Overflow sink siphon

One of the elements of any plumbing fixture is a siphon, the purpose of which is to drain liquids into the sewer system and prevent the penetration of unpleasant odors from it into the room. The principle of operation of such a device is based on the creation of a water seal in a bent elbow or pipe, due to which all odors are cut off, but not water. The overflow siphon protects the sink, bathtub or sink from overflow by dumping excess water that reaches a certain level. Therefore, this device is so important in plumbing. How it differs from other similar designs, how easy it is to operate, and how to make it with your own hands - all this you will learn from this article.

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Overflow Cases

Overfilling a sink, sink or bathtub happens quite often. Such situations precede him:

• Intentionally closing the drain hole. In this case, overflow occurs if you forget about the included water, gaining a bath or a sink.
• Clogged drain hole (exhaust) or its accidental overlap.

In such situations, the overflow drain for the sink in the bathroom comes into operation. Water, having reached the mark at the level of which the drain hole is located, begins to merge through it, moving along the drain pipe into the body of the siphon. With normal functionality of the siphon (if it is not clogged), the drain of excess water will be provided.

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Varieties of siphons

Depending on the design features and purpose, all siphons used in everyday life are divided into several types.

Bottle siphon

Such a drain device got its name due to the external similarity of the main part with a flask or a bottle. From this part, the outlet and the drain pipe for the sink depart. The outlet is connected to the sewer, and the drain pipe is brought close to the drain hole of the equipment.

Important! Bottle type siphon is perfect for installation under the sink in the bathroom.

Benefits:

• The siphon can be quickly cleaned without completely dismantling it.
• An additional branch pipe can be attached to the bottle siphon, to which a drain hose from the washing machine can be connected.

Important! This type of siphon is also good because if a valuable thing (for example, jewelry) gets into the drain, it can be removed from the sump for the sink, since it is there, and not the sewer, that the product will first .

Disadvantages:

The disadvantages of this model can be attributed to a large number of compounds that increase the likelihood of leakage.

Corrugated siphon

This type of drain device is the easiest siphon option. This is a plastic corrugated pipe bent in the shape of the letter “S”. Fix it in this position with a clamp.

Benefits:

• Reduced risk of leaks due to a minimum of joints.
• The pipe bends and stretches well, so even if the sink is at some distance, the connection does not entail any difficulties.
• The easiest installation.

Disadvantages:

• Due to the fact that the inner surface of the pipe is ribbed, the siphon is quickly clogged.
• To completely clean such a siphon, it is necessary to completely dismantle it.

Important! You can also find a combined type siphon, when the bottle drain for connection to the sewer is equipped with a corrugated exhaust pipe.

Tubular Type Siphons

Such models are most often used for bathtubs, but they are also sometimes installed under the sink. The device consists of a curved rigid tube having the shape of the letter "U" or "S". Despite the fact that the siphon model is quite simple, its installation is more complicated, because unlike the corrugation, the pipe does not stretch.

Important! The disadvantage of this system is its overall size. The pipe takes up a lot of space under the sink, so if the space is small, it is better to choose another version of the drain device.

Flat siphon

Such a device has an unusual flat design. It is installed when corrugated or bottle devices are not suitable for installation in their sizes.

Hidden siphon

A feature of such a sink for a sink in the bathroom is its unusual location. It is located in a niche or inside the wall behind the partition and, thus, is completely hidden from view.

Important! Such siphons are installed near the sinks mounted on the wall or mounted in open places. This type includes siphons for sinks for a washing machine.

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Siphon Material

Modern drain devices can be made with various materials. Each of them has its advantages and disadvantages.

Plastic

There are few varieties of plastic that can be used as material for making a siphon: polypropylene and PVC. They are the most popular raw materials for such equipment.

Benefits:

• Inexpensive and easy to operate.
• Plastic is not subject to corrosion.
• It does not collapse from prolonged exposure to moisture and does not rot.
• It has a fairly high throughput due to the smoothness of the inner walls.
• No fat is deposited inside the product.
• Such devices can be used for installation on any plumbing fixtures.

Important! The disadvantage is the relative fragility - with direct mechanical impact, impact, such plumbing can crack, resulting in leaks.

Brass, Bronze and Copper

These are more expensive materials, respectively - draining under the sink in the bathroom will have a greater cost than a plastic product.

Important! Most commonly used under washbasins in bathrooms.

Benefits:

• Do not corrode.
• They have a beautiful appearance.

Disadvantages:

• Able to oxidize.
• They require electroplating or processing with special materials.

Stainless steel

A sink sump made of such a material is the most expensive product for this purpose. They are rarely used. The advantages of stainless steel siphons are many, one of which is an excellent appearance.

Externally Plated Metal Siphons

Sometimes you can find devices that are made of alloys or ordinary steel, coated on top with a decorative layer. A chrome-plated siphon looks great under the sink, although its cost is much higher than products from simpler materials.

Important! When choosing a siphon, special attention must be paid to ensure that it matches all the parameters of the installed plumbing fixture.

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Which sink siphon to choose?

When choosing this plumbing part, you must pay attention to the following points:

• Siphon dimensions. The most common are bottle devices. Therefore, if you have enough space under the sink, then such a siphon will be a good acquisition. If the space for such a device is sorely lacking, then it is better to buy a flat siphon. It is very compact, in addition, it is located in a horizontal plane.
• Convenience of service. Most often plumbing blockages occur in the kitchen.It is most convenient and quick to clean bottle devices, therefore it is advisable to install siphons of this type under kitchen sinks.
• The diameter of the neck of the plumbing fixture. This factor is also worth considering when buying a sink drain in the bathroom. A appliance that is suitable for a bathroom may not be suitable for a kitchen sink.
• If you plan to connect drain from other devices to the siphon, you should make sure that there are one or two input fittings in the device body.
• Pay attention to the siphon outlet. In cheap models, it is usually an ordinary grill. The more expensive ones are made in the form of pressure-type valves that can be adjusted.
• The presence of overflow. It is advisable to purchase a sink siphon with overflow. This will significantly increase the safety of plumbing fixtures.
• The diameter of the outlet pipe connected to the sewer pipe must correspond to the diameter of this pipe, or be smaller. In the latter case, an adapter is used during installation.

Important! If the pipe will have a larger diameter than the sewer pipe, then you will not be able to connect to the drain.

• Siphon cost. This factor is important for many. We want to assure you that even inexpensive plumbing products made of plastic are quite reliable and regularly serve for a long time, provided that they are properly maintained.

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Siphon installation

If you have an idea about how to assemble a drain device for a sink, then installation will not be difficult. Before installing a new device, you must dismantle the old siphon.

Procedure for dismantling the old siphon:

1. Shut off the water in the room.
2. Place a basin under the sink to collect draining water.
3. Remove the screw located in the center of the inlet of the sink.
4. Remove the old siphon.
5. To prevent third-party odors from entering the room, plug the sewer pipe with something.
6. Clean the inside of the sink to which the siphon rests.

Installation process for the overflow sink siphon:

1. Install a protective grill on the sealant or gasket in the drain hole.
2. Put the docking pipe together with the gasket at the bottom of the sink. Screw it to the grill with a long screw.
3. Put the union nut on the nozzle and then the conical gasket.
4. Put the body of the siphon on the nozzle and join them with a union nut. At this stage of installation, the height of the siphon is adjusted.
5. Insert the outlet pipe into the sewer hole, and then fasten it with the union nut through the conical gasket to the outlet of the housing.
6. Mount the overflow pipe. One of its ends goes into the sink, where it is screwed in its special hole. Connect the other end to the connecting pipe.
7. All connections must be checked for leaks by starting up the water in the sink.

Important! If it is planned to connect a washing machine to the siphon, it is necessary to prepare the hose coming from the washing unit to the siphon body beforehand. It should be long enough to be positioned along the wall or under the bath. The hose connects to the fitting on the siphon body.

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Stock footage

Siphon for the sink - a necessary part of the sewer system. A correctly selected element will ensure the safety of the plumbing device and prevent unpleasant odors from entering the room from the sewer. The best option is to install a siphon for the overflow sink. Installation of this device is quite simple. Following the instructions in this article, such a procedure can be carried out without problems yourself.