Can a wet vac effectively be used as a pump to move water?
I figure if a basement floods, that this can serve as double duty.
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City employee, talked the boss into buying us a shop vac about 5 years ago ,so i saw the one with a built in "water pump",at Lowes and gave it try. Why not? Not my money if it turns out to be junk, lol. I used it to clean out one of our sump pump pits at the bottom of one of our dry wells at a sewer pump station . everything is around 40 feet straight down in the ground. We all had serious doubts about this"pump" but if it worked it would have saved several hours of work, not having to send the tank up on the hoist after filling it up to be emptied. Hooked a water hose to the pump discharge, put on the pump extension /filter in the tank,ran the water hose straight up 40 feet and about another 10 feet to the toilet. Can you believe it WORKED? ! And worked perfectly. Only once or twice i had to stop so the pump could catch up from what i was sucking up, but 2.5 inch suction hose VS. 5/8 inch discharge, plus the height, man you can not ask for better. It was a full stream and lots of pressure on the discharge side,probably could have pumped 80 feet straight up. 5 out of 5 stars. Buy it. I protect that shop vac like its my own,dont want any monkeys screwing it up.
Some Shop Vacs have a "water pump" feature. You can attach a garden hose to a side port on the vac, and rather than just dumping the water in the canister, it will actually pump the water to another location.
If you do not have such a vac, you can suck water until the canister fills up. Then you have to dump the water somewhere. (Note: A shop vac full of water is really heavy.)
Drill a hole near the bottom of the vac canister and plug it; when the canister is half full remove the plug and water will drain out of the canister but still keep a vacuum as long as water doesn't empty. Size the hole properly: not so small that the canister fills, or so large that it empties too quickly.
I fit a 5-gallon bucket with check valve in the bottom, and water intake near top, and vacuum connection in another hole in top. I apply vacuum to fill bucket, and the check valve stops air from coming in, then stop vacuum to let drain out bottom through check valve. Put on timer on/off for continuous pumping.