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New Monsoon Shower Pump not starting in loft shower

Posted: Tue Dec 22, 2020 10:16 pm
by olly66
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

Re: New Monsoon Shower Pump not starting in loft shower

Posted: Wed Dec 23, 2020 10:17 pm
by stoneyboy
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