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Hi Ian, spent a good 5 mins varying the blending valve today to see what impact it had on flow rate. It had absolutely no impact whatsoever. I'm guessing this means there's a blockage before the TRV itself? The Caleffi valve is mounted by two threaded connections with fibre washers. Those...

Thanks for your reply Ian, appreciate it! Without the hot taps on the PRV reads about 2.75 Bar. With the two hot taps on it reads a touch above 2 Bar, as per pics.

Hi everyone, Got a bit of a head scratcher that I'd really appreciate some help with. I have an Advance TSDC140 thermal store in my home. We went with this kit to compensate for some low hot water pressure issues around the house, and it has worked well until recently. Every single hot water...

Many thanks Terry. Can I ask what you mean by manually latch open the zone valve please? Do you mean I should manually secure the ballcock for the F&E tank?

OK, here she is! I've tried to get a picture angle that shows the most. I really do need to get this done, and I don't think I'll get a plumber in any time soon. To that end, my research so far leads me to think the following: Step 1: Turn off all power to the CH system. All pumps are off...

Thanks Terry. Would you happen to know if there is a specific approach to doing this specific to unvented cylinder systems?

Thanks for replying Terry. I'm under the impression that although the potable water and central heating water don't mix, I would have to drain the CH water to move the rad. Is this correct? I'm afraid I don't know if I have a sealed and pressurised CH system - what could I look for to...

Hi everyone, My house is fitted with an Advance TSDC 140 unvented cylinder. I need to move a radiator, and believe that is is necessary and best to drain the system to do so. I consider myself a competent DIYer, but know enough to stop and ask questions before doing something new. I wanted to...