SYSTEM LOSING PRESSURE BUT CANNOT FIND LEAK

Joined
3 Nov 2009
Messages
33
Reaction score
0
Location
Essex
Country
United Kingdom
Please help!!!
I'm about to put my flat on the market but the heating system keeps losing pressure. It definatly does not have a leak anywhere.

I have underfloor heating on two rooms from a manifold, and 5 radiators.
I have an expansion vessell and a Potterton Profile boiler with a storage tank.

The pressure releif valve from the boiler does not exit an outer wall, I think it has been plumbed into the waste somewhere as the previous owner was a plumber and I can't ask him about it because unfortunatly he is dead. I spoke to a plumber last week on a job I was on about this and he advised me to pressure the system and see if air or water comes out of the bottom of the expansion vessell, I tried to today when I was there and got air.

Any other suggestion please, or any good plumbers near N11???


Thanks
Mark
 
Sponsored Links
Joined
15 Feb 2008
Messages
894
Reaction score
103
Location
Manchester
Country
United Kingdom
Trace the PRV pipe work disconect it and put a plastic bag over it with an elastic band to hold it in place repressurise the system then as the pressure drops check it.
 
Joined
3 Nov 2009
Messages
33
Reaction score
0
Location
Essex
Country
United Kingdom
Thanks for reply mate but I have tried looking for the prv pipework and suspect it may have been chased into the wall behind the tiling. I have had the plastic cover off the bottom of the boiler but cannot see any pipework branching off anywhere.
 
Sponsored Links
Joined
3 Nov 2009
Messages
33
Reaction score
0
Location
Essex
Country
United Kingdom
Sorry to sound like a complete idiot but disconnect what from where?
Not too knowledgeable about boilers
 
Joined
9 Dec 2009
Messages
6,341
Reaction score
1,061
Location
Lancashire
Country
United Kingdom
have some one look at your boiler it may cheap in long run
but the prv goes outside via a piece of copper
 
Joined
27 Sep 2010
Messages
821
Reaction score
121
Country
United Kingdom
Does the pressure gauge go up significantly when the system is hot?
 
Joined
2 Dec 2005
Messages
57
Reaction score
0
Country
United Kingdom
From my boiler having same probs a year ago, Pressure raises when heat on, Over night or when not on for a length of time pressure drops off scale..It was my expansion vesal in the back of the boiler..Pumped it up and all was fine
 
Sponsored Links
Top