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 3.5. The Wayne CDU790 leads on warranty and flow. The Wayne SPF33 costs $8.70 less ($128.20 vs $136.90).
Wayne SPF33
#4 in Up to 1/3 HPFull review
A light, low cost pump for a shallow basement with modest water. The 1 year warranty makes it a budget pick rather than a long term one.
Amazon $128.20$128.20
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 warranty (3-year warranty vs 1-year warranty) and flow (3,060 GPH at 10 ft vs 2,718 GPH at 10 ft).
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 | Wayne SPF33 |
|---|---|---|
| Overall rating | 4.1/5 | 3.5/5 |
| Value 30% | 91 $44.74 per 1,000 GPH at 10 ft ($136.90, 3,060 GPH) | 86 $47.17 per 1,000 GPH at 10 ft ($128.20, 2,718 GPH) |
| Flow 30% | 100 3,060 GPH at 10 ft | 81 2,718 GPH at 10 ft |
| Build 20% | 33 switch fits a narrow pit | 33 switch fits a narrow pit |
| Warranty 20% | 50 3-year warranty | 0 1-year warranty |
Specifications
| Wayne CDU790 | Wayne SPF33 | |
|---|---|---|
| Pumping | ||
| Motor | 1/3 HP | 1/3 HP |
| Type | Submersible | Submersible |
| Flow at 10 ft | 3,060 GPH | 2,718 GPH |
| Flow at 0 ft | 4,600 GPH | 3,750 GPH |
| Max lift | 22.5 ft | 19 ft |
| Discharge | 1.5 in | 1.5 in |
| Switch and build | ||
| Switch | Vertical float | Vertical float |
| Cast iron housing | No | No |
| Alarm or monitoring | No | No |
| Wi-Fi | No | No |
| Cord length | 8 ft | 8 ft |
| Weight | 22 lb | 12 lb |
| Warranty | 3 years | 1 year |