Connecting the toilet to the sewer does not require special knowledge and skills, however, during installation, you may encounter difficulty in the form of a mismatch between the central axes of the release of the plumbing fixture and the sewer drain pipe.
Holes that are at different levels or offset to the side will help to connect the toilet cuff - eccentric or corrugated.
We will show you how to choose the right product and complete its installation. There are no particular difficulties, the main thing is to take into account the design of the toilet itself and follow the instructions below. To facilitate the task and improve understanding of the installation process, we supplemented the information with visual photographs and thematic video clips.
Classification of toilet cuffs
The cuff is a simple but necessary plumbing element responsible for the tight connection of the toilet to the sewer outlet. It is mandatory when installing any type of floor device. This means that when choosing a compact toilet seat and buying it, you must immediately purchase a cuff.
Parts available on sale differ in material of manufacture, diameter, shape, so before buying, you should find out some points of connection. For example, you need to know the diameter of the sewer pipe to which one end of the cuff will be attached. D 110 mm is standard, but deviations from the norm may occur.
Modern manufacturers of European sanitary products instead of black rubber of the “Soviet” type (pictured), which is still sold in stores, produce white parts
You should also clarify the type of toilet outlet and its diameter, since the second end of the cuff will be attached to it. Size mismatch possible.
The problem is solved using one of the cuff types:
- with direct connection - simple conical model;
- when connected with offset - combined with different sizes of outputs.
In difficult cases, when a toilet with a sewer outlet is at different levels relative to the floor or is displaced along the axis, it is easier to use a more elastic type of cuff - a corrugated pipe, which has two smooth tips and a flexible central part that can stretch, change its shape and length.
So, if we generalize all types of cuffs, then we can distinguish the following groups:
- straight smooth;
- angular smooth;
- conical;
- eccentrics;
- corrugated.
You can find combined species - for example, on the one hand smooth straight lines, on the other corrugated.
If necessary, when there is no suitable type of connecting element, it is possible to make one from two different parts, but with the condition that the tightness of the connection is observed
According to the material of manufacture, all cuffs are divided into two groups:
- Plastic. Suitable for modern models of toilets and plastic sewer pipes.
- Rubber. Used to connect to a cast iron pipe.
The color of the material says nothing; manufacturers usually produce white, gray or black products.
Selecting an outlet-oriented adapter
In addition to dimensions that are of paramount importance, it is necessary to take into account the design features of the toilet, namely the form of release.
It is of three types:
- vertical
- horizontal
- oblique.
Vertical release
In Russia, it is used extremely rarely, since the location of sewer pipes above the floor level contradicts such a device. The vertical outlet is designed for drainage to be at floor level, and the pipes themselves are sewn up in the ceiling or placed under the floor.
If you still need to install a toilet with a vertical outlet, then it is appropriate to use a straight short plastic sleeve of a cylindrical shape. Eccentrics or complex configurations are not required because a vertical-flush toilet is placed directly above the sewer drain.
The cuff seals the joint and at the same time disguises it. If the mounting location is in plain sight, it is recommended to select the part for the color of the plumbing, if inside the plumbing fixture - the appearance does not matter
Horizontal release
This option is much more common and is an element of the toilet, perpendicular to the wall. Ideally, it should be just opposite the inlet of the sewer pipe.
In this case, a smooth plastic sleeve of small length or an element with two cylinders at the edges and a corrugated middle is suitable.
If the house is old, and the pipes still have not changed (a rare case), then you will need a rubber cuff for the compact toilet, which is used to connect to cast-iron pipes. When the axes of the input-output are shifted in height, an eccentric is useful - either smooth or with a corrugated pipe.
If the distance to the pipe is significant, sometimes use a corrugation, stretching it to the desired length, and an eccentric for a more tight connection.
If the toilet bowl is in a comfortable position opposite the sewer inlet, but its outlet is different in diameter, then it is enough to purchase a short plastic cone-type element. Its feature is the difference in diameters from different sides. Suppose it is attached to the toilet outlet with an end with D 80 mm, and to the sewer - with an end D 110 mm
As you can see, when connecting a plumbing fixture with a horizontal outlet, various types of cuffs can be used.
Oblique release
Such toilets are also connected in different ways, depending on the location relative to the drain sewer.
The outlet is usually directed at an angle of 45 °, therefore, the toilet must be installed next to the pipe so that it is slightly lower
If the entrance / exit are located on the same level, it is better to buy a sanitary equipment with a horizontal outlet.
When connecting an oblique outlet, short plastic cylindrical elements are also suitable if the toilet is mounted next to the pipe, and longer products with corrugation, if the plumbing fixture is located at some distance from the sewer drain hole.
A rubber cuff is also necessary only in one case - if you need to attach the toilet to an old-style cast-iron pipe.
Installation instructions for various types of cuffs
The principle of fixing rubber or plastic, smooth or corrugated parts is similar, however, the process itself may differ in nuances - from choosing the place to install the toilet to using additional mounting methods. Consider three common connection options.
# 1: Install rubber seal
A rubber cuff is a short, tight element that is not pulled from the outside, but inserted into the socket of a cast-iron pipe. This is a kind of seal or gasket that creates a tight connection between the drain hole and the plumbing fixture.
In addition, it protects sanitary ware from chips and damage in case of unintentional violation of installation stability.
Procedure for installing the rubber cuff:
Image Gallery
Photo from
Step 1 - Choosing the O-Ring of the Right Diameter
Step 2 - installing the cuff in the cast iron pipe
Step 3 - preparing the toilet for installation
Step 4 - Replacing the Toilet
If the toilet outlet enters the socket freely, then a soap solution will not be needed. On the contrary, it is necessary to create a denser abutment.
To do this, they usually use the traditional modern method - a sealant is applied over the entire surface of the adjacent parts. After solidification, it forms a tight hermetic ring.
# 2: Rules for using the cam
The fact that you need an eccentric, you will learn at the stage of choosing a place to install the toilet. If the outlet of the plumbing fixture and the socket of the sewer pipe are not strictly opposite each other, a simple plastic connector is not enough. Axis displacement requires a curved part.
High-quality rubber or polypropylene eccentrics are sold in plumbing stores and can cost from 100 to 250 rubles, depending on the manufacturer
Before installation, it is necessary to put the plumbing device in place, measure the length to the sewer drain and once again make sure that the model of the eccentric for the toilet bowl is selected correctly. To check, you can simply put the part to both holes.
An eccentric can be used if the drain hole is just above the toilet outlet. If the height difference from the outlet to the socket is more than 5 cm, there may be problems with flushing - in this case, it is better to replace the pipes and install them lower
Work order:
- we clean the sewer inlet from old deposits;
- we put the cuff with a wide end (110 mm) on the sewer bell, coating the places of abutment with sealant;
- the second end is connected to the oblique or horizontal outlet of the toilet bowl, also using sealant;
- we make trial descent of water;
- if no leaks are detected, we fix the toilet bowl in a previously prepared place with bolts.
The problem arises when during installation it turns out that the eccentric is incorrectly selected. To avoid an uncomfortable situation, instead of a rigid structure, you can immediately buy a part with an elastic corrugated middle.
As necessary, an eccentric with an accordion can be slightly shifted to the right / left or slightly stretched, while maintaining its functional qualities.
A variant of the cascade use of eccentrics when the toilet model is incorrectly selected. If the pipes are located below, close to the floor or at its level, it is better to purchase a plumbing fixture with an oblique outlet
Moving parts are also relevant when there is a risk of fragile toilet fixation. Simply put, when you swing the plumbing fixture, the tightness of the rigid connection will immediately be broken, while this does not threaten the corrugation.
# 3: Installing the corrugated cuff
The code is difficult to install the toilet in connection with the wrong form of release or a complex arrangement of sewers, often use an elastic corrugated pipe. Its advantage is that it can easily change shape and length, therefore, suitable for almost all types of releases.
The only things to consider when buying are the diameters of the locking cylindrical ends. They can be 110 mm / 90 mm, 110 mm / 80 mm, etc.
It is the corrugation that is used for temporary installation of the toilet during repair, with strong displacements relative to the central axis of the inlet / outlet (instead of the eccentric) and during the installation of the plumbing fixture at a distance of half a meter from the drain hole
The principle of replacing or installing the corrugation is the same as other types of cuffs:
- removal of an old worn item;
- cleaning inlets from dirt and deposits;
- insertion of the sealant-treated end into the sewer socket;
- fixing the second end on the toilet;
- trial descent of water, elimination of defects.
Experienced plumbers recommend not stretching the corrugation to the maximum, since as a result of this, it loses elasticity and quickly fails.
It is better to choose a model of a larger length or try to move the toilet closer in the outlet. Another option is to buy a combination cuff, consisting partly of hard elements.
Adapter Mounting Tips
Before choosing a cuff, be sure to check the distance from the toilet outlet to the sewer pipe. Sometimes the installation process is violated only due to the fact that the length of the eccentric is 2 cm less than necessary.
If you choose a corrugated pipe, check the degree of elongation. Perhaps it will not be enough for a difficult case of connection or connection to a pipe located at a long distance
The elongated corrugation is prone to sagging, so additional fasteners will be required to give it a direct look. Sharp angles and strong bends are the causes of frequent blockages.
In addition to the length and shape of the cuffs, pay attention to the thickness of the walls. The higher this indicator, the longer the device will last.
Before buying plumbing, analyze the condition of the sewer system, and then you can choose the model with the desired type of release and decide on the installation scheme of the toilet.
The secrets of choosing and using plumbing cuffs can be found in the following videos.
Use for connecting a corner cuff:
Plumbing tricks when using adapters and cuffs:
The cuff mount is part of the installation process of the toilet. If you correctly decide on the choice of a connecting element, the installation of plumbing will not take much time and will not cause difficulties.
If you have any difficulties, we recommend that you seek help from specialists. Timely consultation before buying a cuff also does not hurt.
Do you have practical skills in installing, connecting a toilet and mounting a cuff? Please share your knowledge or ask questions on the topic in the comments. The communication unit is located below.