2 hours ago Jo asked ... How to engage clutch on old sewing machine to engage needle?    |    Jacky asked ... Miele Vacuum cleaner?    |    Ben asked ... Toyota Yaris French or Japanese?    |    Andy asked ... How can I mend my MacAlistair 450w hedge trimmer?    |    Felix asked ... Hitachi vt-m70em?    |    Click here to ask your question

worceter bosch combi boiler?

loosing pressure due to water leaking out of condinsation pipe.
geoff ralph, February 2012
You would not loose pressure by water out of condensation pipe. That is for all the water that condenses, (THAT WORD) You need to get rid of it some where, hence the pipe.
Losing pressure is down to a leak in your system.

SD, February 2012
link Click here to see other fixes for Bosch.