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Expansion vessel could be flat, is it dripping out the PRV outside? Is the condensate running when the boiler isnt running.
I personally dont use leak sealer as I think it can lead to other problems but someone will argue with me im sure.
A weeping rad shouldn't cause that but it depends how much they are weeping.
konastab01
I’m loosing pressure in my boiler on an increasing rate. I need to “top it up” every two weeks now.
I know I have three very small leaks at different points on very old radiators. These are getting replaced next week but I’m wondering if such small, almost weeping leaks could cause the boiler to use that much pressure?
I’ve read about the fernox liquid seal as well - anyone used that before?
Any ideas?