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Old 10-02-2020, 04:27 PM   #1
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Water Pump Questions

Seems that my water pump is having a problem pulling from the fresh water tank. It works well if I use the winterization valve and pull water in from a bucket of water, but slows to a trickle if I switch the valve back to the tank.

I've tested the pump in isolation and it seems to work just fine.



When I pull the cap off of the intake side of the pump (circled in red above) to clean the filter out, I was surprised that there wasn't a flow of water coming from the the fresh water tank. Possible that this indicates an issue upstream of the pump?
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Old 10-03-2020, 07:14 AM   #2
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In most installations the potable water tank does not provide positive suction pressure to the pump so pulling the suction strainer cap will not allow water to flow. I would suspect you may have so debris in the tank partially blocking the suction line. I think I would try to back flush the suction line to clean anything out with the tank drain open and see if that solves the problem.
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