G
gardinerg
Hi guys and gals, I am hoping you can help me. I recently moved in to a house with a Megaflow (with red expansion tank) and I notice that the pressure valve underneath drops over time (a couple of days). I can top this up by opening the inline valve (also underneath it) for 30 seconds or so, but I guess I shouldn't have to?
(I recently had to replace the 2 broken mixer showers (the plumber I called out didn't really know much about the unvented systems but suggested I turned the mains off, which worked when he did it). )
I have tried regenerating the bubble and there are no signs or noises of water leaking that I can hear (maybe it's an air leak on a PRV ??).
After replacing the showers I was disappointed by the shower pressure, it was then I noticed the low pressure in the expansion tank and subsequent drop after re-filling.
Whilst I am not a plumber by trade or certification I would appreciate some explanation of how the expansion tank should opperate and does this behaviour change with the hot water off or not? Would I be right in saying never to leave the fill valve open under the expansion tank?
I assume the shower pressure will improve and be consistent if the pressure in the system is correct and stable, is that correct?
I think the system is faulty and needs some tlc so am probably going to need a experienced (in unvented systems) plumber who works around Fleet, Hampshire... Don't worry, I have NO intention on touching the system beyond the basic ownership requirements, I just like to know how things in my house work.
Thanks in advance for your help,
P.s. the big lack valve on the inlet to the Megaflow will not close, at least not with my limited strength!
Cheers
Grant
(I recently had to replace the 2 broken mixer showers (the plumber I called out didn't really know much about the unvented systems but suggested I turned the mains off, which worked when he did it). )
I have tried regenerating the bubble and there are no signs or noises of water leaking that I can hear (maybe it's an air leak on a PRV ??).
After replacing the showers I was disappointed by the shower pressure, it was then I noticed the low pressure in the expansion tank and subsequent drop after re-filling.
Whilst I am not a plumber by trade or certification I would appreciate some explanation of how the expansion tank should opperate and does this behaviour change with the hot water off or not? Would I be right in saying never to leave the fill valve open under the expansion tank?
I assume the shower pressure will improve and be consistent if the pressure in the system is correct and stable, is that correct?
I think the system is faulty and needs some tlc so am probably going to need a experienced (in unvented systems) plumber who works around Fleet, Hampshire... Don't worry, I have NO intention on touching the system beyond the basic ownership requirements, I just like to know how things in my house work.
Thanks in advance for your help,
P.s. the big lack valve on the inlet to the Megaflow will not close, at least not with my limited strength!
Cheers
Grant