Is there a quiet/silent water pressure pump, or a way to make one quieter?

[chris14679]

We have a so-called "Quiet Quad" 12v drinking water pressure pump which sounds like a motorbike and a Shurflo one which is a little better but not much.

Does anyone know of a genuinely quiet water pressure pump design? We are sick of waking each other up in the night by turning on the tap!

I guess an impeller type pump would be a lot quieter than a diaphragm pump if it could reach the required pressure but I've never seen one sold for this purpose.

I'm pretty sure the domestic water pressure booster pumps sold in the UK do use impellers but they are all 230v and way too big for use on a boat. The motors tend to be rather noisy too and they have impellers both ends for hot and cold water. It shows that the concept of an impeller based pressure pump works though. Perhaps an impeller and pressure sensor from one of those could be coupled to a quiet, brushless 12v motor? Could be they use a flow sensor not a pressure sensor though.

Has anyone tried something like that? Any other ideas?

Cheers,
Chris