Best Sump Pumps (2026)

The CDU980E is built the way a sump pump should be: a cast iron motor housing that pulls heat out of the oil-filled motor into the surrounding water, stainless fasteners that survive years of damp, and a vertical float switch that rides up and down in a narrow track instead of swinging out and snagging on the pit wall. The 3/4 HP motor is the reason it earns the top slot, because it gives real margin when the pit fills faster than a one third horsepower pump can empty it.

The tradeoff is size and cost. A 3/4 HP pump pulls more current at startup, so it wants a dedicated circuit rather than a shared outlet with a dehumidifier. Against the Wayne CDU800 at 1/2 HP and 5,100 GPH, the extra 390 GPH on paper is small; the real gain is the longer warranty and a motor that works less hard at the same duty. If your pit has to lift water ten feet or more to a distant discharge, this is the one that keeps up.

Ownership is simple. Pull it once a year, clean the inlet screen, check that the float travels freely and test the check valve. The five-year coverage is the longest in this group and says something about the maker's confidence in the switch and seals, which are the parts that usually fail first.

The CDU790 is the straightforward answer for a typical residential pit. Top suction keeps the intake above the silt that collects on the pit floor, which cuts the amount of grit that gets dragged through the impeller and lets the pump run clear water without air-locking. The epoxy-coated steel motor housing is lighter and cheaper than cast iron, and the cast iron volute keeps the wet end rigid where wear actually happens.

Its weakness is that top suction means the pump stops pulling at a higher water level than a bottom-suction design, so a few inches of water can remain in the pit. That is fine for a drainage pit and annoying if you want a bone-dry crawlspace. Compared with the Zoeller M53, also at 1/3 HP, the Wayne trades a little cast iron heat dissipation for a lower price and a three-year warranty.

Year-three reality is mostly about the switch. Keep the pit clear of gravel and cord tangles, replace the check valve before it fails, and this pump is a ten-year machine in a house with moderate groundwater.

Zoeller has built this style of pump for decades, and the M98 shows why: a cast iron motor housing around an oil-filled motor, a vortex impeller that passes small solids without the blade-and-wear problems of a closed impeller, and a snap-action float that clicks decisively on and off. The LED on the plug is a small touch that earns its keep, since you can see at a glance whether the outlet is live when you are checking the pit with a flashlight.

It costs noticeably more than the Wayne CDU800 at the same 1/2 HP, and the spec sheet does not give it a higher flow number. What you are paying for is the vortex impeller, which keeps the spinning part out of the flow path so pebbles and sand do less damage over time, and a long track record in rental and contractor work.

For ownership, the oil-filled motor wants a pit free of standing sludge and an occasional lift-out to check the cord strain relief. The nine-foot cord is generous enough for deeper pits without an extension cord, which is one fewer failure point.

This is the pump for people who want a lot of numbers for little money. A 1 HP motor and a 4,500 GPH rating beat the 1/3 HP Wayne on paper by a wide margin, and the bottom-suction intake pulls the pit down to a thin film of water. The 1-1/4 inch discharge ships with adapters for a garden hose, so it doubles as a flooded-yard or drained-tub pump.

It is a utility pump first and a sump pump second. The thermoplastic body does not shed heat as well as cast iron, and that 4,500 GPH figure is a zero-lift number, so at a ten-foot rise the real output will be a fraction of it. There is no long warranty in the data and the float is a tethered design that can snag in a small pit, which matters if this is your only line of defence.

Use it as a backup, a secondary pit pump, or a hose-fed drain pump. For a primary pump on a pit that matters, spend the extra on the Wayne CDU980E or Zoeller M98 and keep this one on a shelf for emergencies.

At the low end of this lineup, the Lanchez gives you a 1/2 HP oil-filled motor and a 2,450 GPH rating at the lowest priceTier of the six. The oil fill carries heat to the housing, a side inlet with a metal screen keeps larger debris out of the impeller, and the multi-fit adapter means it works on a garden hose without plumbing changes.

The honest comparison is with the Wayne CDU800, which is rated at 5,100 GPH from the same 1/2 HP class. The Lanchez moves about half that on paper, uses a 1 inch discharge that chokes flow sooner at distance, and carries no long manufacturer track record. In a shallow, low-demand pit that is acceptable. In a basement with a rising water table it is the weak link.

Treat it as a budget primary for a rarely used pit or a good secondary pump. Expect to replace it sooner than the cast iron options, and check the float and check valve every spring.