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cambs_mark · Joined: 17 Nov 2009 Posts: 2

I'm looking to replace a Watermill PR50D pump (twin impeller 1.5bar) but have noticed that some are advertised as "regenerative" and others are not. What's the difference?

Thanks!

The Doc · Posted: Tue Nov 17, 2009 10:19 am Post subject:

Centrifugal shower pumps

Centrifugal pumps use a paddle design for the impeller and are therefore more prone to air ingress. They require a 2 meter head of water to operate and tend to be quieter in operation.

Regenerative Shower Pumps

Regenerative pumps have a solid impeller with grooves cut into the body similar to a cog. This design aids the removal of air and can be fitted with a low head of water from the bottom of the header tank pump.
They are slightly noisier than the low voltage pumps.
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cambs_mark · Joined: 17 Nov 2009 Posts: 2

Thanks! Is there any way of telling if the PR50D pump that need replacing is a regenerative or centrifugal one? or does the PR50D only come in one variety?

The Doc · Posted: Thu Nov 26, 2009 8:30 am Post subject:

Regen.

The pipes go in and out the top

Centra.

One pipe goes in the centre and the other out the top.
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