Sump pump

[tthh]

Separate float switch is the way to go. Much more flexible setup.

 

[Sea Nile]

Simple setups with float control in line with the motor have no delays. They instantly turn on or off when water level causes float to hit upper or lower setting. You need more advanced controls if you want delays in the operation scheme.

Absolutely, I agree. Wasn't trying to contradict anyone, I just wanted to point out that these options exist

 

[infinity]

Separate float switch is the way to go. Much more flexible setup.

I agree, this is what I used to get the float well above the pump which limits cycling.

 

[kwired]

I agree, this is what I used to get the float well above the pump which limits cycling.

View attachment 2561968

If the float has limited travel range like the one you posted appears to have, it pumps X inches of water each cycle regardless what elevation it is placed within the sump.

 

[infinity]

If the float has limited travel range like the one you posted appears to have, it pumps X inches of water each cycle regardless what elevation it is placed within the sump.

That's incorrect. It has a built in OFF time delay so that even when the water level decreases and the float switch is open the pump still runs depending on the time delay setting.

 

[kwired]

That's incorrect. It has a built in OFF time delay so that even when the water level decreases and the float switch is open the pump still runs depending on the time delay setting.

Gotcha, though it still pumps X inches of water regardless of elevation in sump before switch actuates. After that it depends on time setting as well as possible timing range and volume of sump. Too much time delay and you can run the pump dry, though that probably doesn't hurt most these pumps.

 

[GoldDigger]

Gotcha, though it still pumps X inches of water regardless of elevation in sump before switch actuates. After that it depends on time setting as well as possible timing range and volume of sump. Too much time delay and you can run the pump dry, though that probably doesn't hurt most these pumps.

Post #54 clearly set out the situation where the low water level is below the pipes feeding into the sump.
In this case 6" of height above the inlet level will correspond to a smaller water volume than 6" of height which includes the inlet pipes.
A greater volume of water moved corresponds to a longer time until the sump refills to the point where the pump restarts.