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Yes there has been water coming from there..

It's currently on now and at 2

Hi all, Got a 3 year old potterton promax that seems to lose it's pressure every 6-8 weeks particularly in the colder months. First we note no hot water, check gauge which is on zero, than I turn a grub screw (don't know what it's called) to increase pressure (which normally goes too high) and...