ZoellerM63 Premium Series 5 Year Warranty Mighty-Mate Submersible Sump Pump, 1/3 Hp

My sump pumps run often, even without rain. I've tried multiple other well known brands in the past - only to have the pumps fail within a year or less. I've had a Zoeller M63 pump running without issue for 8 years - and I'm only now replacing the float switch, pump still runs great.This is the same pump that - years ago had the float get stuck, leaving the pump running dry for hours - it was so hot that it was creating steam as water entered into the sump pit - I'm amazed it didn't destroy the pump. I can't recommend zoeller enough, great quality and great customer service!

8/21 update - bought another 63 for a different location. Great pump!Original review -I've used Zoeller pumps for decades, never had an "early" failure. They used to last 15 years, now it's 5-7 years for the 5 year warranty version of this M63. I've had the 3 year warranty M53 last 5 years, but I change my pumps very 5 years.What separates this model M63 Zoeller pump from the less expensive and same HP Zoeller M53 pump is the upgraded float switch, the cast iron impeller and base (The M53 has a plastic impeller and base) and the Polypropylene Float Operated Vertical Float Switch w/ Viton® Switch Boot in the M63. The M53 has a lower grade switch and boot compared to the M63, hence the 3 year warranty for the M53 versus 5 years for his M63 pump.Pro:-5 year warranty-Solid cast iron body, base and impeller. The impeller will not crack or break as easily if it picks up sediment or small stones versus the M53-Solid polypropylene float-Lighted plug-Stainless hardware, handle and float rodCon:-Zoeller pumps used to last 10-15 years. Today, they pretty much hit in the warranty specification - 5 to 7 years for this pump. I've had M53's last 5 years. I guess Zoeller makes a lot more money selling pumps this way-Regardless of warranty, ALWAYS have a spare pump ready to go because a warranty is what's printed on the box, not what can really happen.-The Achilles heel of any sump pump is the pump switch/float set up. Either the switch wears out or the seal leaks and shorts the switch. I tried the LevelGuard switches and they are also 5 year wonders and they cost and extra $100+. I just replaced an N53 pump with a LevelGuard switch that lasted 5 years with an N63.I always have a spare M63 plumbed with the glued up 1 1/2 inch outlet pipe ready to attach to the Zoeller back flow valve. That allows me to remove the gear clamp from the back flow valve and snap in the new pump in 15 minutes in an emergency. I also have a sump alarm hooked into my alarm system that notifies if the water goes above the pump head and a whole house automatic generator so I don't have to screw with semi-lame and pricey battery back up sumps.Whenever I change out a sump pump, I print out an installation date label and attach it to the power cord at eye level so can see when its time for a pump change out.It's important to drill the 3/16" hole in the outflow pipe just at the head of the pump to prevent fluid lock. If you DON'T drill that hole, an air pocket can form around the impeller and the pump will run endlessly without pumping any water and the pump will overheat and burn out and risk a flood.Also be SURE to drill the 3/16 hole at a 45 degree angle pointed DOWN into the sump well. If you drill it at 90 degrees or point it up even a little bit, water will spray all over your cover and onto the floor. This little detail is NOT in the Zoeller install instructions and the part about the 45 degree down angle is buried in a product installation video on their website. Hope that helps!

These are the best pump options out there right now. Tried several different brands from the home improvement stores and could only get a year out of them in some cases. One of the high end brands did last about 7 years but the Zoeller pumps have been outlasting all of them. Also the Zoeller pump doesn’t seem to clog with debris like the others

I had a zoeller m53 installed (chosen by the professional basement system people) when my crawl space was encapsulated 10 years ago. I noticed its gfi recently tripped twice, I reset it and seemed ok for a day. Turns out the pump was running constantly. It was ignoring the float switch. I temporarily put a Kasa WiFi switch on the pump and controlled the pump manually and with the Kasa timer function. I could see the pump water output outside and put a WiFi camera on it for when I was away. I read reviews and found the m63 was a better version. Installations major challenge was keeping the pit dry enough to change pumps. I used a hard to prime pump to eventually empty the pit of the ground water constantly coming in plus the large amount of water released when the detached check valve emptied the piping. Fortunately the stand and discharge fittings transferred to the m63 after a small fight with the corroded screw clamps. Buttoned everything up, the m63 works perfectly. I might see if I can replace the float switch on the m53 and keep it for a just in case spare. If you need a pump, spend the small amount extra and get the m63, it has a better float switch and tougher metal impeller. Weighs a lot more too. The photo is the old m53 pump in the sump.

First of all, this is a 5 star pump. If this fits your application there is no finer pump. It looks like a precision crafted sump pump when you open it. They give it a 5 yr warranty because it is gonna last 25yrs. It runs so quiet, you won’t hardly notice it if you are in the room except the noise of the vent hole or valve closing.All that said, this will never come to you in good enough condition to install it with confidence. The 2 I ordered were shipped in a thin oversized boxes with no packing materials. The pump beat holes in the own box bouncing around inside the bigger box. The pump’s coating was damaged both times. This damage is unacceptable for a cast iron product which lives submerged in water.So I bought on locally. They order by the crate. Pump boxes are all wrapped to the crate. Forklift loading ensures it doesn’t get flipped over. The box and pump inside were in mint condition which is critical to success.Sorry. Please do not order from Amazon unless 5yr or less pump life is acceptable to you.