Fri Dec 03, 2021 1:49 pm
#1886421
Bill McCarthy wrote:Pump cavitating due TRVs shutting down causing reduced flow.
I'm guessing at something along those lines - also getting a bit of kettling from the boiler which would imply the flow rate may not be high enough. I thought the ABV is supposed to compensate for the TRVs closing off, but it's adjustable so might not be correctly adjusted. There are two bypass radiators and two towel rails with no TRVs, but none are fully open to preserve the need to balance the system when cold.
Edit: Fully opening the bathroom towel rail stops the kettling so I think I have a flow issue
You shouldn’t have to drain down the system to remove a radiator - shut the TRV and the throttle valve at the other end, noting how many turns to shut
I was permanently removing a massive conservatory radiator and associated pipework hence easiest (for me at least) to drain down and refill