The problem:
New Combi Boiler installed (British Gas - managed to flood ceiling and kitchen! not the reason for the thread)
Installing a new Thermo Mixer shower and was hoping that as both Hot and Cold are now mains pressure that they would be similar, however as the cold mains fed water goes through the combi boiler and heats up it drops the water pressure enourmously. The Hot water pressure was fine but the cold water to the taps (that were gravity fed) was ridiculously powerful - to the point that 1/4 open a cold tap and it was so powerful that it would hit the base of the sink and then rebound out showering water all over the floor.
BG guy's suggestion was to half close the main stop cock - did that and then the Cold water pressure was fine but the hot water was a dribble once the mains fed gold goes through the combi and is heated up.
The only solution that I can think of (not a plumber) is to keep the boiler mains fed at full pressure and then fit a pressure reducing valve after the feed to the boiler but before the cold taps that it feeds so that the boiler is fed with full pressure and then drops during the heating process but is still a decent pressure and the cold taps on mains fed via the pressure reducing valve are lowered via this to equalise the pressures.
Is this a sensible suggestion and something quite 'normal' or not?
Advice please........
New Combi Boiler installed (British Gas - managed to flood ceiling and kitchen! not the reason for the thread)
Installing a new Thermo Mixer shower and was hoping that as both Hot and Cold are now mains pressure that they would be similar, however as the cold mains fed water goes through the combi boiler and heats up it drops the water pressure enourmously. The Hot water pressure was fine but the cold water to the taps (that were gravity fed) was ridiculously powerful - to the point that 1/4 open a cold tap and it was so powerful that it would hit the base of the sink and then rebound out showering water all over the floor.
BG guy's suggestion was to half close the main stop cock - did that and then the Cold water pressure was fine but the hot water was a dribble once the mains fed gold goes through the combi and is heated up.
The only solution that I can think of (not a plumber) is to keep the boiler mains fed at full pressure and then fit a pressure reducing valve after the feed to the boiler but before the cold taps that it feeds so that the boiler is fed with full pressure and then drops during the heating process but is still a decent pressure and the cold taps on mains fed via the pressure reducing valve are lowered via this to equalise the pressures.
Is this a sensible suggestion and something quite 'normal' or not?
Advice please........