Grundfos Pump running continually?

[NanangoAnn41]

Hi there all fellow DIY'ers.

We have a Grundfos pump (not sure of model) And after our rainwater tanks ran dry (pump seemed to still work), we have noticed that the pump runs continually and finds it hard to get up the required pressure to turn off - but only sporadically.

We have bled the line, and this worked for about 24 hours, and have also installed a new rope filter. The tanks which we have just cleaned (lots of gum trees around) were FILTHY and had a sludgy sticky substance on the bottom, probably from the oils in the leaves of the trees.

My question is, does the pump require priming (is that the word - when you use a bicycle pump to achieve a pressurized bladder again) or would it require cleaning, or is it completely had it because of running dry?

Hubby has just noticed that there is a valve at the bottom of the pump as well as the top (where we bled it through), would this be where we'd clean the actual pumps internals?

We are in a rental property and are not overly familiar with tanks/pressure pumps.

Look forward to your response.

Thanks heaps.

Ann

 

[Agile]

We are in the UK and do not use systems like you have, so its difficult for me to guess what you have and whats wrong.

The usual advice would be to call the landlord and let him get a plumber to fix it.

Letting it run dry may well have damaged it. A good installation would have a low level switch to prevent this happening.

Tony

 

[NanangoAnn41]

Thanks for that Tony.

It usually only acts up at night (only 2 nights in a row now) when we need the water so have not yet called the landlord/Real Estate.

Cheers for now, and thanks for a great forum.

Ann