ZoellerM53 Mighty-mate Submersible Sump Pump, 1/3 Hp

The best sump pump money could buy! I've used it since 2010. Now it's 2025 and it's still running great. I'm buying another one as a backup.

Zoeller is the top of the line go to unit for sump pump installations. The heavy build and reliable operation is second to none. I would not put anything else in my sump pit, which is critical to keeping water out of my basement. Runs quiet, plenty of power without using too much electric and i know i can rely on this for many years to come.

This is the third Zoeller that I have purchased in 30 years. The other two are still running. This was replacing the second sump in the house.These are very well made pumps that aren't fancy, but they work. And for me that is the most important quality a sump pump can have.

This thing seems like a beast so far. My basement flooded a few months ago so I replaced my old sump pump with this and I've had zero problems since, even with worse weather and several flooding events. It's not the cheapest, but you get what you pay for, and this thing certainly does the job well. Easy to install, functions well, and has an excellent flow rate.

This was an older purchase.The pump is great,never had a problem and is well made.

I have hade several of these sump pumps. My home has two sumps so I need two pumps. The pumps themselves are very good quality. They last at least 5 years. HOWEVER, I have had issues with the switches that are part of the pump. They tend to fail before the pump motor. In my case, the switch failed stuck in the ON position. So I bought an external switch such as a float switch or an electronic one (electronic ones are MUCH easier to adjust). Plugging the pump into the external switch extends its life by several years. You may be able to get this pump without a built in switch and save some money and avoid the switch failure. Note the switch failure happened to BOTH my pumps.

Always works, drives water up the wall

My 19 year old Zoeller sump seemed to be shot. I looked into the almost overflowing sump and could see the pump's float switch should have turned it on, but there was all that water. I took a stick and got the switch to turn on, but when it had almost emptied the sump, there was a spray out of the side of the cast iron casting, so I figured, "the casing is shot, the switch is shot, time to get another." The attached pic shows the old pump actually cleaned up a bit after removal, when I discovered the DPDT electrical switch was really the culprit. When the new M53 arrived I also saw that that spray must be an outlet for pressure relief or water lubrication (screw driver points to this in picture); I was wrong thinking the casing was shot. Anyway, I'm happy with the replacement pump and if I get another almost 20 years out of it, I'll be super-pleased. I should note I didn't install the pump, some basement waterproofer professionals did (that's my easy out for not understanding the side-spray/broken casing mis-diagnosis... :-) ). Also, very surprisingly, removal of the rust-encrusted screws on the old pump switch compartment was very easy. So I'm gonna replace that switch, and have this old pump as a back up pump, or use it at the lake cabin for something perhaps. One final note: The old original pump has a plastic water impeller as well as plastic base (3rd picture). I might have been inclined to get the more expensive, metal impeller model but for very clean and clear basement sump water the plastic impeller proved very reliable over the last 19 years. One final, final note: since I replaced the old pump with a new model that was virtually identical, installation literally took about 15" minutes. I just had to detach the old backflow preventer (screwed on to PVC pipe), swap out the pumps, and re-attach. It was just that easy and quick. I considered a different make, a cheaper pump, but am very glad I went with the Zoeller M53.