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Jet Pump fast cycle 020SHC 05-10-2007
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Posted by on May 10, 2007, 10:44 pm
I pull water from a lake and pump it up to my cottage. For some
reason, my pump has started short cycling. I changed the pressure
switch, and the pressure tank is fully charged (about 38 lbs). It is
primed. If I open the prime port and turn the pump in it shoots water
high into the air - getting water is not the problem.

When the pump comes on, it quickly builds pressure to 40 lbs and then
shuts off, pressure immediatley drops to 20, pump comes on, then off
very rapidly. Would a leak in the line between the jet pump and the
house cause this? I am thinking it might have frozen and split....


Posted by Steve Barker on May 10, 2007, 10:56 pm
You need to charge the tank with the pump off and a faucet open. Sounds
like you're water logged.

--
Steve Barker




>I pull water from a lake and pump it up to my cottage. For some
> reason, my pump has started short cycling. I changed the pressure
> switch, and the pressure tank is fully charged (about 38 lbs). It is
> primed. If I open the prime port and turn the pump in it shoots water
> high into the air - getting water is not the problem.
>
> When the pump comes on, it quickly builds pressure to 40 lbs and then
> shuts off, pressure immediatley drops to 20, pump comes on, then off
> very rapidly. Would a leak in the line between the jet pump and the
> house cause this? I am thinking it might have frozen and split....
>



Posted by on May 10, 2007, 11:06 pm
wrote:
> You need to charge the tank with the pump off and a faucet open. Sounds
> like you're water logged.

Pressure tank is charged to 38 Lbs, and not heavy - so assume not
water logged. That's why I was suspecting a leak.


Posted by tom on May 10, 2007, 11:52 pm
On May 10, 8:06 pm, 020...@gmail.com wrote:
> wrote:
>
> > You need to charge the tank with the pump off and a faucet open. Sounds
> > like you're water logged.
>
> Pressure tank is charged to 38 Lbs, and not heavy - so assume not
> water logged. That's why I was suspecting a leak.

Check valve? Tom


Posted by on May 11, 2007, 9:49 pm
On 10 May 2007 20:06:43 -0700, 020SHC@gmail.com wrote:

>wrote:
>> You need to charge the tank with the pump off and a faucet open. Sounds
>> like you're water logged.
>
>Pressure tank is charged to 38 Lbs, and not heavy - so assume not
>water logged. That's why I was suspecting a leak.

It's easy to detect a leak. Shut off everything in the house.
Preferably shut off the main valve in the house (if there is one).

Pump up to full pressure, then watch the pressure gauge. If it slowly
drops, you got a small leak. If it drops quickly, you got a big leak.

I also think you are waterlogged. Empty the tank completely and drain
the lines. NOW check the tank air pressure. Close all drain valves
and restart the pump.

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