I've just had both my bathroom mixer taps fitted (screw down valves not
ceramic). They are both connected to the mains cold, but they already seem
to be dripping a bit and when you turn the cold on the bath it makes a
popping sound. Should a pressure limiting valve should be fitted to each tap
or the main stop cock be turned off a bit or is high pressure not the cause?
The hot on the mixers is gravity fed.
Are the mixers suitable for mixed pressure operation? You can normally tell
because they have a spout with two water passages, rather than being mixed
in the tap body and coming out a single spout.
Rather than a pressure limiting valve, consider a pressure balancing valve.
However, this will throttle the cold down to the lowest common denominator
pressure. The other alternatives, beyond replacing the mixers is to pump the
hot water, install mains pressure hot water, or install gravity fed cold
Thanks for your answer. I can't see if the basin mixer has 2 passages as
theres a little grill over the spout, there seems to be just one large spout
on the bath filler. It's not really a problem with the basin mixer as you
don't need to have both flows going at the same time, but on the bath taps
there is a shower, if you turn the hot on to full the flow is OK but then it
gets too hot, but if you turn the cold mains flow on just a minute amount
and it goes cold. Also I'm worried that the high mains pressure could damage
the valves(screw type not ceramic) or the seals. I realise that I could have
a new cold feed from the cold tank put in but I'm worried this may be a bit
expensive(although I definitely going to have a new feed for my downstairs
shower so maybe they could do it at the same time and reduce the cost a
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