back 105e losing water

Joined
18 Sep 2007
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Durham
Country
United Kingdom
hi my boiler drops below 1bar about once every 2 months and I need to top it up for a few seconds , what could be wrong ? Thanks
 
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presure relief valve passing, check for signs of water coming from pressure relief pipe outside. small leak from a rad valve!
 
I can't see any water coming out of the pipe outside . Would it be expensive to get a preasure relief valve replaced ?( this may be realy stupid but could not having the plastic caps on the rad valves lose water ?)
 
between £50 and £70 pound, but if its not leaking then you wont need it replacing, have you checked your radiator valves? if it only needs repressurising every 2 months then it will only be a small leak.
 
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I've checked all my radiators and non of them have the slightest leak . Is the only way to check all my pipework under my floorboards or can a put something into the system to fix the leak ? Thanks
 
Don't put leak sealer into a combi system before proving all the other parts are OK.
 
Don't put leak sealer into a combi system before proving all the other parts are OK. Its a last resort.
 

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