I hava Worcester 28 CDi combi boiler - pressure keeps dropping over a period of a few days to zero - whenever hot water is turned on there is a dripping noise - I'm guessing its into the drain as no water escapes/leaks - causes & solution please?
Dripping Sound From Boiler
- Thread starter tonyc131
- Start date
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prv 
Air charge lost from expansion vessel ?
symptoms
boiler and central heating on- water is discharged from the PRV* (and out into the copper "overflow" pipe)
boiler off pressure drops off more and more.
*pressure (or expansion) relief valve
symptoms
boiler and central heating on- water is discharged from the PRV* (and out into the copper "overflow" pipe)
boiler off pressure drops off more and more.
*pressure (or expansion) relief valve
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