my vaillant boiler turns on for the heating once a day for a few minutes. after it stops , water drips for a couple of minutes from the bottom right side. not a lot, but enough to worry me. any ideas? i can vaguely see where it is coming from, using a torch.

jack oliver, April 2007

If its coming from a pipe at the extreme right rear it may be the pressure relief valve. This is a pipe that's supposed to go to the outside. If it's the p.r.v you will be able to see the pressure on the gauge going up close to 3 bar. If thats not happening it could be anything. Need more info.. Model number
and closer description...

T.H.S, April 2007