Hello everyone, I noticed that the supply line on the underfloor heating manifold has developed discoloration.
I’ve read about various causes, from harmless biofilm to rust or sludge buildup.
What seems strange to me is that only the supply line is discolored, while the corresponding return line is not. The heating water should have been mixed during the screed’s heating process, right?
Has anyone experienced this before or knows what it might be?
I’ve read about various causes, from harmless biofilm to rust or sludge buildup.
What seems strange to me is that only the supply line is discolored, while the corresponding return line is not. The heating water should have been mixed during the screed’s heating process, right?
Has anyone experienced this before or knows what it might be?
lesmue79 schrieb:
And in return, they want to charge me for the annual flushing and refilling as additional maintenance work?That will only damage your system even more, because new oxygen is introduced every time, and that’s what actually causes the water to react.Update regarding the expansion vessel: I looked into it, but I couldn’t find any information beyond the specification that it has a 12-liter capacity.
Currently, I have a 12-liter expansion vessel for a heat pump indoor unit that includes an integrated 190-liter (50-gallon) hot water storage tank, a 20-liter (5-gallon) series return buffer tank, and approximately 100 liters (26 gallons) of water volume in the underfloor heating system.
In addition, there is the volume of 4–5 meters (13–16 feet) of 28 mm (1.1 inch) copper pipe connecting to the heating circuit distributor.
Is 12 liters in the expansion vessel enough? It seems rather small to me... If the heating installer were to replace it with a stainless steel (V2A) expansion vessel, would it be possible to increase the size?
However, switching to a V2A expansion vessel probably doesn’t solve the underlying issue. Theoretically, wouldn’t the buffer tank need to be replaced if it’s made only of steel?
Currently, I have a 12-liter expansion vessel for a heat pump indoor unit that includes an integrated 190-liter (50-gallon) hot water storage tank, a 20-liter (5-gallon) series return buffer tank, and approximately 100 liters (26 gallons) of water volume in the underfloor heating system.
In addition, there is the volume of 4–5 meters (13–16 feet) of 28 mm (1.1 inch) copper pipe connecting to the heating circuit distributor.
Is 12 liters in the expansion vessel enough? It seems rather small to me... If the heating installer were to replace it with a stainless steel (V2A) expansion vessel, would it be possible to increase the size?
However, switching to a V2A expansion vessel probably doesn’t solve the underlying issue. Theoretically, wouldn’t the buffer tank need to be replaced if it’s made only of steel?