What's the difference between a positive and negative head shower pump
- our pump has sprung a leak and I need to replace it but I don't know
what kind of pump it is. The pump is in the the loft of our bungalow,
with the cold water tank higher than it and the hot water cylinder in
a cupboard at ground level.

TIA
Rob.

wrote:

What's the difference between a positive and negative head shower pump

A "normal" shower pump is a positive head one. It boosts the pressure of
a shower that would still work without it, but does not have adequate
performance.

A negative head one will work in situations that would not work without
a pump - such as a shower head above the level of the cold water cistern
(or at least not far enough below it to get any real flow at all). Many
of the negative head ones need a separate pull switch to start the pump,
since they can't be activated by the gravity water flow.

- our pump has sprung a leak and I need to replace it but I don't know
what kind of pump it is. The pump is in the the loft of our bungalow,
with the cold water tank higher than it and the hot water cylinder in
a cupboard at ground level.

Sounds like you need a positive head one then. Stuart Turner probably
make the best pumps.


--
Cheers,

John.

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