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I have a Potterton Promax HE plus 15/2. I have recently had a water leak which was fixed by a Baxi engineer. He found the gas pressure at the boiler to be 15mbar. The gas pressure at the meter is 22mbar. I have been told the gas pressure at the boiler should be at least 17mbar, the manual says...

Hello, I have an unvented cylinder, Megaflo HE. The pressure drops from 1 bar to 0.4 over about 5 days then it will stay at 0.4/0.3 for at least a week (I usually then bring the pressure back up to 1). It never drops to 0. I have searched for leaks on all the radiators and around the cylinder...