My expansion vessel schrader v/v is leaking air. I have tried to change the core but it is tight after 1/2 a turn and feels like it doesnt want to come out. Are they meant to be changed, any advice welcome thanks.
Schrader v/v core on a baxi 105he
- Thread starter redmonp
- Start date
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Yes shraeder valves can be changed in expansion vessels. You should be able to just wind the core out
Well it's goosed either way.....
Leave it.....you need a new one.
Break it....you need a new one.
Comes out.....Bonus!
Leave it.....you need a new one.
Break it....you need a new one.
Comes out.....Bonus!
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Done, thanks for giving me the confidence to "give it a BIT", the seal rubber had hardened stopped making a good seal. New core fitted and repressurised expansion vessel, boiler pressure now seems ok.. .8 to 2.5bar, is this normal? cheers.
Pressure still seems a bit high.
When repressurising the expansion vessle did you open up the drain point to relive the pressure off the system??
If you did not do this then when pumping up exp vessle to 1 bar you will get a premature 1bar reading from the expansion vessle as the system pressure will be giving you your 1 bar reading.
I would open drain point on system and recheck the pressure in vessle.
If its ok then you might have a blocked pipe from the bottom of exp vessle into boiler.
When repressurising the expansion vessle did you open up the drain point to relive the pressure off the system??
If you did not do this then when pumping up exp vessle to 1 bar you will get a premature 1bar reading from the expansion vessle as the system pressure will be giving you your 1 bar reading.
I would open drain point on system and recheck the pressure in vessle.
If its ok then you might have a blocked pipe from the bottom of exp vessle into boiler.
I think i may have done it wrong, i shut away the system from boiler and pumped it up to 1 bar using boiler pressure guage. Should i isolate system from the boiler, drain the boiler, pump vessel up and pressure check it with a tyre press guage? cheers
Yes...thats the way to do it.
Isolate boiler, blow off pressure with PRV.
Pump exp vessle up and test with gauge (1bar)
I would always replace PRV and then refill system.
Isolate boiler, blow off pressure with PRV.
Pump exp vessle up and test with gauge (1bar)
I would always replace PRV and then refill system.
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