WAYNE CDU800 Submersible Sump Pump 1/2 HP

Horsepower: 1 hp
Flow Rate: 85 gpm
Maximum Lifting Height: 20 feet
Power Source: Corded Electric

Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A durable, higher output pump worth the price if the sump pit genuinely floods hard, given its cast iron build, tested float switch and 3-year warranty.

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ASIN: B0002YVPQWModel: CDU800Category: Sump Pumps

Overview

The WAYNE CDU800 is a 1/2 HP submersible sump pump built with a cast iron and stainless steel housing, rated to move up to 5,100 gallons per hour through a 1-1/2 inch NPT discharge, backed by a 3-year warranty.

Its vertical float switch is tested to 1 million cycles, which is the component most likely to fail first in a pump that runs automatically for years. A top suction design is meant to reduce clogging and remove the need for a weep hole that some competing pumps require.

1/2 HP motor, up to 5,100 GPH pumping capacity
Cast iron and corrosion resistant stainless steel construction
Vertical float switch tested to 1 million cycles
1-1/2 in NPT discharge, USA assembled, 3-year warranty

Who it's for

Fits a basement or crawlspace sump pit that sees heavy rainfall or snow melt and needs a pump with real horsepower and a corrosion resistant housing for long term automatic use. Overkill for a small pit with only occasional, light water intrusion.

Pros and cons

Pros

High 5,100 GPH output for heavy water loads
Cast iron and stainless steel corrosion resistant build
Float switch tested to 1 million cycles
No weep hole needed thanks to top suction design

Cons

1/2 HP size may be more than a small pit needs

Performance notes

The 1/2 HP motor is rated to move up to 5,100 gallons per hour, and the vertical float switch triggers the pump automatically as water rises, with the switch tested to 1 million cycles for long term reliability. The top suction intake is designed to pull in less debris than a bottom suction design and to avoid the air lock that would otherwise require drilling a weep hole.

Specifications

Dimensions & fit
Brand	Wayne
Model	CDU800
Maximum Lifting Height	20 feet
Item Weight	12 pounds
Item Dimensions L X W X H	9 × 9 × 12 inches
Capacity & performance
Flow Rate	85 gpmhigher than 96% of 24 sump pumps
Power & efficiency
Horsepower	1 hp
Power Source	Corded Electric
Voltage	100 voltslower than 88% of 25 sump pumps
Construction & materials
Material Type	Steel
Color	Black
Included components
Unit Count	1
Included Components	Unit Instruction Guide
Warranty & support
Manufacturer Warranty Description	3 Years
Other details
Number Of Items	1
Product Style	1/2 HP Coated Steel
Item Type Name	Sump Pump
Specific Uses For Product	basement water removal