Milescraft1314 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.

The media could not be loaded. Worked perfectly and has a lot of flow. Drained a 5 gallon bucket in less than 2 minutes using an electric plug in drill. I mounted it to a 2 x 4 since they recommend not holding it in your hand. My goal was to use it to get the bleach solution into my RV fresh water tank easily and it worked great for that. I even used it to get the solution in from the city water connection to make sure all the lines were sanitized properly. It pumped from the bucket through to all the faucets with very good pressure. This little pump made the job easy. I highly recommend this for short duration transfer applications.

Great little pump. The flow wasn’t quite what I expected, but may just be the diameter of the hose in using. Still works very well and doors what it’s supposed to do. Feels quality built.

This is just a rubber impeller. It's rubber fins spinning inside a rubber ring. Guess what happens when your pump is going for more than a few seconds while it's draining a long line and the liquid hasn't reached the rubber fins yet? That's right...it gets hot and starts melting the rubber. Then, it starts smoking. Then, your drill stops being able to turn the melted rubber fins inside the rubber ring that makes up what they're calling a "pump" and it starts dragging down your drill's motor. So, if you're planning on using this to pump out anything more than a cup of water, don't waste your money.

I bought this pump to transfer water from a bladder into my RV. I prime the water line so water is at the pump inlet. The first four times, it worked great (5-star great), but the fifth time, all I got out of the pump was smoke. Something melted.So, I opened the pump (They wouldn't put screws if they didn't want me to open it). The rubber paddles began to melt from the friction. I took the pump apart and cleaned the melted rubber from the metal parts with IPA. I then greased the parts with food-safe lithium grease.I put the pump back together, and it is as good as new. I'll have to remember to inspect and grease it occasionally.

Works well. Be careful about using it without mounting to a sturdy surface. The pump will twist. It should also be used with a sturdy hose. I found that when I used the pump the suction was strong and collapses the garden hose reducing the flow.

Great for my needs. Not perfect and not the easiest thing I’ve operated. But it is a simple and works great especially for the price.

Needed an inexpensive pump for ground water and this was perfect.