Hi,
I have not seen a oneway valve before on a conventional system, so was not sure if it was required for a unvented sealed system.
Th valve indicates it is set to 3bar.
Hi,
I have a central heating system which is a sealed unvented (pressurised) system (Gloworm/RCM cylinder) which is making a continuous noise whilst the pump (Grundfos) is on and running.
I have replaced the pump under warranty, which helped to reduce the noise level..
Now the remaining...