Question about Flotec 3.4 Hp Floodmate Submersible Sump Pump

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Pump will not shut off.

My cistern pump will not shut off. It has water, it has pressure but it will not shut off. ??? Please help

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Checkyour pressure switch. My guess is the pipe that supplies the pressure is clogged. Remove it - blow it out or replace it. Of course, turn off the power first!!!!

Posted on Sep 07, 2009

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How do I stop pump from running? Cistern connected pump does not seem to be pressurizing. Pump not cutting off, and getting hot.


Pump probably needs to be serviced. It probably pressurizes a tank and when that tank reaches a pressure the pump is turned off. But just guessing.

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Causes of low rinse water pressure on a Hobart ft900-d washer


For a machine without a break-tank (a.k.a. cistern) and booster pump: check the inline debris strainer on the rinse water pipework; check you're not missing any rinse jets; check the inlet valve is fully opening.

For a boosted machine, check the pump impeller isn't disintegrating; check that the flexible hoses to the booster pump aren't collapsing internally.

For both machines: descale if you're in a hard water area.

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1 Answer

Can a Grundfos pump fail, letting water out of a cistern?


Glad you got it fixed. Hope you didn't lose all your water in the process, we've been that way at times with our little system (can only afford 450 gal of storage with 650 gal transporter, no well).

Watch those strains on the pipes and make sure any further changes have good one way flow valves for this type system, expense doesn't look so bad when the alternative is being waterless!

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1 Answer

I have an Aermotor nonsubmersible pump rpm 3450 1/2 hp model # c48b48c09 for my cistern. I thought I was out of water as I could only hear the pump humming and my washer only filled 1/2 up...but I am not...


It sounds to me like there is a hole rusted through the discharge pipe of the pump. If you are able to
look into the cistern with a flash light while the pump is running. You might see water swirling around
the pump. This means the pump is good, but the pipe is bad.

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1 Answer

Grundfos pump leaking?


If it is starting and stopping, it most likely does have some type of leak. The check vavlve is normally installed on the suction side of the pump, and sometimes instead of a check vavlve or in addition to, there is a foot valve. A foot valve is just a check valve (usually with a screen) at the end of the line in the bottom of the cistern. If you have much suction lift, and the check valve leaks (or any leak in the suction piping) then the water will drop back into the cistern. This will also cause the discharge side of the pump system to drop in pressure, causing the pump to restart. You mentioned removeing the pressure tank, that tank keeps the pump from short cycling when you have low demand on the system. If the pump is higher than the cistern, and you don't see a check valve between cistern and pump then you most likely have a foot vavle in the cistern. Hopefully it's accessable by removing the pipe.

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1 Answer

Pump pressure high pump won't shut off


This sounds like a pressure switch and if water is comming from both ends the diarpham is probally bad and it's best to get a new one.

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Air in water lines from cistern water pump in house.


sounds like you either have a leak or the water is returning into the cistern thus filling the lines with air and you getting a blast of air and water. I don't know much about them but logic tells me there should be some type of valve that keeps the water from back flowing into the cistern.

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