Any owner of a living space who has encountered at least once in his life the services of plumbers and their prices knows that the ratio of the complexity of the work performed and payment is significantly skewed towards the latter. Therefore, many owners prefer to install plumbing equipment themselves, and one of the simple jobs that can save considerable money is connecting the toilet to the sewer.
Despite its apparent simplicity, connecting a toilet to a sewer pipe requires knowledge of the technology of work, which takes into account the design features of the equipment, the spatial arrangement of the pipeline, and the parameters of the inlet and outlet pipes. In addition to the classic models, wall-hung toilets have appeared on the plumbing equipment market, the installation and connection of which to the sewer system is much more complicated, but practically doable by any competent owner if he has the necessary power tools, the ability to read simple drawings and strictly follow the instructions.
Rice. 1 Toilet bowl shapes
Types and designs of toilets
Toilets sold in the retail chain differ from each other in a significant number of parameters; they are conventionally divided into the following groups according to:
- bowl shape: plate-shaped, funnel-shaped, and visor-shaped;
- type of flush: straight (horizontal, cascade), straight circular or swirling circular;
- placement: floor and suspended structures;
- location of the tank: together with the bowl or placed upward, behind the false wall (equipment with installation);
- water supply: right-handed or left-handed;
- materials of manufacture: porcelain, earthenware, stainless steel, glass, stone, plastic and exclusive options made of gold.
Rice. 2 Types of flush
Reviews
Vasily, Salekhard : “The bathroom was renovated. When the new tank was installed, all the hoses were replaced. We settled on a corrugated pipe. It was not difficult to let her down. We were attracted by the service life and material (stainless steel). 3 years have passed. It doesn't leak anywhere. I'm pleased."
Andrey, Krasnodar : “When 2 years ago the old pipe rusted and started leaking, we had to change it. There is not enough space for the toilet. Connecting communications is inconvenient. A reinforced flexible hose came to the rescue. Installing the side water supply to the toilet took 15 minutes. There was no leak. I took it in a metal braid, the fitting nut was made of brass.”
Types of releases
The distinctive features listed above, with the exception of models with installation, do not affect how the toilets are connected to the pipeline, in contrast to the outlet designs given below.
Vertical
The outlet pipe in this modification is located at the base of the housing and goes into the floor - this arrangement after installation of the device differs from other designs in its aesthetic appearance and ease of use of the room (the floor can be washed under the tank).
Vertically located sewerage system under the toilet is popular in Western Europe and the USA; in ordinary city apartments, its implementation involves a large amount of work and is technically difficult due to relatively thin floor slabs, in which it is difficult to hide a thick sewer pipe with an outlet.
Theoretically, a vertical outlet can be made in any apartment building on the ground floor, where the pipeline will not damage the ceiling of the lower apartment, but in a private house such installation is much easier to implement due to the minimum number of restrictions.
Rice. 3 Types of toilets by release
Horizontal
Connecting a toilet with a horizontal outlet is convenient because it allows you to move the device close to a false wall in order to save free space in the toilet. The drain pipe for the toilet is located behind the wall and is directly connected to the riser.
During installation, a rigid pipe with an internal cuff comes out of the wall at the required height, and the device is moved back, pushing the toilet outlet into the pipe coming out of the wall.
Oblique
Bowls with an oblique pipe located at an angle of 140 - 145 degrees to the horizon are connected to the riser at floor level; the advantage of this design is the absence of stagnation of wastewater in a pipeline placed at an angle. The detailed connection of the toilet is universal thanks to the use of an external flexible corrugation, which can be connected to the sewer in different positions and distances from the plumbing fixture.
Rice. 4 Toilet connection diagram - example
Article on the topic:
Shut-off valves for a toilet with bottom supply - device, selection, installation . In the article you can learn about the design of a typical toilet cistern, the operating principle of the shut-off valves, and also how to install them.
Hanging models
Recently, hanging varieties with installation have become increasingly popular, the connection methods of which involve hanging the bowl on a false wall and placing a cistern behind it. To do this, a strong metal vertical frame is mounted behind the wall, threaded studs with nuts are removed from it to hold the bowl, and a plastic drain tank is placed inside the frame; a button is placed on top of the wall to turn on the flush.
The advantages of a hanging design are space saving in a small toilet, aesthetic appearance, ease of cleaning (the floor is easier to clean under a hanging bowl).
Connection tool
As noted above, installing a toilet in a sewer is not particularly difficult if you have the appropriate tools and components; for installation you will need:
- A wrench or adjustable wrench for screwing fastening hex bolts and flexible connections to a ball valve on a water supply system.
- Metal saw – needed for cutting polyvinyl chloride (PVC) pipes to the required size with rigid fasteners.
- A hammer drill with drills of a suitable diameter for tiles and concrete is necessary for attaching the bowl to the floor.
- Fittings, flexible connection to the toilet for supplying cold water.
- Dowels and hexagon screws, fasteners are usually included with the new device.
- Pipes, corrugations, eccentrics, cuffs, adapters and other shaped elements with which the toilet is connected.
How to replace eyeliner
When replacement is necessary
It is necessary to change the hose if:
The flexible line broke. Breakage of the braid or rupture of the internal hose will lead to the formation of a leak and, as a result, flooding of the room. The causes of leakage may be high pressure in the system or mechanical impact;
Loss of tightness of the connecting hose
A flexible hose leak was detected at the junction with the mixer or water pipe. The causes of leakage may be natural wear of the gasket or a crack in the fitting (nut).
Leak at the hose connection
Methods for connecting a toilet to a sewer system
Any user who independently installs plumbing equipment has to choose the appropriate connection of the toilet to the riser from a variety of options, while the determining factors during the work are the type of outlet, dimensional parameters and spatial location of the sewer inlet pipe.
Rice. 7 Connecting a toilet to a sewer with corrugated plastic - examples
Using corrugation
Connecting a toilet to a sewer with corrugated pipes is one of the most common options due to its low cost, the absence of problems with the alignment of the joined pipes, and the ability to stretch and bend. Most often, corrugations are used to connect a toilet with an oblique outlet to the sewer system, this is due to the fact that waste is less retained on inclined walls and blockages occur less frequently.
To connect the toilet to the sewer system with corrugated pipes, carry out the following operations:
- Insert the corrugation into the sewer outlet, covering the cuff with silicone grease, and then place the assembled toilet in the toilet in the intended place.
- Connect the corrugated pipe to the plumbing in such a way that there are no strong transverse distortions, then fill the tank with water and monitor the drainage. In case of leaks, adjust the position of the bowl and corrugation until there are no drops from below.
- Slightly lift the bowl and stick pieces of masking tape under the mounting holes, return it to its place, once again check the accuracy of the location, and use a construction pencil to mark the mounting points on the paint.
Rice. 8 Types of connecting shaped products
- They sit on the bowl and check its stability; if the tiles are uneven, draw a marker around the base around the perimeter and then look for a suitable waterproof lining material underneath. They can be strips of linoleum, a backing for laminate flooring, a rubber mat; plumbers often use sealing silicone during the installation process (they coat the bottom of an inverted bowl with it).
- The toilet bowl is removed, placed on the substrate and cut along its contour, the marked holes in the tile are first drilled with a feather drill, and after passing through the tile layer, they are deepened with a Pobedit concrete drill in perforation mode.
- Drive in the dowels, place the toilet on the workplace (if using a backing, place the device in the oval previously described with a marker) and screw it with hex bolts using a wrench, and put decorative caps over the caps.
- The second end of the corrugation is inserted into the outlet, a flexible water supply is connected to the tank, the functionality and presence of leaks are checked, and the position of the corrugated pipe is adjusted if necessary.
Rice. 9 Installing a toilet in the sewer using polymer elbows
Related article:
How to connect a kitchen faucet to a water supply using different types of pipes . If you don’t know how and how to connect a sink in the kitchen, be sure to read a separate article on our website. It explains all the details in great detail. tools, types of connections for different pipes and mixers.
Plastic knees
If there is no alignment of the joined horizontal holes, the work becomes more complicated and requires higher plumbing knowledge and skills in the use of rigid corner elements or rubber eccentrics.
Connecting a toilet to a sewer system made of plastic pipes using rigid polymer elbows is optimal in terms of channel permeability, preventing blockages and reducing hydraulic losses.
To connect a toilet to the sewer with your own hands, which has a horizontal outlet, using polyvinyl chloride elbows, proceed as follows:
- Purchase two standard corner elbows with outer diameters of 110 mm and sockets with an internal elastic ring.
- Connect the inlet parts to each other in the shape of the letter Z and insert the assembly into the outlet socket of the sewer pipe, move the bowl towards the assembled elbow and place its outlet into the socket with an internal rubber ring.
- Typically, standard bowls have an outlet with an outer diameter of 102 mm - 105 mm, and the elbow socket is designed to connect to a pipe with an outer diameter of 110 mm. To seal this gap to approximately 7 mm, an intermediate cuff is placed on the outlet. Its internal diameter should be about 100 mm with a wall thickness of at least 5 mm.
- The connecting unit is assembled using a soap solution or silicone grease to lubricate the rubber rings.
Dismantling old elements
Before connecting the toilet to the sewer pipe, the installation site should be cleared of elements of the previous structures. The procedure is carried out using a hammer, screwdriver and pry bar.
In most cases, the outlet of old products is built into a cast iron structure (“elbow”), which requires breaking the pipe with a hammer. When performing this procedure, be sure to wear safety glasses. Otherwise, sharp ceramic shards will get into your eyes, causing injury.
After the old plumbing fixture is dismantled, you need to knock on all sides of the cast iron pipe, then begin to remove the cement layer and other deposits from the walls.
To remove small parts, a screwdriver and a hammer are enough, but for large elements you will need to use a pry bar. When tapping with a hammer, it is important not to overdo it, because... strong impacts will lead to the splitting of the cast iron socket.
In this case, you will need to break the floor to get to the sewer riser. Then you will need to connect the new outlet to the riser.
When the main deposits have been removed, you can begin the final stage of cleaning the pipeline. To do this, you need to coat them with a special chemical for cleaning the toilet, and then scrape off the residue using a wire brush.
Finish cleaning with a rag. The first 5-6 cm of the cast iron socket must be completely smooth from the inside, because the absence of leaks in the future and the tightness of the joint depend on this. The entire procedure must be carried out wearing protective gloves.
If the sewer pipe is on the side of the toilet
Sometimes situations arise when connecting a toilet with a direct or oblique outlet is technically impossible to do under its tank, and the sewer outlet is located on the side. The problem is not insoluble; the problem is solved by using 90-degree corner bends. You can use standard products for installing internal sewerage in the form of short pipes; a more practical option is to use a drain pipe designed to lead the riser outside (the roof).
The toilet drain pipe has a cuff at one end in the form of a membrane, which is placed over the bowl outlet, and the second end of the pipe is inserted into the sewer pipe; if the length is not enough, additional pipe sections are used.
Rice. 13 Connecting the toilet to the sewer from the side
Connecting and installing a toilet is easy to do with your own hands, saving significant financial resources; to carry out the work you will need ordinary household tools and a construction hammer. A more complex and labor-intensive procedure, which takes a lot of time, is if suspended modifications are mounted and connected with installation. However, thanks to numerous videos on the Internet, you can always learn how to properly connect a toilet - in the end, any owner without special plumbing skills can easily handle the job.
