my vaillant boilers pressure is dropping almost everyday. I've to fill with the water. if the pressure is on bar 1 after arating the boiler it goes to bar2 and after switching off I find pressure has gone down bar1. that's how its pressure is dropping. I can trace water gone out through pressure release pipe.

S Hussain, September 2008

Hi your pressure release valve ain't shut properly or it aint closing n you need a new one or you have to check that it is closed.
any help needed you can contact me on
paki_maffia_949@hotmail.com

Mo, January 2009