting a master plumber to do it. Siphons of modern design are designed to be assembled by hand; only in some cases a screwdriver may be needed. A miniature LED flashlight is also useful for illuminating hard-to-see places.

However, the work of installing a siphon is dangerous, and for good reason: you will have to clean the sewer pipe and keep it open for some time. To prevent the siphon from becoming a source of trouble in the future, you need to use quality materials and strictly follow the instructions for installing the siphon.

Precautions

Fecal water and sludge are very toxic and chemically aggressive substances; Sewer gases are also explosive. The danger is compounded by the fact that toxic substances can enter the body through intact skin.

Mainline plumbers are well aware of this and do not neglect safety precautions. Domestic plumbers rarely have to deal with large masses of toxic substances or gas emissions from a pipe, but in each such case the consequences are severe precisely because of the neglect of safety precautions.

Apartment residents have nothing to fear: the water seal in the siphon elbow reliably locks the pipe outlet. But when replacing the siphon, its pipe will be open, and you will have to work with your hands in the immediate vicinity of the sludge deposits and clean it off. Therefore, stock up on latex gloves, a plastic apron and a petal respirator. If suddenly you experience that same 1 in 10,000 cases, it will do no harm.

Siphon material

Drain siphons are mainly made of chrome-plated brass, PVC or propylene (polyisopropylene). Brass ones are the most expensive; their use can only be justified from the point of view of aesthetics and prestige. Otherwise, they are inferior in all respects to plastic siphons, including durability: if accidentally hit, a plastic siphon will come loose or be dented, while a brass siphon may break or twist out of the pipe.

PVC is the cheapest and has the least hydraulic resistance. But with regular draining of hot water, a PVC siphon lasts 5-7 years. Propylene siphon is 5-20% more expensive than similar PVC, but correct installation will last for decades. Hydraulic resistance for a siphon does not play a big role, and durable and chemically resistant propylene can be cleaned many times with a hook or cable, and the miasma from the pipe will not corrode it. Propylene is especially good for acrylic bathtub: their coefficients of thermal expansion are almost equal.

When purchasing a plastic siphon, be sure to check its completeness and quality:

1. Outlet pipe. The threaded insert must be metal.
2. Rubber gasket of the outlet pipe (spout).
3. Two plastic nuts with a diameter of 32/40/50 mm.
4. Conical rubber cuff with a diameter of 32/40/50 mm.
5. Installation cuff with a soft plastic skirt with a diameter of 32/40/50 mm.
6. Stainless steel clamping screw. Brass, even chrome plated, will turn green, but plain steel will rust with any coating.
7. Decorative drain cover. Also made of stainless steel.
8. Drain gasket. Material: oil-heat-resistant rubber (white) or silicone plastic. The polyethylene gasket is rejected without hesitation.
9. Siphon body (bottle or elbow).
10. Bottom siphon plug with rubber ring gasket. Only for bottle siphon.
11. Rubber drain plug.

Drain pipe

Drain pipes are used rigid or corrugated. WITH corrugated pipe It’s easier to work, especially under the bathtub, but the corrugation is not suitable for a kitchen sink: sludge accumulates intensively in the internal hollows of the corrugation (the kitchen drain is the dirtiest) and the corrugation inside kitchen cabinet in the vicinity of a bucket or other objects it is easier to damage.

Sealant

When installing a siphon, you will need a plastic or semi-liquid sealant. The best in terms of properties and inexpensive is silicone. You just need to make sure that it doesn’t turn out to be acidic. The test for chemical neutrality is very simple: squeeze a little and smell. If it smells like vinegar, it’s no good, it’s acidic. A sealant suitable for plumbing should either have no odor at all, or the odor should be weak and not pungent.

Occasionally, sealant based on natural rubber (“Germeplast”, etc.) is found on sale. It looks like grayish or yellowish sticky plasticine. Very expensive, but the quality is indicated only by the estimated service life: 70 years. If necessary, the connection can be depressurized and the sealant can be reused.

Connection dimensions

The connecting dimensions of the sewer pipes are 32, 40 and 50 mm. Before buying a siphon, you need to measure the diameter of the old spout, and it is advisable to take a new one with the same fit. If there is no suitable siphon the right size, you will have to buy a transition cuff. Siphons with a stepped spout end are also available for sale in all three sizes. The excess is cut off, and the lower seal is purchased separately.

In the last two cases, the sealing collar must be purchased immediately, while the siphon is in your hands, and immediately checked how it fits on the spout, how elastic and durable it is. A siphon with large burrs on the edge of the spout that prevents the cuff from seating should not be taken: this indicates low quality plastic. The manufacturer is most likely “alternative” and produces general-purpose PVC plumbing fixtures.

Preparatory work

Preparation for installing a siphon comes down to dismantling the old one and cleaning the inner surface of the sewer pipe. Carrying out last operation, you shouldn’t bother too much in the mud: the material (special rubber) of the cuff is designed to fit into a rough socket.

Difficulties may arise if the Soviet cast iron embedded in the pipe on cement is changed. In this case, you will have to work with a 50 g hammer and a chisel or chisel to tear out the old monster and remove the remaining cement from the pipe.

Attention: Remember that you are working with brittle cast iron. And make sure that cement fragments do not remain in the pipe, they will become a source of permanent blockages. It is convenient to remove debris from the pipe using tweezers or duckbill pliers.

Kitchen

Installing a siphon in the kitchen is both simple and complex. Simple - because the pipe and sink are quite easily accessible. Difficult - because the required kitchen siphon can be quite complex design. A washing machine requires a siphon with an additional fitting. If the kitchen also has dishwasher- with two. For a double sink, you will need a siphon with a double drain.

In addition, in new houses the sewer pipe is located on the wall and goes directly into the riser; In this case, there are several risers per apartment. From the point of view of sanitation and hygiene, this is excellent, but the release of the siphon will no longer go down, but back or sideways. Some types of kitchen siphons are shown in the figure; Using the diagram on the left you can calculate the size of the free space for the siphon.

Instructions for installing a siphon in the kitchen

• Check the fit of the drain grate in the sink sink. It may turn out that the stamping in the sink is too shallow. This is unacceptable: the puddle around the protruding grille will quickly become a breeding ground for infection. In such a case, it is advisable to agree with the seller about a replacement when purchasing. As an extreme option, install the grate without a gasket, on a sealant.
• We place an installation collar lubricated with sealant into the sewer pipe. The installation surface of the pipe must be dry.
• We check the end (joining) surfaces of the body threads. With a sharp knife we cut off burrs and flash (they can damage the gaskets) and use it or a scraper (reamer) to remove chamfers of 0.5-1 mm.
• If necessary, cut the outlet end of the drain pipe to size, insert it into the cuff, and secure it. If the fastening is with a clamp, you will need a screwdriver to tighten the clamp screw. The threaded end of the outlet pipe should face the body of the siphon (bottle or elbow).
• If the spout goes down, place a square on the upper end of the outlet pipe on the sealant.
• We install a drain grate in the sink sink. We are not installing the bottom black rubber gasket yet.

• We place a thin ring gasket in the groove of the plug and lubricate it with sealant, covering the root part of the thread by 2-3 turns. We wrap the cork.
• Insert a valve into the outlet pipe of the bottle, if provided. The valve flap must open outwards.
• We connect the siphon bottle to the outlet pipe: place a conical outlet gasket on the sealant with the narrow end to the bottle, insert it into the bottle, and screw the side nut of the bottle onto the thread. We don’t tighten it too tight.
• We place the lower drain gasket in the groove of the upper pipe of the bottle on the sealant, bring it to the drain pipe of the drain grate, and loosely tighten the upper nut of the bottle.
• Rocking the bottle slightly, alternately tighten the top and side nuts of the bottle tightly.
• If the fittings of the washing machine and sink are not yet used, we plug them with rubber plugs, complete or suitable in size. Otherwise, we simply pull the drain hoses onto them.

Note: The work of installing the siphon must be done in one go, while the sealant is fresh. The sealant retains its plasticity, but if you move the joint just an hour after its application, the connection will be unreliable. When washing the drain grids twice, both are installed at once, and three nuts will have to be finally tightened.

About the valve

In the event of a flood, even an unkempt, slimy valve saves the apartment: it gets the job done spring cleaning, not repairs. But the valve becomes overgrown with sludge, so the siphon with the valve must be periodically disassembled and cleaned. That's why:

1. On the top floor, or in new houses with separate risers, the valve is not needed at all: there is no one to fill it and/or it is impossible.
2. In 97% of cases, when the sewerage system is unbroken, the first floor is flooded. Here the valve is necessary in any case.
3. In other cases, be guided by the neighbors BELOW: how neat, respectable and prone they are to illegal amateur activities, such as installing a catcher pin in a riser.

Bath

Installing a siphon on a bathtub begins with installing the overflow. The work is greatly simplified if the overflow pipe is corrugated. If the overflow pipe is rigid, you will first have to measure the length of the overflow pipe as carefully as possible and select a siphon along it. A drawing and assembly diagram of a bath siphon are shown in the figure.

With a non-standard bathtub, adjustment will still be required, but the threads on the ends of the overflow pipe are made with a small margin, which will be enough. However, when installing a new siphon, you will first have to install it “on a live thread” without sealing, and also install an overflow grille. After this, accurately fit the overflow pipe into place and then assemble it completely. Considering that you will have to work in a tight, dark space “in a supine position” and often with one hand, and the bathtub overflow almost never gets clogged, the choice of a bathtub siphon is clearly decided in favor of a design with a corrugated overflow.

Instructions for installing a siphon with a corrugated overflow on a bathtub

• We assemble the overflow immediately “to its fullest”, with sealing and tight tightening of connections, except for the lower end; Let him hang out in the air for now. Assembly is similar to a kitchen sink drain. We place the conical gaskets with the narrow side towards the union nut. Conical response mounting surface under them can be easily felt with a finger.
• We also completely assemble the drain, bottle and outlet. The technology is “kitchen”, the only difference is in the configuration of the parts and the tee for the overflow, inserted between the bottle and the drain, and in the absence of additional fittings.
• Connect the overflow. Here you also need to pay attention to the lower conical gasket: narrow end– towards the union nut and/or mating conical surface.
• After a day (we are not using the bathtub yet), we completely fill the bathtub ourselves. hot water, check for leaks and overflow operation.

Wash basin

After the kitchen and especially the bath, installing a siphon for the washbasin is child's play. One drain, no fittings - but no frills.

Bottom line

The siphon is the most important plumbing fixture. The malfunction of this simple device will lead to the appearance of an invisible, but very harmful infection in the apartment. Therefore, when installing the siphon, you need to carefully seal and tighten the threaded connections tightly, in several stages with rocking.

Video: assembling a siphon for a sink