First Off, Can I thank everyone who responded to my last query. This problem is an extention of the last one. I Have a Protherm 80E Combi- boiler that kept losing pressure and cutting out. I got the engineer out (connected to the firm that makes the boilers) who pre-charged it but warned me that it may lose pressure again if the expansion vessel was damaged. True to his word 3 days later it lost pressure again. I know that it will require 2 engineers to change it and it will cost a fortune. He mentioned that I could get a plumber to fit an external expansion vessel to bypass the problem instead. Would most plumbers be prepared to do this? Would it be more cost effective? Would I be better off Buying an entirely new boiler? Many thanks for any advice you could give me.
? External Expansion Vessel
- Thread starter dogfather
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My opinion is
Yes, yes and no respectively
Thanks Slugbaby - Will get some quotes after the weekend. I do know when I tried to find a boiler firm last year to deal with a different problem I found it difficult to find one that would touch a protherm boiler with a barge pole (which is why I went with the protherm company this time around). Hopefully someone will take ithe job on. Cheers
The principle is easy Just get a pressure vessel from another combi of about 8 litres or more and connect it to your heating system. Preferably to a pipe that is 15mm or larger
The difficult parts are :-
Finding a suitable pressure vessel that preferably has a 1/2", 3/8" or3/4" BSP connection as cheaply as possible. From these sizes you should easily be able to connect to 15mm pipe.
Go into a parts supplier and ask what they recommend. [Others on here may be able to help with that one]
Finding a suitable location for it. Under the combi is often possible as is inside a cupboard
I'd love to sort the job out for you but I am about 300 miles away
The difficult parts are :-
Finding a suitable pressure vessel that preferably has a 1/2", 3/8" or3/4" BSP connection as cheaply as possible. From these sizes you should easily be able to connect to 15mm pipe.
Go into a parts supplier and ask what they recommend. [Others on here may be able to help with that one]
Finding a suitable location for it. Under the combi is often possible as is inside a cupboard
I'd love to sort the job out for you but I am about 300 miles away
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8 litre expansion vessels are now widely available (e.g. BES or Toolstation £18 ). You may also need a support bracket (unless well supported otherwise) and perhaps a flexible connector - ¾" x 15mm to allow for movement of the vessel.
Many thanks Slugbaby and Chrishutt. Thats given me plenty to chew on.............I'll let you know the outcome.
Just to give you an update - a man from group force (or whatever the're called) came out to look @ the boiler ( free of charge as they had done the initial work) and believes the expansion vessel is fine and can find no fault or reason why it may still be losing pressure. I asked whether it may be via the PRV but he said it was bone dry. I'ts only happened twice in the last 2 weeks which is less frequent than before so maybe the problem will go away (optimistic, I know ). It could be leaking from the rads but surely I would notice that amount of water if this was the case? I will just have to wait and see what happens next. Cheers again for everyones help.
You seem irked chrishutt - have I done something to wind you up?chrishutt said:
Repudiatory isn't a legal term - it's an English word, and there are plenty of online dictionaries available to anyone who has difficulty understanding English words.
This forum was created as a means of education - let it be so.
chrishutt said:
I believe it was a malapropism and softus meant to purport te word "reputed". That is unless he repudiates my theory
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Protherm is to reliable as Thameslink Trains is to 'on time'. There are numerous places this boiler could leak, and often does leak. If this leak is in the main heat exchanger you may not notice it except by the loss in pressure (repudiatory or not).
If the heating system is large the internal expansion vessel may not be large enough to cope, so take advice and size the new one accordingly. I usually would fit 18 litres to a 10 rad system for a 1/2 bar cold to hot pressure increase. How big is yours? (ooh err!)
If the heating system is large the internal expansion vessel may not be large enough to cope, so take advice and size the new one accordingly. I usually would fit 18 litres to a 10 rad system for a 1/2 bar cold to hot pressure increase. How big is yours? (ooh err!)
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