A person who has become the new owner of a house often faces the problem of rusty and dilapidated pipes. No wonder, because if the house has served for more than one year, then surely such systems as water supply, heating and sewerage have worn out significantly.
Here other problems begin to appear. For example, a heating riser in an apartment building is a common property that all tenants must pay to replace. And if the house is maintained by the housing department, and the replacement of the riser is urgent (for example, in the event of an accident), then the problem falls on the shoulders of the employees of this institution.
Features of replacing risers and heating pipes
To replace the heating riser, follow these steps in sequence:
- Shut off and drain water.
- Using a grinder, cut out old pipes and pull them out of the floor slabs.
- Determine the location of the battery and install it using a level and a puncher.
Tip: before you startit is better to get permission from neighbors living above and below, because if the heating riser remains the same in the ceilings, then the repair will lose its meaning.
System Wiring
It is important to remember that the installation must be done in accordance with the level, as skew will inevitably lead to air accumulation and poor battery performance. It is far from superfluous to purchase shut-off valves that allow you to block the area (for example, if there is a leak), without thereby disrupting the operation of the system as a whole.
If you plan to independently perform installation work, then the best option is metal-plastic pipes that easily take any shape. Special threaded connections allow fastening.
Heater wiring requires the purchase of metal pipes (preferably stainless steel).
Diagramming
Installation work cannot be started without the most detailed scheme. To do this, you need to decide on the type of heating, the type of the system itself and the ways of laying pipes.
Heating wiring can be two-pipe or one-pipe. The first option provides for forward and reverse wiring. This will make it easier to regulate the temperature in the house. After completing the calculation of the number of pipes, their length and diameter, you can proceed with the installation work.
Options for wiring diagrams for heating
If preference was given to a single-pipe vertical system, then the mosttop floor or attic. Thus, the vertical heating riser will be able to supply the coolant to each heating device.
The advantage of this is the economical consumption of pipes, and the disadvantage is the inability to separately turn off the heating devices.
In the case of laying a two-pipe vertical heating system with bottom wiring, the supply and return lines should be laid directly on the floor or slightly above its surface. This allows each radiator to be provided with its own coolant. This choice leads to an increase in the length of the pipeline, but it allows you to regulate the heating and turn off the heater at any time.
The horizontal two-pipe system involves laying the return and supply pipelines around the perimeter. Each heating device must be equipped with a special valve that allows you to release air from the structure. Such a scheme involves turning off heating by floor and using radiators with a lower connection.
The choice of a two-pipe floor-by-floor collector system involves the installation of a supply and return collector. During installation, plastic pipes for heating are used.
Riser off
How to properly turn off the heating riser? The bottom spill involves a pair connection. The easiest way to determine its location is to go up to the apartment located on the floor above and familiarize yourself with the location of the jumpers.
If the house has an upper bottling, then turning off the heating riser involves closing one valve at a time both in the basement and in the attic. How to determine where they are located? The main thing is to choose the right entrance, and calculating the position of the valve itself is simple. After closing both taps, you need to unscrew the plugs and open the vents. The complete drain of the water is followed by a check of the serviceability of the shut-off valves. Everyone, the heating risers in the apartment building are off!
Important! Implementation of work during the heating season is possible only if there is access to the apartment located at the very top. If no one lives in it, then it will be impossible to start heating.
The easiest way to disconnect a heater is to cut the wiring to it. Then the lock nut is given, and the cut of the eyeliner is unscrewed from the radiator plug.
How to choose the right place to cut the riser? It all depends on the relationship with the neighbors living above and below. Practice shows that it is better to change the heating riser through the floors, since the destruction of pipes by corrosion is most often observed at the points of contact with concrete.
Metal-plastic pipes
The modern market has a huge assortment, so the buyer only needs to decide which plastic pipes for heating he wants to install.
Main species:
- metal-plastic;
- polypropylene;
- cross-linked polyethylene.
Positive characteristics of the former include:
- corrosion resistance hence long service life;
- excellent flotation and constant diameter, since the formation of s alt deposits is impossible;
- low level of roughness of the inner layer, which guarantees minimal loss of coolant pressure;
- minimum linear expansion, and this is the most important indicator for heating, especially if there is a hidden wiring;
- high frost resistance values.
Why are metal-plastic pipes inherent in such high technical characteristics? It's all about the multilayer structure: polyethylene (2 layers), aluminum foil (1 layer) and adhesive (2 layers). In addition, metal-plastic pipes boast the following properties:
- The maximum operating temperature is 95°C.
- The working pressure parameter at the above temperature is 10 atm.
- When the temperature drops to 25°C, the working pressure increases to 25 atm.
- Exposure to temperatures up to 130°C is allowed for a short time.
Polypropylene pipes
The heating riser in the apartment is often connected to polypropylene pipes. They have many positive qualities. These include:
- affordable price;
- flexibility to get any desired shape;
- long service life;
- good resistance to high temperatures;
- high thermal conductivity.
Pipes made of cross-linked polyethylene
The riser of the heating system can also be extended with a pipe made of cross-linked polyethylene - a material that is not afraid of high temperature effects. Polyethylene itself is soft and ductile, which is incompatible with heating, but scientists have been able to identify a way to turn it into a durable product.
Specifications for XLPE:
- operating temperature maximum - 95°C;
- ability to withstand pressure up to 7 atm.;
- reducing the temperature to 70°C increases the operating pressure to 11 atm.
Compliance with the limit load threshold guarantees the service life of XLPE pipes for at least 50 years. The high flexibility of finished products cannot be ignored. In addition, almost all manufacturers produce a long hose (the bay can reach 200 m), which ensures the seamless construction of the heating system. The number of connections kept to a minimum reduces the possibility of possible leaks.
