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.

So, can anyone recommend a very quiet pump suitable to increase the hot
water flow to taps. I'm not looking to replace any of the pipework
coming directly out the tank (surrey flanges?) - rather just cut into
the existing pipework after it has left the tank. At present we have no
intention of using it with a shower (would require bathroom re-fit which
we've no desire to to for a long time) - so this might help in giving an
idea of the pump needed.

Many thanks

D