Lower water supply to the toilet: design and installation

07-03-2018

Sewage

Modern water supply systems are developing every year and as a result of this, designs appear on the markets that are significantly different from other, already familiar products. At the same time, the points of consumption deserve special attention, since it is they who combine several variants of technical solutions and it is for them that a new device comes out almost every year. Given this, the question of how to repair the toilet bowl with the lower eyeliner is quite common.

Amateur photos of the internal arrangement of a similar system with its location in the tank

Advantages and disadvantages

To begin with, it is necessary to say that in this article we will talk not about specific models, but about the general system. The fact is that usually no one is interested in what kind of inlet valve for a toilet with a bottom supply is used, and most often questions are asked about the design features and technical solutions. People want to know which product is best to choose and what are its merits.

Some constructions of this type of arrangement of the tank are very similar to products with lateral input, although they are considered less practical.

Benefits

First of all, it should be noted that such structures have a good appearance, since all the pipes are hidden. In this case, the toilet with the bottom water supply usually has a rather original shape and design.

Another version of the design with the lower input of water into the tank

Special attention is given to the fact that these systems are virtually silent. There is no nasty sound of pouring water that so annoys many users.
You also need to say that the toilet with the lower eyeliner is considered one of the most practical. This design has a high level of reliability and fails much less products with side entry.

Tip! Ceramics manufacturers usually do not equip their products with an internal tank mechanism. Therefore it is necessary to select it separately, based on the internal configuration.

At the side entry, there will always be visible pipes that spoil the appearance very much and sometimes interfere with the convenient location of the toilet bowl in the room.

disadvantages

The main disadvantage that has been identified with this design is the inconvenience of installation. This is also reflected in a process such as repairing a flush tank with a lower water inlet, as it may require complete removal of the product.

Some models of toilet bowls with bottom entry are also equipped with not very beautiful inlet valves, which means that the device itself should be chosen very carefully

The fact that such a system breaks down quite rarely deserves special attention. However, when this happens, it is much easier to make a complete replacement of the whole node than to change a single element. (See also the article Anti-Splash Toilet. Features.)

Some details of such structures can have an original appearance and their own features of work.

Typically, products of this type began to be used in Europe or America, which means that the first such products were manufactured according to the standards of these places. Given this, when installing by hand, you must immediately take care of the presence of all the necessary adapters or couplings. However, some of them may be unique or very specific.

Tip! Buying such a design for a particular product is best to make a purchase together and in the same store. So you can check the possibility of installation on site and immediately determine compatibility with a specific model.

The original appearance of such toilets sometimes involves the organization of a water supply through the seat itself, which is attached to the tank over the entire area

Installation and Repair

Considering that the automatics for the toilet cistern with the lower liner in our country is used relatively recently, many craftsmen have some difficulties with its installation and repair. However, it should immediately be said that there is nothing difficult in these processes, although it has certain differences.

Installation

First of all, it should be noted that all such products have their technical data sheet, to which the installation instructions are attached. If these documents are not included, then you should not purchase it. It is also important to mention that the necessary connecting elements and fasteners usually go to the toilet bowl itself.

Usually, only the pipe itself to the inlet valve is attached using keys, although sometimes they are also used to tighten the control nut on the ceramic itself.

Starting installation, you must first install the bottom of the toilet, fixing it in the desired position. Prior to this, it is recommended to check the correctness of the water supply and the length of the hoses. If the need arises, it is possible to alter the feed system in accordance with the product design.
In the next step, you will need to install the tank. It is at this point that the installation of the internal structure is made.

Some installation instructions contain detailed drawings of these structures, which is very helpful for self-assembly, since most manufacturers supply these parts in a partially disassembled form.

Usually, first install a fill valve for the toilet with the lower eyeliner even when docking the tank itself. For this fix sealed gum and adapters. Some designs assume that the inlet valve will also be mounted at the same time, but it all depends on the specific model.
All other elements are assembled according to the instructions and drawings in it. However, it should immediately be noted that at first it makes sense to completely disassemble the drain device and then reassemble it. This will allow you to independently verify the tightness of the connections and the level of clamping of the parts.

Tip! All elements of such systems are assembled by hand without the help of a special tool. However, this must be done in such a way that the connections are sufficiently dense.

Sometimes the water level labels on the product do not correspond to reality and often have to make adjustments yourself

Service and Repair

Usually, the biggest problem in setting up and maintaining such a system is how to adjust the toilet bowl with the lower connection. This is due to the fact that it has a fundamentally different design, although it is based on a float.

Holes that are not used to inject water into the tank should be closed with special plugs, but they are not always included in the delivery set of such mechanisms and they have to be purchased separately.

First of all, it is necessary to fill the tank with water so that its level does not reach the overflow hole or funnels by 1-2 cm. After that, adjust the float so that it, floating on the surface, closes the inlet valve at the inlet to the tank.

Repair of such products is not required for quite a long time. Therefore, it is sometimes much easier to replace an entire assembly than repair some parts. The fact is that the price of such a device is relatively small, and the simplicity of the design significantly increases its service life.

However, there are situations where the replacement of the drain system is associated with almost complete disassembly of the toilet bowl. Therefore, it is worth remembering that products with metallic elements that are subject to corrosion do not need to be purchased at all. Some craftsmen, in the absence of an alternative, simply change the brackets and slats on the construction of stainless material.

Tip! When purchasing a specific model of such a drain system, you need to immediately buy some spare parts for it. In this case, special attention should be paid to rubber gaskets and seals, which fail the fastest. The fact is that after a certain time they may not be on sale.

Partial replacement of the drain system using stainless steel parts

Recommendations of the masters

Work near the ceramics tool needs to be very neat. Even minor mechanical damage or shock can cause chipping or cracking.
If, after installation, leaks were found in the places where the drain valve of the toilet cistern and the drain hole fit, then it is worth making a small lapping or cleaning the surface of all the touching elements. If this defect has not been fixed, you should contact the seller for a refund or replacement.
When the system is repaired, it is necessary to clean all the parts from rust. However, it must be done very carefully so as not to damage the parts on which it appeared.

Sometimes even such a simple job is associated with a number of difficulties, and some people should turn to specialists for its implementation.

Conclusion

Having studied in more detail the video in this article, you can understand all the features of such structures and the principle of their work. Also taking into account the text outlined above, it is necessary to conclude that the main advantage of such systems is an excellent appearance and the almost complete absence of noise from water.