since having my back boiler replaced with a vailent combi boiler the hot running water pressure seems to have dropped to not much more than a trickle for the bath any body have the possible cause and if so any cure. it would be very much appreciated

colin, April 2009

Lots of stuff about this topic here...

http://www.diyfaq.org.uk/plumbing/combi.html

Bath filling time appears to be poorer with combination boilers from what they say. With no stored water to draw upon; from a hot water tank, the flow seems to be limited by the boilers ability to change the temperature of the incoming water to the outflow temperature. Worse in the winter & better in the summer.

Peccavi, April 2009