MQ 3-45 won't stop running

[brian62c]

Hi all,

The saga of my Grundfos MQ 3-45 continues.

Having sorted how and where to put the non-return valve (see previous post) the pump now won't stop running, even when there's nothing pulling water.
The instructions say it will do this if there's no non-return valve or it's faulty or there's a leak in the pipework. Well, the valve is in place as per the G website video, it was brand new with the pump and the pipework's all been redone and is fine.

Any ideas anyone?

Cheers,

Brian

PS: The water feed is direct from a private borehole via 15mm pipework.

 

[Agile]

You know what installation you have but I dont. You should have continued the existing thread.

If you are trying to suck water out of a borehole with the pump at ground level that might not be possible.

15 mm tube seems very small for sucking much water.

Tony

 

[brian62c]

Well excuse my ignorance. I thought my previous thread was done and dusted so I should start a new one.

I thought this site was for getting help, not for being criticised. If you don't like the way I post, don't reply, thanks all the same.

B.

 

[AlanE]

Well excuse my ignorance. I thought my previous thread was done and dusted so I should start a new one.

I thought this site was for getting help, not for being criticised. If you don't like the way I post, don't reply, thanks all the same.

B.

That was probably not meant as a critism but continuing with an existing thread would mean all information is together rather than split between here and somewhere else unknown without searching.

 

[Norcon]

Have you any water flowing at the taps via this new pump?

 

[brian62c]

Water is flowing fine to the taps, toilets and water tanks in the loft when the pump is switched on. The pump just won't stop running/pumping, even when there's no demand.

It is a direct replacement for an old Grundfos Jetpaq pump which blew up and was plumbed in in exactly the same way - directly fed from the borehole via 15mm pipework.

Apologies for getting stroppy. That first reply just rubbed me up the wrong way.

B.