SumppumpPimp
In the Trades
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With your 24x30 pit, you will have 1.96" of water per every 1" in basin depth, the 1/3 hp zoeller pump is the model M53 and most of these models have a preset switch on the unit which is set at 7 1/4" on and off at 3". So basically what the pump is pumping is approximately 8 gallons of water every time it comes on, which should be rather quickly, say a few seconds of run time.
Now, if your pump has some type of piggyback switch then of course it is going to take longer to pump out. But, you need to make sure you have a 3/16" weep hole drilled into the discharge pipe to make sure the pump does not become air locked, and if this hole is not there already it could possibly make the pump prime itself longer, and thats why the pump is running for ten minutes, trying to get rid of the air first. Easy way to check is when the pump is pumping out the water, there should a small stream of water coming out of the side of the discharge pipe inside your pit.
At 15' of head the M53 model pump is going to pump out 19 GPM. Now the shut off head on this pump is at 19' and if you're at this head for the pump, then of course the GPM is going to go down considerably.
Now, if your pump has some type of piggyback switch then of course it is going to take longer to pump out. But, you need to make sure you have a 3/16" weep hole drilled into the discharge pipe to make sure the pump does not become air locked, and if this hole is not there already it could possibly make the pump prime itself longer, and thats why the pump is running for ten minutes, trying to get rid of the air first. Easy way to check is when the pump is pumping out the water, there should a small stream of water coming out of the side of the discharge pipe inside your pit.
At 15' of head the M53 model pump is going to pump out 19 GPM. Now the shut off head on this pump is at 19' and if you're at this head for the pump, then of course the GPM is going to go down considerably.