When performing repairs in the bathroom, the plumbing is often completely changed. In this case, you may need to connect the bath to the sewer. You can do this yourself, but you need to take into account the fact that a poorly connected plumbing object can leak, which will make itself felt with an unpleasant smell in the room. How to connect the bath to the sewer with your own hands correctly?
Preparatory work
When the dismantling of the old plumbing is carried out, and a brand new bath is waiting for connection, you should properly prepare for this. Sometimes you need to replace pipes and wiring, especially when remodeling the bathroom. It is important to understand the location of the pipes in order to make the connection more convenient.
When rearranging plumbing in places, it is important to draw up a detailed plan on paper. It should indicate the number and places of passage of pipes, as well as their joints.
Necessary materials
When connecting the bath to the sewer, the following materials should be in stock:
- prefabricated bath siphon;
- sealant;
- riser fittings;
- sewer pipe with a diameter of 10 cm.
There are several varieties of bath siphons, therefore, when buying, you must consult the seller.
Pipe selection
Today, heavy metal pipes are used quite rarely - they are prone to corrosion, heavy and bulky. They were replaced by modern polypropylene, or PVC pipes. It is important to use class B plumbing pipes. They have thick walls that are suitable for draining hot water, which is especially true if a washing machine is attached to the common riser.
Siphon selection
This plumbing fixture is key when connecting the bath to the sewer. Siphons come in two varieties - semi-automatic and automatic.
Semi-automatic siphons have a pipe design that connects to two bath openings. Such designs are also equipped with a stopper for clogging the bottom drain and a cable for attaching to the siphon.
Automatic siphons are molded from semi-automatic ones by the absence of a plug, which must be inserted and removed independently. They are equipped with an automatic valve, which is controlled by pressing.
Sewage system
Creating a scheme for connecting the bath to the sewer involves the following algorithm of actions:
- A rubber gasket is installed in place of the drain. For additional fixation, the joint can be coated with silicone sealant that does not allow water to pass through.
- The drain pipe is pressed firmly against the gasket and fixed with a screw or clamp.
- The overflow neck of the bath is connected to the drain using a plastic corrugation.
- The hose discharged into the sewer system is attached to the siphon using a union nut.
Connecting the bathroom siphon to the sewer does not require special physical effort. In addition, such a system does not need careful care, just following some recommendations of experienced plumbers is enough:
- Semi-automatic and automatic siphons have metal pads that periodically need to be cleaned to maintain an attractive appearance.
- It is important to periodically inspect the joints for leakage. If available, it is important to tighten the joints with clamps or replace leaky sealing gum.
- Siphon blockages must be removed with a small brush or plunger. When using aggressive agents containing acid, it is important to study their composition and instructions, so as not to damage the pipes.
In some cases, it is necessary to dismantle the siphon to thoroughly clean it.
Joining the riser
Any scheme for connecting the sewage system in the bathroom is not limited to attaching a siphon to the bathtub. It is also important to connect to a central sewer. To do this, follow some rules:
- The siphon must have openings that can drain the water.
- It is important to use the device, which is made of smooth and rigid pipes.
- It is necessary to abandon the use of corrugated elements for draining.
You can connect the siphon directly to the sewer pipe, or using a special adapter.
It is recommended to use silicone sealant for joint processing during installation, otherwise water may get under the bathtub.
If there is an unpleasant odor in the bath
Most often, dampness and stench can appear in the bathroom if the bath is not properly connected to the sewer. To eliminate an unpleasant odor, you must check the following points:
- When installing the siphon, you should take care of the presence of a water lock - a container with water, which will prevent the penetration of sewer odors. If it is not, then you need to replace the siphon.
- A water seal may not be present if the siphon breaks, in which case characteristic gurgling sounds will occur when the water is drained. A defective mechanism also needs to be replaced.
- An unpleasant odor may appear if ventilation is disturbed in the sewer riser. Unfortunately, this problem is difficult to solve on your own and requires the involvement of a qualified plumber.
It is recommended that you do not cover the hoods with dense materials that are available in every bathroom. Thus, the natural circulation of air is disturbed, its stagnation occurs and an unpleasant odor appears.
Also, the problem of smell from the sewer can be covered in violation of the integrity of the riser. This often happens in old high-rise buildings. It is important to attract qualified plumbers and eliminate the leak in time.
Mounting a bathtub
Before you connect the drain of the bath to the sewer, you must install this plumbing element. The methods differ depending on the material the bath is made of:
- The currently popular acrylic containers must be installed on a solid substrate of bricks, foam blocks or timber. In addition, ready-made kits with a metal casing are produced, which do not require separate fasteners.
- Metal bathtubs are fixed with foam. This is necessary in order to avoid deformation.
- Cast iron bathtubs are the most durable and often have adjustable legs on which the structure is mounted.
Regardless of the material of the bath, a decorative box is often erected around it. It is important to leave free access to the siphon, which sometimes requires cleaning, repair or a complete replacement.
Sink connection
In the bathroom, in addition to the bathtub or shower cabin, there is usually also a sink. How to connect the sink to the sewer in the bathroom?
To perform such manipulations, you will also need a siphon. It is significantly different from the one used for the bath, but their design is similar. It also has a water trap that prevents sewer odor from entering the room. Installation of a siphon for washing is carried out in the following way:
- A special rubber gasket must be placed on the rim of the sink drain hole.
- After that, a mesh is placed on it to hold large debris, its diameter should correspond to the size of the hole and the rubber gasket.
- Bottom is mounting the receiving pipe by tightening a special screw.
- After this, the siphon is mounted. To do this, you need a wide nut, which is twisted by hand.
- To connect the siphon to the sewer, a plastic corrugated hose is used. Usually it has a smaller diameter than the sewer pipe, so it is recommended to use a special adapter to connect.
All joints must be coated with silicone sealant. In addition, if the design of the sink does not imply the presence of a rubber gasket and it will rise above the level of the bottom, then you also need to use a sealant. Otherwise, there are risks of accumulation of water at the bottom of the sink.
Useful Tips
Experienced plumbers are guided by the following rules for connecting the bath to the sewage system:
- Siphon designs may vary, so before assembly it is important to fully study the instructions that came with the item.
- All plastic structures must be assembled by hand, since the use of coarse tools can damage them.
- Only after the final assembly, one end is connected to the drain of the bath, the other end to the overflow, and the third directly to the sewer.
In order for all joints to remain airtight, it is important to assemble them according to the instructions.
Accession of a bathtub to a water supply system
It is not enough to simply connect the acrylic bath to the sewer, it also requires a water supply system. In order to connect the tank to the water pipes, you must perform the following actions:
- Before connecting the mixer, it is necessary to install a shut-off valve in front of the coupling.
- The connection points are wrapped with special ribbons.
- There must be rubber or silicone gaskets inside the mixer; after checking their availability, installation of the structure can begin.
- It is important to screw the mixer immediately on both sides for uniform installation.
- Two tubes are attached directly to the mixer - for hot and cold water. They must be attached to the mixer and piping, respectively.
It should also be remembered that the recommended height of the mixer above the bath is 30 cm.
In addition, there are faucets that connect directly to water pipes without the use of additional hoses. When installing them, it is also necessary to use sealing elements to prevent leakage.