Wayne CDU790
#1 in Up to 1/3 HPFull review
A strong value for an ordinary basement: more flow at 10 ft than most 1/3 HP pumps for a modest price.
Amazon $136.90$136.90
The Wayne CDU790 is the better sump pump overall, rated 4.1 to 3.7. The Wayne CDU790 leads on value. The Wayne CDU790 costs $66.94 less ($136.90 vs $203.84).
Red Lion RL-33SC
#2 in Up to 1/3 HPFull review
For a small pit with a real lift, where a compact cast iron pump with strong flow is worth a little more.
Amazon $203.84$203.84
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Wayne CDU790 for value ($44.74 per 1,000 GPH at 10 ft ($136.90, 3,060 GPH) vs $67.95 per 1,000 GPH at 10 ft ($203.84, 3,000 GPH)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 1/3 HP sump pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Wayne CDU790 | Red Lion RL-33SC |
|---|---|---|
| Overall rating | 4.1/5 | 3.7/5 |
| Value 30% | 91 $44.74 per 1,000 GPH at 10 ft ($136.90, 3,060 GPH) | 55 $67.95 per 1,000 GPH at 10 ft ($203.84, 3,000 GPH) |
| Flow 30% | 100 3,060 GPH at 10 ft | 100 3,000 GPH at 10 ft |
| Build 20% | 33 switch fits a narrow pit | 33 cast iron motor housing |
| Warranty 20% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Wayne CDU790 | Red Lion RL-33SC | |
|---|---|---|
| Pumping | ||
| Motor | 1/3 HP | 1/3 HP |
| Type | Submersible | Submersible |
| Flow at 10 ft | 3,060 GPH | 3,000 GPH |
| Flow at 0 ft | 4,600 GPH | 3,420 GPH |
| Max lift | 22.5 ft | 28 ft |
| Discharge | 1.5 in | 1.5 in |
| Running current | - | 5 A |
| Switch and build | ||
| Switch | Vertical float | Tethered float |
| Cast iron housing | No | Yes |
| Alarm or monitoring | No | No |
| Wi-Fi | No | No |
| Cord length | 8 ft | 10 ft |
| Weight | 22 lb | - |
| Warranty | 3 years | 3 years |