{"id":9157,"date":"2026-09-25T10:00:00","date_gmt":"2026-09-25T07:00:00","guid":{"rendered":"https:\/\/thermohouse.uz\/truby-dlya-otopleniya-kakie-luchshe\/"},"modified":"2026-09-25T10:00:00","modified_gmt":"2026-09-25T07:00:00","slug":"truby-dlya-otopleniya-kakie-luchshe","status":"publish","type":"post","link":"https:\/\/thermohouse.uz\/en\/truby-dlya-otopleniya-kakie-luchshe\/","title":{"rendered":"Pipes for heating and underfloor heating: which are best"},"content":{"rendered":"

Which pipes are used in heating<\/h2>\n\n\n\n
Pipe<\/th>Pros<\/th>Cons<\/th>Best for<\/th><\/tr><\/thead>
Reinforced polypropylene (PP-R)<\/td>Inexpensive, reliable welded joints, does not clog<\/td>Rigid, expands noticeably with heat without reinforcement<\/td>Radiator pipework, boiler room<\/td><\/tr>
Cross-linked polyethylene (PEX) and PE-RT<\/td>Flexible, easy to lay in loops<\/td>Needs an oxygen barrier<\/td>Underfloor heating, pipework in the screed<\/td><\/tr>
Multilayer (PEX-AL-PEX)<\/td>Flexible, holds its shape, hardly expands<\/td>Fittings need maintenance<\/td>Radiator pipework, renovation<\/td><\/tr>
Steel<\/td>Strong, withstands high temperatures<\/td>Corrosion, difficult installation<\/td>Boiler rooms, industrial facilities<\/td><\/tr>
Copper<\/td>Durable, thin-walled<\/td>Expensive<\/td>Premium projects<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Polypropylene for heating<\/h2>\n\n\n\n

For hot water and heating, use only reinforced<\/strong> pipes: with an aluminium layer or glass fibre. Ordinary polypropylene pipe expands noticeably and sags when heated.<\/p>\n\n\n\n

An example is PILSA composite pipes. Joints are welded with a heat-fusion tool. A correctly welded joint becomes monolithic and needs no maintenance. Welding takes experience: overheating or underheating a fitting is a common cause of leaks.<\/p>\n\n\n\n

Multilayer pipes<\/h2>\n\n\n\n

A multilayer pipe: polymer inside and outside, aluminium in between. It bends by hand and holds its shape, and hardly expands when heated. Convenient for radiator connections and renovations where there is no room for welding. An example is VALSIR MIXAL 16\u00d72 and 20\u00d72, including factory-insulated versions.<\/p>\n\n\n\n

Pipes for underfloor heating<\/h2>\n\n\n\n

For water underfloor heating, use cross-linked polyethylene (PEX) or PE-RT with an oxygen barrier (EVOH)<\/strong>, for example SINIKON PE-RT d16 pipe. The barrier stops oxygen from entering the system and protects the boiler and pump from corrosion.<\/p>\n\n\n\n

Basic rules:<\/p>\n\n\n\n