does anybody make a gadget that keeps the pressure up in a combi?
- posted
6 years ago
combi boiler
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- posted
6 years ago
On a normally-working system, you hardly ever need to top it up. I think we do ours maybe once a year. I'd prefer to know when it gets topped up, as frequent top-ups indicate a fault.
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- posted
6 years ago
Perhaps you should find where it's leaking - it might be doing some mischief ;->
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- posted
6 years ago
yes - essentially a pressure reducing check valve usually set at 1 bar - but as others have said they are not "a good thing"
there used also to be a regulatory requirement to disconnect the filling loop between use but I don't know if that is still in force. I do know it's commonly ignored :)
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- posted
6 years ago
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- posted
6 years ago
My company office heating has one. It happily carried on topping up the pressure after a leak developed during the Christmas shut down a couple of years ago. It turned what would have been a small puddle into a major flood!
Mike
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- posted
6 years ago
If it's going down, you have a leak!
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- posted
6 years ago
Some boilers have a built in filling circuit and no loop. Plus no one ever disconnects the loop :)
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- posted
6 years ago
Yes. Its called a pressure vessel
If it has lost its ait., pump it up to a couple of bar.
If it's full of water, replace it.
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- posted
6 years ago
Ah, thanks. A little digging shows one can now leave domestic connected if fitted with a Type BA or CA backflow prevention device.
Plus no one
presumably "when an inspector calls" there's always (a) rapid application of spanner or (b) a choccy bikkie by-pass ;)
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- posted
6 years ago
+1
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- posted
6 years ago
Finding it is the problem.
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- posted
6 years ago
Yup, see if you can find someone who sells a "non leaking primary system"!
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- posted
6 years ago
9 times out of ten its down to a failed pressure level and the water pisses out if the pressure relief valve
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- posted
6 years ago
£114.31 !!!!!
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- posted
6 years ago
The one I installed was non-leaking -- IIRC, no pressure drop in
5+ years. Before filling, I did pressure test every part of the system to 2 or 3 bar with air though (something that's not very safe to do, and never do it with anyone else in the house).After about 12 years, the O-rings on the radiator blanking plugs started leaking (not enough to be wet, but some crystalised salts are visible). Even so, it hasn't needed topping up more than once a year.
I have bought a load of nickle plated taper blanking plugs to seal on the thread rather than by O-ring, but not got around to fitting them yet.