S
Spud
Hello - first up I am not a plumber, so am hoping that my problem is one of those really easy things to sort out if I was!
The 3 bar pressure reducing valve fitted to the cold water inlet pipe to my Heatrae Sandia Megaflow in the airring cupboard has just started to make a thumping or knocking noise as soon as we turn on any hot water taps in the house.
It looks as though the black cartridge part of the valve is bobbing up and down in time with the knocking noise - it sounds like pump.
Any ideas how to sort it?
The 3 bar pressure reducing valve fitted to the cold water inlet pipe to my Heatrae Sandia Megaflow in the airring cupboard has just started to make a thumping or knocking noise as soon as we turn on any hot water taps in the house.
It looks as though the black cartridge part of the valve is bobbing up and down in time with the knocking noise - it sounds like pump.
Any ideas how to sort it?