Have you ever dealt with a dirty water pump that just wouldn't drain the last few inches?
Is there a simple solution?
I bought a 1 HP Harbor Freight 69300 dirty water pump to drain a green pool but it won't turn on at low water levels:
Even with the obnoxious float switch manually set to permanent on, the pump stops pumping with plenty of dirty water left to pump out:
I'm currently shoveling the water into a garbage can and then pumping it out from the garbage can:
But, pumping at 50 gallons per minute, I have to constantly run to the GCFI and pull the plug to shut it off before the garbage can runs dry:
Currently I have a 2-inch pool vacuum hose connected to the 1.5-inch outlet (female NPT thread) in the steel body of the pump:
But, I'd like to see if I can jury rig *something* (a rubber hose perhaps?) to go on the *underside* unthreaded inlet of the pump:
What could I shove into that inlet which will allow the pump to go shallower than the three or four or even five inches it seems to currently stop at?
I have a few 1.5-inch NPT fittings which go on the *outlet* of the stainless steel body:
The specs for the 69300 pump seem to "imply" it drains down to 1-3/8 inches:
But, the Harbor Freight 69300 owners manual says it stops at 3 inches (it seems to stop at 3 to 5 inches or so):
Do you have a simple trick to get a dirty water pump to drain the last few inches?