DIY Doctor

New Monsoon Shower Pump not starting in loft shower

Postby olly66 » Tue Dec 22, 2020 10:16 pm

Hi,

I just replaced my Monsoon Shower pump with a Grundfos pump. It takes a few seconds to start on the lower floors but in the loft bathroom it won't start at all! I bought it off ebay.....

Any tips would be appreciated.

TIA
Olly
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Postby stoneyboy » Wed Dec 23, 2020 10:17 pm

Hi olly66
There is not sufficient flow on the first floor to activate the pump Reed valves. You may have to buy a negative head pump.
Regards S
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