Replacing the water supply (whether at home or apartment - it doesn't matter) is an urgent problem for many residents. First of all, this procedure is carried out at the end of the service life of steel water and sewer pipes. They can collapse due to corrosion, metal decay or non-compliance with the operating pressure in the system. Replacing plumbing in an apartment requires special skills. Therefore, it is better to hire specialists who will do the job quickly and efficiently.
Special fixtures for plumbing replacement
Lerkoy is a tool that is used to create threads on a water pipe or other similar products. Replacing the plumbing is not complete without this device. It is a metal nut with special teeth in the hole.
General information about the clerk
The teeth are arranged at different angles so that when the nut is rotated, a thread is created on the water pipe.
Edges are cut with a cutting element - a cone. Their number may vary. As a rule, creating a thread onthe water pipe is carried out using a solid round lerka. Such a device is mounted on a special surface and can have up to five cutting elements. Special adaptations of the lerka, when replacing a round-type water pipe, allow cutting metric and inch threads. The tool has a significant advantage. All three edges are involved, so the thread is created in one pass.
One-piece and extendable lerka
When water or sewer pipes are replaced, it becomes necessary to create a thread. The most popular fixtures are solid and sliding lehrs.
The first type allows you to get high-quality turns on the pipe in a short period of time, while getting not only metric, but also inch threads. The process is fast as the tool is made of high quality hard metal.
Its disadvantage is a short service life. Such devices are used in the case when exact indicators should not be observed when creating turns. During operation, the device may spring, which leads to a change in the diameter of the water pipe. This difference is insignificant and amounts to only 0.1 mm. Another negative feature of the solid lerka is the low degree of rigidity, which is why the thread is not always clean and correct.
The sliding type device has specialguide elements, thanks to which the creation of threads is easier. Such a tool consists of several parts that are attached with screws.
The last elements are used to regulate the accuracy of the turns. To make the threading process more efficient, you need to purchase a set of dies that are used to cut various diameters. In this case, you do not need to spend a lot of time and effort.
User Tips
Replacing the plumbing is accompanied by the creation of threads on the pipes. In order for the end result to be of high quality, and the cutting device does not fail, you must follow some recommendations:
- threading is done only with a serviceable tool;
- cutting elements must be sharpened;
- before starting work, the water pipe must go through a series of preparatory stages: paint and dirt are removed from the surface;
- a chamfer is made at the end of the pipe with a file or a grinder;
- during operation, it is necessary to periodically lubricate the cutting elements. For this, a tool is used that has a peculiar composition.
Doing work
With the help of a lerka, you can quickly and accurately create the necessary type of thread, regardless of the type of water pipe. The work must be done in the following order:
- The water pipe is fixed in a vise (other tools can be used).
- The pipe is cleaned of dirt and paint, then removed with a fileexternal chamfer.
- A lerka is inserted with a pre-installed nozzle for the required diameter.
- The cutting elements and the pipe are lubricated with a special tool.
- The lerka should be perpendicular to the axis of the pipe. If the fixture is installed at an angle, the thread will be of poor quality and the diameter of the pipe will change.
- The rotation of the lever is clockwise. It should be smooth, without sharp jerks.
- After achieving the desired result, the lerka rotates in the opposite direction, thereby removing metal chips.
- During operation, it is necessary to periodically lubricate the pipe and cutting elements with a special substance.
Where to start replacing water and sewer risers?
If you live in a high-rise building, then the replacement of water supply or sewerage begins with obtaining a special permit. It can be obtained from the housing maintenance service. In addition, neighbors are warned about the upcoming work. Shutting off the water supply is carried out only by a specialist.
Replacement of water and sewer risers can be carried out by the entire entrance. This procedure will be much easier and cheaper. Therefore, this issue is best agreed with all residents and find a common solution. If the decision is positive, then the riser can be made of polypropylene. Otherwise, the landlord will have to re-install steel pipes or spend money on metal-to-plastic adapters.
Riser material
Select the desiredmaterial is not that difficult. The replacement of the water supply system is preceded by the selection of the main and auxiliary pipes. They are made from the following materials.
Steel
Such pipelines are able to withstand large pressure and temperature drops. The negative aspects of this material include the appearance of plaque inside the pipeline, susceptibility to corrosion that occurs during operation. In addition, the installation is quite laborious, since it is necessary to use a welding machine. Pipes are used for the installation of water and sewer systems.
Polypropylene
Despite the light weight, pipes made from this material are quite durable and able to withstand pressure and temperature changes. Their installation requires the presence of butt elements, a soldering iron, a lerk, etc. Installation can be done independently. Among the shortcomings, the impossibility of parsing the finished structure is distinguished. If one of the elements breaks, the entire structure will have to be cut. It is used not only for sewer and water risers, but also for other branches.
Replacement of water riser
Before installing the mechanism, the valves on the water supply are replaced or installed - in their absence. Old systems are equipped with a crane. To avoid leakage, it is better to cut it off and install a ball valve.
It is located closer to the riser on the return line. The installation process begins with an inspection of the butt joints at the neighbors. If they have plastic pipes installed, then the mount is notwill cause particular difficulties. The connection of the polypropylene structure is carried out using a soldering sleeve. If the neighbors have steel pipes, then you will have to make a special adapter from metal to plastic. Such places should be frequently checked for strength, as leaks may occur. This work can be done independently. However, if the condition of the steel pipe is unsatisfactory, it is better to call the master. If the installation of the adapter is incorrect, it will burst. With the help of a special device (lehrka), a thread of the appropriate diameter is cut. It is best to do 5 turns. Another way to connect metal and plastic is to install a collet coupling with an internal thread. To keep it better, use a sealing material - fum-tape. The coupling is screwed onto a steel pipe, then a polypropylene pipe is attached using a soldering iron. After all work is completed, the entire system is checked.
Replacement of sewer water pipes
When installing a sewer riser, it is necessary to dismantle the old structure. The steel pipe is cut with a grinder so that there are indents at the top and bottom of the structure. The top indent is 10 cm, and the bottom is about a meter. And we are talking about the distance from the tee. It is not worth cutting the pipe completely, as installation problems may arise in the future. A wooden wedge is inserted into the cut off upper part and hammered. You need to beat with a hammer until the pipe bursts around the perimeter. Next, the wooden wedge is pulled out and with the help of a grindera conical chamfer is performed. It is done on undestroyed elements. The lower part of the sewer riser is a piece of pipe and a tee. These elements are pulled out manually by swinging the pipe in different directions. In case of difficulties, the tee is cut off by a grinder. This frees the bell. Next, it must be cleaned of dirt and dust.
A new riser is first assembled in a draft version, where the place of attachment of the main and auxiliary elements is determined. The socket is placed in a plastic tee, and their diameters must have the same value. Otherwise, you will need to install an additional adapter. If the structure is assembled correctly, then it is disassembled, and clamps are attached to the wall, which will fix the new sewer riser.
Installation of the sewer system
To begin with, cuffs are installed with a chamfer outward and lubricated with a special sealant. It is also necessary to process all the structural details of the future sewer system, for example, chamfers on pipes and adapters. The whole structure is assembled in the same sequence as in the draft version. All connections should be carefully mounted so that there are no leaks. The last step is to fix the screws on the mounting clamps.
In some cases, replacement or installation of a tee is required. Many experts recommend inserting a tee into a sewer riser in the following sequence:
- The required place in the riser is cut usinggrinders.
- All edges are processed with a file or other grinding device.
- The pipe on which the compensator will be located is lubricated with sealant.
- The compensating element is installed on the pipe. This should leave room for mounting the tee.
- The pipe is lubricated with sealant, and a special tee is attached to it.
- The small side of the compensating element is lubricated with sealant and attached to the pipe so that it fits snugly against the tee.
- Design is ready to use. Further assembly takes place in the same sequence.
Conclusion
Replacing water supply and sewerage is a responsible event that should be handled by specialists.
The better the work is done, the longer the system will last. You can do this work yourself, but you need to have some experience in this industry and a set of special tools. Replacing the water supply in Samara is carried out by a team of specialists who will quickly and efficiently complete the work. Finding the appropriate specialists is usually not difficult. This will help local announcements and advice from people who have already applied for similar services.
