Hi there
I have a question that I would like to ask you both.
I have a Vokera 80SP Excel combi boiler. Over the course of 24 hours with the CH off and no use of the HW, the pressure drops around 0.5 Bar ( 1.2 Bar to 0.7 Bar ).
The system has recently been topped up with 1L of corrosion inhibitor.
The boiler was recently serviced. The expansion vessel was fine - pressured up to 1 Bar also no signs of water at the Schrader valve. There was no evidence of a leak from the AAV inside the boiler and no other evidence of any other leaks.
The PRV has been checked - placed a clear plastic bag on the discharge pipe outside - after 24 hours the bag was empty - no water. So the EV and PRV seem fine.
I went around all the radiators ( 5 in total ) and the towel rail.
I used a piece of blue tissue paper and checked for leaks at the TRVs and the lockshield valves - also checked for leaks at the air vents and the blanks at the top of all the radiators. No signs of any leaks.
I also checked for any drips on the carpet / laminate - there were none. There were no stains on the carpet or water marks on the laminate flooring.
When the CH is on the pressure rises slightly as expected. All the radiators are hot right at the top so no indication of trapped air or gas due to corrosion. The boiler is at the top of the system so any air vents through the AAV.
From this I deduce there must be a leak somewhere under the flooring ? I am in a first floor flat. The neighbours downstairs ( who I know well ) have not mentioned any damp patches on their ceiling ? The pipe work below the flooring is microbore.
I am thinking about using Fernox F4 Leak Sealer, but I am concerned that it might block either of both of the heat exchangers in the boiler ?
Would you be able to offer your opinion ?
Cheers
I have a question that I would like to ask you both.
I have a Vokera 80SP Excel combi boiler. Over the course of 24 hours with the CH off and no use of the HW, the pressure drops around 0.5 Bar ( 1.2 Bar to 0.7 Bar ).
The system has recently been topped up with 1L of corrosion inhibitor.
The boiler was recently serviced. The expansion vessel was fine - pressured up to 1 Bar also no signs of water at the Schrader valve. There was no evidence of a leak from the AAV inside the boiler and no other evidence of any other leaks.
The PRV has been checked - placed a clear plastic bag on the discharge pipe outside - after 24 hours the bag was empty - no water. So the EV and PRV seem fine.
I went around all the radiators ( 5 in total ) and the towel rail.
I used a piece of blue tissue paper and checked for leaks at the TRVs and the lockshield valves - also checked for leaks at the air vents and the blanks at the top of all the radiators. No signs of any leaks.
I also checked for any drips on the carpet / laminate - there were none. There were no stains on the carpet or water marks on the laminate flooring.
When the CH is on the pressure rises slightly as expected. All the radiators are hot right at the top so no indication of trapped air or gas due to corrosion. The boiler is at the top of the system so any air vents through the AAV.
From this I deduce there must be a leak somewhere under the flooring ? I am in a first floor flat. The neighbours downstairs ( who I know well ) have not mentioned any damp patches on their ceiling ? The pipe work below the flooring is microbore.
I am thinking about using Fernox F4 Leak Sealer, but I am concerned that it might block either of both of the heat exchangers in the boiler ?
Would you be able to offer your opinion ?
Cheers
