Cleaning, flushing and bleeding of underfloor heating

Why underfloor heating weakens over time

Sediment, oxides and, in older systems without an oxygen barrier, rust accumulate in the water within the circuits. Sediment settles at the lowest points of the circuits and in flow meters, narrowing the cross-section and slowing down water flow. Air also accumulates in the circuits after each refilling. The result: the pump runs, but the floor is lukewarm or only heats part of the room.

How the flushing process works

• We disconnect the manifold from the heat source and connect the flushing equipment.
• Each circuit is flushed separately with a pulsating water flow, optionally using a cleaning agent, until clean water emerges.
• We fill the system with treated water, add a corrosion inhibitor and bleed it.
• We balance the flows on the manifold and check the pump and valves.

Bleeding air without a service visit

If you hear bubbling in the circuits or one loop is cold, it is usually air. The manifold has bleed valves to release the air and then restore pressure. If the problem recurs, there is a leak somewhere or the expansion vessel is incorrectly set, which is work for us.

When is it time for servicing

• The floor heats unevenly or some rooms not at all.
• The water in the flow meters is brown or cloudy.
• The pump is humming and the system pressure is dropping.
• The system is over ten years old and has never been flushed.

What is included in the service

Diagnostics, flushing of all circuits, replacement of clogged valves and actuators, bleeding, inhibitor top-up, hydraulic balancing and protocol. If the manifold or pump is faulty, we will inform you in advance and offer a replacement.