went to a house today to a compliant "water is cloudish and tastes funny , but only when we use the hot tap, the cold is fine , when we run the bath the water stinks and is always off coloured, father in law reckons its the smell of flux but we havent had any plumbing work undertaken in the house recently" i thought to start off with that it could be heating water contaminating the hot water through heat exchanger (maby a pinhole type thing) of the worcester combi (gas) . now i am not gs registered, so shoud i pass it on to another plumber or can any of you think what else it could be?? but wouldent the cold water pressure push into the heating side and blow out of the prv?? this wasnt happening and the heating pressure on the boiler was 1barthis brings me to another point, i have done gas in collage, but work wont register me under their gs , is it legal for me to top up boiler pressure or drain thru the prv if i can open it without taking boiler cover off????? sorry for the long post folks!!!!! 