My son and his wife live in a Victorian terrace house and have suffered
constant problems with their combi boiler tripping out due to low water
pressure. The water pressure was low because, like many old terraced
properties, there were half a dozen houses fed from a single 'communal' feed
from the water main.
My wife and I have just paid out (almost £1k!) to have them connected
directly to the water main. The water pressure has increased considerably
but, if you have both hot and cold taps running on the bath, the hot water
flow slows to a virtual trickle and I can't understand why.
Their boiler is a Worcester Bosch 240 combi - about 9 - 10 years old I
think. Personally I think it is a bit underpowered. I have a W Bosch 30CD
which is great - but if I turn on a cold tap when a hot tap is running,
although there is some reduction in flow from the hot tap, it certainly
doesn't slow to a trickle.
Assuming that the water pressure in my son's house is now up to standard -
why should the hot water flow slow down so dramatically when a cold tap is