Perhaps someone believes that this issue is not so significant, and given the cost of the entire system of warm water floor( and it is quite high), you need to focus mainly on the price of pipes? If so, then this is a big mistake. For information - in a room of 30 m² the length of the route( depending on the scheme of its laying) can reach 130 - 150 pm. Where to look for a possible leakage, because the pipes are hidden from the visual view by the "finish" coating?
Let's consider in detail which pipes are best suited for installing a warm water floor, and which ones are not recommended.
Metal
It is worth immediately discarding the idea of using metal pipes for the water floor. Not to mention the high cost of "iron", there are a number of serious arguments against its use for installing a "warm" floor. We shall write them briefly, since there are no extensive explanations here.
Firstly , susceptibility to corrosion.
Secondly , some roughness of internal walls. Such defects, although microscopic, are also sufficient for the formation of various layers, which gradually reduce the value of such a parameter as Du.
Thirdly, , heavy weight( taking into account the length of the line in the floor).If the inter-floor overlap is not from the w / w slabs( and in private houses it is not uncommon), then the factor is very significant.
Fourthly, the , the difficulty of working with the material. Crop, size, bend, cut the thread - this will require special tools. Plus to this - the unreliability of the connections. Even the FUM tape will not last long, especially if it is not water that is pumped into the system, but ethylene glycol or antifreeze( and these fluids are often used in the circuits of autonomous heating systems).
Fifth, , "pouring" products from ferrous metals with concrete solution dramatically shortens the life of the system. For this reason, SNiP prohibits the use of such pipes where they are supposed to be in direct contact with an artificial stone for a considerable length. Therefore, it is better not to take risks.
Pipes made of copper
They are characterized by excellent heat dissipation and are not subject to corrosion. But if we calculate how much installation of such a circuit will cost, then the desire to equip the pipeline with this material will quickly disappear - as they say, "pleasure is not for everyone".
Plastic and polypropylene
The best option - pipes made of polymers. There are several varieties of this product, and even without taking into account such excellent indicators as minimum temperature expansion and high thermal conductivity, they have a great advantage over metallic analogs - they are sold in coils. And this means that the contour of the water floor can be made integral, without any connections. Therefore, absolutely eliminate the possibility of leaks throughout the entire laying area.
The last question remains - which plastic pipes are better to choose for a warm floor? By and large - no difference. The most common products are metal-plastic and polyethylene. Differences in their individual characteristics can be clarified here - in this article everything is detailed.
It's different. Plastic pipes for water supply and heating systems are not the same. If it is a question of polyethylene, for heating of floors it is necessary to choose so-called "cross-linked"( REX) .Such products are characterized by increased heat transfer, which is required for heating. The use of ordinary pipes, plumbing, will not ensure sufficient efficiency of the circuit. In addition, the "crosslinked" polyethylene protects the penetration of oxygen into the internal cavity, and hence, into the coolant.
There is another kind of plastic - polypropylene. The cost of such pipes is the lowest, but it is undesirable to use them. The main disadvantage is the restriction on the radius of the bend. It should not be less than the value "diameter x 8".Consequently, the distance between the "threads" will need to be increased. And this will lead to a decrease in heating efficiency.
output
- For the contour of the water "warm" floor, the best option is to install pipes made of "cross-linked" polyethylene or metal-plastic.
- When purchasing products, it should be clarified that it is intended for use in heating systems.
- To avoid further unpleasant "surprises", it is necessary to check the availability of a product certificate. Given the complexity and cost of repairing the circuit associated with the dismantling of flooring, "to be carried out" at a low price does not follow. An unscrupulous seller can "hand" a bay of a regular water pipe under the guise of a heating, and it is almost impossible to verify forgery. Even a specialist can not always find significant differences, since the materials are virtually indistinguishable visually.
