Milescraft 1314 DrillPump750 - Self Priming Water Pump Attachment for Drills - Water Transfer Pump - Uses Common Garden Hose - 750 Gallons per Hour

I was on the fence between four and five stars, but sided on five as the pump did what it claimed to do and did it well, but I also checked a thing or two before putting it into use, which is where the potential star loss comes in. But since the listing does make a passing mention of it...This is a simple pump design, one that has been in use for centuries, in many different applications and various forms. It's actually not far off from how some oil pumps work in automobiles, or the motor in air tools. In this case, it's what is called an unbalanced vane pump. Go look it up if you want to know how it works. In this design, the rotor is a stiff rubber and the veins bend over when they reach the small side of the chamber. This also makes it non-directional in it's flow, just move it in a given direction slowly a bit to give the veins time to bend in the correct direction before 'giving it the beans' (and make sure it's greased first, more on this below). Just remember the flow is going to be opposite of the direction the drill spins when looking at it from 'behind' the drill.This is driven by a plastic cog attached to the drive shaft that has 'teeth' cut into in that match a small hole in the middle of the main rotor. If the rotor ever got jammed, you would want this part to give out and let the shaft spin free, not the drill you are holding on to.The design is better than most I have seen, with the body using screws to hold it together. This makes it able to be repaired if the rotor ever fails, and future maintenance is able to be easily performed. The front plate (red part) has a gasket to seal it, and a metal plate sandwiches the rotor to the main body behind the front plate. Don't be afraid to open it up, there isn't anything that is spring loaded inside, and it is easy to disassemble and reassemble, just mind that you don't loose the screws or the one shaft guide piece that sits on top of the plate.And that leads into what the listing should put more importance on and the one caveat I found, grease. When I opened mine up, I found what I would consider a very inadequate amount of grease, and it was the generic beige stuff. I immediately greased it with some silicon based stuff I had (*not* spray!), covering the sides of the rotor, the gasket and the shaft where it rides on the housing.I could see this pump overheating and potentially 'smoking' if it was used long enough at speed with the very small amount of grease it arrived with. But in my experience once I greased with what I would consider an OK amount, it worked very well and self primed (the inlet hose was about 8 feet long and the pump was above the water source by a foot or so).Time will tell how well the rubber rotor holds up, but at this time I'm pretty confident that it will last. I would only suggest that one 'spins' it every so often to keep the rotor veins from getting 'stuck' in the bent over direction.

I've only used it once to drain water out of holes I dug to deck blocks. It worked exactly as intended. I am applying silicone grease (actually dielectric grease) inside the pump to hopefully allow it to work for years, after reading some of the other comments on here.

I literally expected this to either not work at all or burn up after running for a few minutes. To my pleasant surprise, it ran non-stop for a full hour without issues. There are a couple of caveats though. 1) You must screw this down on a board to serve as an anti-torque base so that your drill doesn't flip over. 2) You must disassemble it and lube it with silicone grease before and after you use it. 3) If you don't use it somewhat regularly, the rubber impeller is likely to take a "set" and not work well. This is no substitute for real submersible pump, but it's very handy in a pinch if you set it up correctly.

Burned up within 15 minutes of use and smoked. Do not buy. Waste of time and money. You have to continually keep drill on in order for it to work but mine smoked within 15 minutes and heated up and will not run. Never got water to flow.

I actually have two of these: after hurricane Helene here in GA, there was no power for about seven days, but lots of pools of water here and there, inside and outside that needed to be pumped out with battery power (Milwaukee cordless drills in my case). Our freezer had completely melted and was dripping a lot of water on the wood floor in our kitchen (I know, I know... who puts wood floors in the kitchen? Well, I do – I like the warmth, and tile is too damn loud in that space).This one comes with holes to mount it, and that's a good idea – there's considerable torque when using it, and mounting it to a scrap piece of plywood that allows you to step on it as you use the pump really stabilizes things.It takes normal garden hose fittings, so if you've got some scrap hose around it will work fine. I love the hose thing because you can make custom pumps for each occasion – if you get into it, you can create some very sophisticated hose ends for sucking up water from an overflowing toilet, a washing machine/dishwasher that has gone rabid, leaking pipes, or you know, the next hurricane.Cheap, extremely handy, and elegant in its simplicity. A must-have in my opinion

Ran the following throughput test: Positioned the pump at approximately the same height as the top of a 5 gallon bucket. Used to a 3 foot washing machine connection hose as a pick up tube with one end at the bottom of the 5 gallon bucket and the other attached to the pump. The pump output was aimed diagonally downward from there into an open sink without any hose attached, so there was no back pressure. My Milwaukee drill has a maximum rated speed of 1700 RPM with a fresh drill battery. Before the test, some water was pumped out of the bucket to make sure that the pump and the pick up hose were already primed, then the bucket was refilled. It pumped out the entire contents of the bucket in approximately 55 seconds. That is a rate of 11 seconds per gallon, or 5.5 GPM, or 327 GPH. That’s without even trying to raise the level of the water.That’s not even half the advertised throughput. My drill speed was not calibrated with any measuring equipment, but it was moving at a fast rate with a fresh battery and I think that it’s a good real world test. This is a handy little pump to have around, and I suspect the competitors are about the same performance. Keeping it anyway.

This little pump did the trick for me. Digging hole in basement for sump pump that kept filling up so when I would strike down with fence hole digger would splash me. A little stiff at first but drained 20 gallon pit out in minutes.