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Told boiler needs a new expansion vessel along with pressure relief valve - how much should this be?

Discuss Told boiler needs a new expansion vessel along with pressure relief valve - how much should this be? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Martyn2 said:
I have been running my system like this for the past 4 years, no problem. Changing boiler this year though as the existing one is 15 years old.
Click to expand...

You sure your system isn't open vented?
 
Martyn2 said:
As far as a new expansion vessel goes, there is an alternative. You can drain the system and after refilling, partially bleed one radiator, preferably in a room you don't use much. This will act as an expansion vessel. As the pressure relief valve is a purely mechanical device I suggest yo dismantle it, give it a good clean and retest.
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This used to be used as a short term fix to get people through the weekend on a Friday evening. Not a long term fix
 
DevsAd said:
I'd have thought it pretty tight, tho' there's a chance (not sure of the size of vessel you need.)

What's under the microwave space - is there a kitchen base unit? If so, I'd have thought it could go in there.

Could you post a further-back picture to show what's around the boiler?
Click to expand...

Sorry for the delay but here are some more pictures

IMG-20180211-WA0000.jpg


IMG-20180210-WA0002.jpg


IMG-20180210-WA0001.jpg
 
Assuming that the plumber has done the obvious stuff and checked that the boiler's exp vessel is knackered, then your options remain as before, Sarah.

1) New boiler - circa £2k
2) New boiler vessel + PRV - £350 (with the associated risk of disturbing the boiler, but looking at the photo the flue shouldn't be an issue).
3) Fit an external exp vessel and replace PRV - I dunno, £200-ish?

An external vessel could be fitted on that adjacent wall - very ugly indeed - or possibly in a nearby room (where do these pipes through the ceiling go to?)

Anyhoo, your own plumber is the guy who's going to carry out whichever of these jobs you decide on, so discuss the 3 options with him :)
 
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