The 10 Best Sump Pumps
Updated by · How we research
Ten sump pumps and backup systems compared on flow at a real lift, float design, housing and warranty. The Zoeller M53 Mighty-Mate leads for most basements. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki.
The gallons-per-hour figure on a sump pump box is measured with no lift at all, and a real basement makes the pump push water several feet up and outside, where some models lose a third of their flow. This guide is for homeowners replacing a tired pump, sizing a first one, or adding backup for storm outages.
Editor's Notes
November 1, 2026, by Ezvid Wiki Admin:
The Zoeller M53 Mighty-Mate takes the top spot. It's a cast-iron, oil-cooled 1/3-horsepower pump that home-improvement guides keep naming first, and it's the right size for most basements. The Wayne CDU790 is the value pick, and the Wayne CDU980E is for basements where the pump never seems to rest.
Three earlier picks stay: the Wayne WSS30VN kit, the Basement Watchdog Special CONNECT and the Liberty SumpJet SJ10, because a pump without backup power is only half a plan in storm season. We dropped the Zoeller M267 Waste-Mate, which is a sewage pump, and the Red Lion 14942746, Zoeller 57-0001 and Wayne 57729, which we couldn't find for sale. The Eco-Flo ECD50V and Pentair Flotec FPZS50T had too little owner history to trust in a pit you can't see.
Where makers publish flow charts, we compared pumps at a 10-foot lift instead of the zero-lift number on the box, matched float styles to pit widths, and checked every brand against CPSC recall records, which turned up a 2020 fire recall of Utilitech, Do It and Star Water Systems pumps, none of them here.
April 01, 2021:
These rankings still looked to be in pretty good shape, and so we didn’t find a lot of need to make major changes. Believing that the last editor for this list put together an appropriate mix of quality options – including some rugged, cast-iron models like the Red Lion 14942746 and Zoeller M267 Waste-Mate, as well as Wi-Fi-connectable choices like the Wayne Combination WSS30VN and Basement Watchdog BWSP – and observing no strong, new contenders for the category, we left our list largely untouched, although we did notice that the Wayne CICDU900 wasn’t available at the time of this writing.
Since our rankings already included two options from this reputable company (both mentioned in the previous paragraph), we had no problem switching the CICDU900 out for the Pentair Flotec FPZS50T — a wallet-friendly option from a company that’s better known for its high-quality pool pumps. Apart from its price, we found the FPZS50T to be a fairly capable option, based on its 22-foot maximum lift and 4,200-gallons-per-hour maximum flow rate, but it should be noted that it’s thermoplastic housing will not be as durable as some cast-iron alternatives.
We still decided to include it, under the assumption that this pump is unlikely to be handled or battered about much during its life, and recognizing that some users might go as far as preferring a polymer construction for wet equipment. However, because of the combination of its plastic body and the fact that it can only pass small solids, up to a maximum width of 3/16 inch, the spot this option earned was quite low on our list.
If you’re looking for a utility pump that can be submerged, but you don’t require the automation that’s a prerequisite for this category, then you might have better luck with our list of submersible pumps.
February 05, 2020:
You want to prioritize your buying decisions around reliability, since the warranty on your pump isn’t as valuable as it is with many other products, as most of the work (or cost) is in the installation - if the pump fails, you’re the one who’s going to have to get it out. Plus, you can only tell its failed once your basin’s flooded, and that’s when you need the pump the most! So, you really shouldn’t care about warranties as much with pumps. Material considerations though, are important, and I’ve purged this list of all the thermoplastic options with the exception of one option I’ve left – the Wayne 57729 - because it’s a highly recommended model from a good brand, and it has a nice electronic-switch mechanism, though I’ve demoted it to last place. The reason is that, while on paper, some plastics may look strong, in practice, thermoplastic pumps tend to crack and develop commonly-reported issues over time from the high pressure. Cast iron is a much better choice.
I’ve also gotten rid of pumps that I think would get jammed in the process of filtering out rocks and debris from sump water; fortunately, there was only one pump with a base that would likely get jammed, and it was also thermoplastic. Since all the options in the list before the update were electric (motor-run, primary) pumps, I wanted to include one or two good backup (secondary) options, the first of which is the powerful, battery-operated Basement Watchdog BWSP (a brand which makes some very good backup options), and the second is the water-‘powered’ Liberty SJ10.
I’ve also included a combination pump – the Wayne Combination WSS30VN of which the electrically-operated primary system should give you 85 GPM @ 0' (58 GPM @ 10'), and the battery-operated secondary system will give you around 48 GPM @ 0'. I only wanted to include variety where practical, so I’ve refrained from adding any pedestal pumps, because submersible pumps are generally a lot better and more reliable. Also, since all the remaining primary pumps are reliable, I’ve reordered the list to roughly reflect the value for money that they deliver, i.e. cost / capacity (GPM @ 10’ lift).
I don’t want to talk too much about switches, but while these pumps all have decent vertical floats, no switch is immune to getting caught (tethered floats usually have this issue) or filling up with water (if the buoy is hollow), so it’s always handy to install an electronic water-level sensor if you can, like a magnetic float switch.
Sizing: Horsepower, Flow And Lift
An oversized pump in a small pit empties it in seconds, shuts off, and starts again moments later.
Most homes need less pump than the box suggests. This Old House puts a 1/3-horsepower pump in the right range for most basements, 1/2 horsepower for pits that fill often, and 3/4 horsepower or more for a high water table or a long, steep discharge run.
Read the flow chart, not the headline number. The gallons per hour printed on the box are measured at zero lift, with the pump pushing water nowhere. Your pump has to lift water from the pit floor up and out through the wall, often around 10 feet. Wayne's own chart for the CDU790 shows about 77 gallons a minute at zero lift and about 51 at 10 feet. Sump Pump Central lists the Zoeller M53 at about 2,580 gallons an hour at 5 feet and 2,040 at 10 feet.
Bigger isn't automatically better. An oversized pump in a small pit empties it in seconds, shuts off, and starts again moments later. That short-cycling wears the float switch and the motor. If your current pump keeps up and runs a minute or so per cycle, replace it with the same size.
Cast Iron, Plastic Or Pedestal, And The Float
Cast iron is the material to want for a pump that runs often. Consumer Reports notes that cast iron sheds heat better, lasts longer and runs quieter. Thermoplastic pumps are lighter, cost less and can't rust, which makes them good spares or light-duty pumps. Coated steel shells sit in between and depend on the coating staying intact.
A submersible pump sits in the water and is quiet. This Old House puts its typical life at about 8 to 12 years. A pedestal pump keeps its motor on a column above the pit. It's louder and needs headroom, but it's easier to service and often lasts 15 to 20 years.
The float switch is the part that fails most. An arm or tethered float swings through an arc and needs a pit wide enough to move freely; in a narrow pit it can catch on the wall or the discharge pipe. A vertical float rides up and down a rod and fits pits about 10 to 11 inches across. Sump Pump Central says float switches commonly wear out around year seven or eight, so a pump of that age deserves a close look.
Backup Power, Installation And Upkeep
A main pump does nothing when the power goes out, and the storms that flood basements often cut power too. A battery backup is a small 12-volt pump with a charger, a battery and an alarm. Plan on replacing the battery every few years and testing the system monthly. Combination kits that hold both pumps usually need a basin 16 inches or wider. A water-powered backup uses city water pressure instead of a battery; it won't help on a private well, it uses a lot of tap water, and some towns restrict it, so check local code.
Plug the pump into its own grounded, GFCI-protected outlet, never an extension cord, and keep the plug above any possible water line. Put a check valve in the discharge pipe so water doesn't fall back into the pit and restart the pump (This Old House). Send the discharge well away from the foundation; many towns forbid piping it into the sewer.
Test the pump a couple of times a year by filling the pit with a bucket of water, and clean out silt while you're there. Avoid off-brand pumps with no maker records: in 2020, the CPSC announced a recall of about 33,000 Utilitech, Do It and Star Water Systems sump pumps that could overheat and catch fire.
How we researched this
We compared 21 sump pumps and backup systems, read the makers' specs, flow charts and warranty terms for the 10 finalists, used This Old House's research-based guide and the Consumer Reports buying guide for sizing and materials, analyzed owner feedback for float and early-failure patterns, and checked every brand against CPSC recall records.
Frequently asked questions
What size sump pump do I need?
A 1/3-horsepower pump handles most basements. Choose 1/2 horsepower if the pit fills often, and 3/4 horsepower or more for a high water table. Compare flow at a 10-foot lift, not the zero-lift figure on the box.
How long does a sump pump last?
A submersible pump usually lasts about 8 to 12 years, and a pedestal pump 15 to 20. The float switch often wears out first, so test the pump twice a year.
Is a cast-iron sump pump better than a plastic one?
For a pump that runs often, yes. Cast iron sheds heat, lasts longer and runs quieter. Plastic pumps are lighter, cheaper and can't rust, so they suit light-duty pits and spare duty.
Should I get a battery backup or a water-powered backup?
A battery backup works in any home but needs a battery every few years and monthly testing. A water-powered backup needs no electricity but only works on city water with enough pressure, and it uses a lot of water.
Can I plug a sump pump into an extension cord?
No. Use a dedicated grounded, GFCI-protected outlet, and keep the plug and cord above any possible water line.
What's the difference between a sump pump and a sewage pump?
A sump pump moves groundwater with small grit. A sewage pump, such as a Zoeller Waste-Mate, is built to pass solids about 2 inches across from a toilet or drain line. Don't swap one for the other.
