Wayne CDU800 Review (2026): Specs, Pros & Cons

Last updated: September 30, 2026  ·  Reviewed by the Sump Pump Central editorial team.

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Bottom line:At 1/2 HP and 5,100 GPH, it out-flows the Zoeller M53 on paper while costing about the same, and its top-suction design eliminates the weep hole most competitors require. If that feature set matches your pit, it’s our pick.

Wayne has been making basement water-protection products for decades, and the CDU800 is the company’s mainstream 1/2 HP submersible — the direct sibling of the higher-capacity CDU980E we’ve already reviewed.

Why the CDU800 rates so highly

Two engineering choices stand out. First, the CDU800 uses a top-suction design instead of the more common side- or bottom-suction layout. That matters because top-suction pumps don’t need a weep hole (the small drilled hole that prevents air lock) — Wayne’s design eliminates air lock without one, which simplifies installation and removes a common failure point where debris clogs the weep hole over time. Second, the float switch is tested to 1 million cycles before the pump ever ships, which is Wayne’s way of proving out the single component most likely to fail first in any sump pump.

The housing combines a cast iron pump body with a corrosion-resistant steel motor shell, and at 5,100 GPH it moves noticeably more water than the Zoeller M53’s 2,580 GPH — though the M53’s advantage has always been an oil-filled cast-iron motor built for extreme longevity rather than peak flow. The CDU800 is the higher-flow, higher-rated, similarly-priced alternative.

Wayne CDU800: Full Specs

What we like

No weep hole to maintain. One less thing to drill correctly during install, and one less place for the pit’s debris to clog over time and cause air lock.

Strong flow-to-price ratio. 5,100 GPH at this price undercuts several lower-flow competitors dollar for GPH.

Code-compliant discharge and solid warranty. The 1-1/2″ NPT discharge meets standard code, and 3 years is on par with or better than most pumps at this price.

What to be aware of

Steel motor housing, not full cast iron. The CDU800 pairs a cast iron pump volute with a steel (not cast iron) motor shell. It’s corrosion-resistant and well-built, but if your priority is maximum heat dissipation for near-continuous cycling, Zoeller’s fully cast-iron, oil-filled M53 is the more purpose-built option for that specific job.

20 ft max lift is moderate. If your discharge line runs a long horizontal distance or up multiple stories, compare this against the CDU1000’s flow figures before assuming the CDU800 has enough head pressure for your layout.

Who should buy the Wayne CDU800

If you want a 1/2 HP cast iron and stainless steel pump at a fair price, this is a strong pick. It’s an excellent primary pump for a standard residential basement and pairs well with a battery backup system like the ones in our best battery backup sump pumps guide.

What pairs well with the Wayne CDU800

A cast iron primary is built to last, but it can’t help you during a power outage. The Basement Watchdog BWSP is a natural backup pairing for the CDU800 — it sits alongside it in the pit and kicks in automatically if the power goes out or the primary fails.

Frequently asked questions

Is the Wayne CDU800 better than the Zoeller M53?
It’s the bigger pump (1/2 HP vs. 1/3 HP) and moves more water, while the M53 is a smaller 1/3 HP pump with an oil-filled cast iron motor and remains our top overall pick. For most residential basements, either is an excellent choice.

Does it need a weep hole?
No. The top-suction design is engineered to prevent air lock without one.

What’s the difference between the CDU800 and CDU980E?
The CDU980E is the 3/4 HP step-up model with a higher 5,245 GPH flow rate and longer 5-year warranty; the CDU800 is the 1/2 HP model at a lower price point.

Our verdict

The Wayne CDU800 backs up its specs with strong engineering choices. It’s an easy recommendation for most basements.