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Ive got a shallow jet pump model sd510 it runs all the time and it pumps the water from our holding tank to sump pit it runs about 250-300 gallons through to the sump pit ive replaced the pressure switch and that still didnt do anything

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  • Joseph Lukas May 11, 2010

    What happens after 250 to 300 Gallons, does the pump stop running? What is the problem

  • mike kirschbaum
    mike kirschbaum May 11, 2010

    Sometimes a small piece of debris will get stuck in the venturi, and the pump will not pump very well. Look into the inlet of the pump; the venturi gets very small, goes all the way to the impeller.

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Just curious, why do yo9ur run water from a tank to a pit?

Where is the pressure switch located? At the pump I presume? What will increase the pressure? If you are pumping to an open pit, you will never build up any pressure? What is supposed to restrict the pump to create pressure?

You need a restriction to create pressure to turn off the pump. Is there a float valve like in your toilet in the pit? If not this would be required

Good Luck

Posted on Mar 19, 2009

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I have a 36 gallon utilitech water tank hooked to a 1/2hp shallow well jet pump my pump runs constantly and I think it's because my tank has no water in it any help would be greatly appreciated


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Hello, Our Flotec Shallow well Jet is installed in our basement a distance ( perhaps 50 feet or so from the well casing outside in the yard. The pump was installed as a replacement for a worn jet pump...


Hi, Tom, W/D here.
You shouldn't really need a check valve as the foot valve is in effect a check valve.
Next time that you are near the pump when it kicks on and you are using no water, let it achieve full pressure and kick off. Close the discharge valve, isolating the pump and suction line. Watch the pressure gauge. If the pressure falls, you either have a leak in the suction line, possibly a leak at the well head (sucking air), a leak in the casing riser pipe or bad foot valve.
If the pressure holds steady, open the discharge valve and note the pressure. If it falls immediately upon opening the valve, the leak would be on the house side if the pump. Look then for any sources of water usage (ice maker, drips in the tub, water from the pop-off valve at the water heater, etc.).
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If I can be of any further assistance, please post back.
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