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I'm not a plumber, but it sounds like you have a gravity-fed system - you have the HW on the programmer connected to your boiler, and the CH connected purely to the CH pump. If this is not the case then it sounds like you have your programmer set to the "G" position in error. If a programmer...

I'm not a plumber, but it sounds like you have a gravity-fed system - you have the HW on the programmer connected to your boiler, and the CH connected purely to the CH pump. If this is not the case then it sounds like you have your programmer set to the "G" position in error. If a programmer...

Sounds like you well know your systems ;) Right about the age... 1977 it says it was installed. But no on the TRV front - when we moved in there was no TRVs or roomstat, and the hot water was hardwired to the pump. To say it was difficult to control would be a euphemism. So am I right that...

Well I don't think I would ever figured that out. I've never heard of one of these. Do you know if this is common? Would it be advisable to change it? Would it explain why our water takes **ages** to heat up, even though the boiler circuit is baking hot? As that's cleared up, can someone tell...

Umm - that's just what they do - i thought one was supposed to be in the bottom and one in the top. Have a look yourself and see what you think...

Why do you say that it doesn't really look like that - because of where the pump is?

Ok - i was confused about the TRV bit - especially considering that it was on a tee fitting. Cheers for clearing that up - But the rest of it - it really does look like that... (i didn't include the stopcocks) - that's what confused me. That's why I asked on this forum.

Hi all... I'm not completely clueless about CH systems, and I have read up before asking, but my airing cupboard has got me stuck, and was wondering if someone could explain to me... It's a gravity-fed open vented system (there's no valves, and the programmer is in 'G' position). The...