In article
,
sbb wrote:
Wouldn't you need a "negative head" pump for installation in the loft?

Hi Andy, Doesnt a "negative head" basically mean you have to manually
switch the pump in cases whrere there is not enough pressure for it to
happen automatically. My old showerforce one was not setup like this ?

IIRC, they are two pumps in one - a lift pump followed by a force pump.
Positive head ones are just force pumps.

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Dave Plowman London SW
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