I've recently had some problems with system pressure regularly dropping on my combi (Ariston Microgenus) typically from 1 down to 0.2 bar over 2 days. Our plumber has replaced the PRV on it but the problem persists.
Boiler is connected to a UFH manifold. The manifold has its own PRV which does not appear to be dumping water (I have containers outside underneath both PRV pipes). And I'm 99.9% sure there are no leaks or signs of water in/around the manifold.
So any ideas what I can check next?
All I can think at the moment is to run each of our 4 UFH zones separately to compare if (god help us) the pressure drop only happens when the most commonly used zone is on.
What about the boiler, eg expansion vessel - any obvious signs or tests I can do to check?
Boiler is connected to a UFH manifold. The manifold has its own PRV which does not appear to be dumping water (I have containers outside underneath both PRV pipes). And I'm 99.9% sure there are no leaks or signs of water in/around the manifold.
So any ideas what I can check next?
All I can think at the moment is to run each of our 4 UFH zones separately to compare if (god help us) the pressure drop only happens when the most commonly used zone is on.
What about the boiler, eg expansion vessel - any obvious signs or tests I can do to check?