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Mend Potterton Promax Boiler Pressure Loss Heating System

Why does my boiler keep losing water pressure.I have to repressure every tw?

My recently installed heating system boiler (potterton promax ) keeps reducing water pressure. I have repressured twici in last three weeks. What is causing this?

jim
November 2008
PottertonPotterton PromaxHeating, Home Heating SystemsBoiler Pressure Loss Heating System
I had BG out today to put in a new PCB. I also had the problem of having to keep increasing the pressure as it kept dropping. BG said all it was, was a small black rubber thing (not very technical - sorry!). He's replaced it also - but he says sometimes this part gets worn and is very easy and cheap to replace.

Z
November 2008
you have a leak somewhere

trainee corgi man ?
November 2008

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Potterton Promax Boiler Losing Pressure - Fixes