Question about Grundfos MQ3-45 1 HP Pressure Booster Pump

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My mq 35 pump, has started to splutter and the pressure goes completely, occasionally coming back on its own and other times i have to reset the alarm... the pump is three years old and this has been happening for about three weeks

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Sounds like it may be air in the system - there is a black plastic bleeder screw on the top of the pump - open it and let air escape, if any, then fill with water, close screw and start pump.

Posted on Oct 29, 2010

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Posted on Jan 02, 2017

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