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Mend Glowworm 35ci Months Water Changed

How to solve Glowworm 35ci pressure loss(13 months old)?

Water has been discharging via overflow to outside. I have changed the PRV but it is still losing pressure. It drops from 1.5 to 0.6 in 2 hours. There is no air in the rads and the air valve on the pump is open. Cannot find any internal leaks.
Can you advise what to do next?

Barry Abel
December 2006
GlowwormGlowworm 35ciHeating, Home Heating SystemsMonths Water Changed
Very simple solution - solved it myself by gently bending the pipe leading to the expansion bottle. A build up of silt blocked the expansion bottle.

Barry Abel
November 2007
sounds like your expansion tank is bust (it happened to mine also after 23 months). You can fit an external one and forget about the awkward one at the back of the boiler to cure it (this is shown as optional in the manual). Cost will be in the region of £125 to get it done professionally.

Marty
September 2007
have you checked all radiator pipes, not leaking under floor boards. or check your expanssion vessel may need charging up with pressure or bladder split inside, but rare for 13 months old.

hi-spec plumbing
December 2006
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