In article
David Hearn wrote:
Having successfully fitted our mono mixer tap to our gravity hot water
system (and mains pressure cold water) I'm considering adding a pump to
the hot water system.

The flow to the tap is adequate and I'd be happy with it to stay like
that - but we also have quite low pressure to the bath, which we've
lived with for nearly 3 years, but it would be nice to have it fill a
little quicker.

The water tank is in our kid's bedroom, and therefore we don't want any
pump which might make significant noise. Silent would be ideal. We're
not looking for wonderful performance - just a reasonable increase in
pressure - I'm hoping that will mean we can do with smaller/quieter pump.

How the pump is mounted can be as significant as the noise it makes to
start with - if you mount it securely on a heavy concrete block, sit
that on a sheet of foam and make sure the flexible connectors aren't
pulled tight then much less vibration will be transferred to the
structure. You could also place sound-damping material inside the
cupboard, but don't enclose the pump or it may overheat.