Domestic water pump gone mad

Homer J

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19 Jun 2017
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Can anyone suggest what might be wrong. The water pump doesn’t switch off after the accumulator should be full and keeps running without stopping even if the taps are all off.

I am assuming that this doesn’t do the pump any good either. What could be wrong?
 

VicS

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Can anyone suggest what might be wrong. The water pump doesn’t switch off after the accumulator should be full and keeps running without stopping even if the taps are all off.

I am assuming that this doesn’t do the pump any good either. What could be wrong?
If it seems to pump Ok and develop a good discharge pressure a defective cutout pressure switch is the most likely.

If its not getting up to its normal pressure dirty or defective valves in the pump are a likely cause .

Dirt in the valves should not be problem though if you have an inlet strainer.

If the system does not maintain pressure in the accumulator when the pump is switched off then dirty/ defective pump valves

All assuming no major leaks, off course, filling the bilges
 
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Old Harry

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29 Sep 2017
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If it seems to pump Ok and develop a good discharge pressure a defective cutout pressure switch is the most likely.

If its not getting up to its normal pressure dirty or defective valves in the pump are a likely cause .

Dirt in the valves should not be problem though if you have an inlet strainer.

If the system does not maintain pressure in the accumulator when the pump is switched off then dirty/ defective pump valves

All assuming no major leaks, off course, filling the bilges
Accumulator diaphragm ????
 
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