Red Lion RL-SP33V
#5 in Up to 1/3 HPFull review
For a narrow pit on a budget, where a light pump with good flow and a vertical float does the job.
Amazon $114.99$114.99
The Red Lion RL-SP33V rates 3.4 among up to 1/3 HP sump pumps; the Liberty Pumps 457 rates 2.4 among 1/2 HP and up ones. The Red Lion RL-SP33V costs $128.06 less ($114.99 vs $243.05).
Liberty Pumps 457
#17 in 1/2 HP and upFull review
For a narrow pit that needs more lift than a 1/3 HP pump, where a light pump with a magnetic float is preferred over cast iron.
Amazon $243.05$243.05
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.
Scores side by side
These two sit in different size classes (up to 1/3 HP and 1/2 HP and up), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Red Lion RL-SP33V | Liberty Pumps 457 |
|---|---|---|
| Overall rating | 3.4/5 | 2.4/5 |
| Value 30% | 83 $48.60 per 1,000 GPH at 10 ft ($114.99, 2,366 GPH) | 29 $92.06 per 1,000 GPH at 10 ft ($243.05, 2,640 GPH) |
| Flow 30% | 58 2,366 GPH at 10 ft | 6 2,640 GPH at 10 ft |
| Build 20% | 33 switch fits a narrow pit | 33 switch fits a narrow pit |
| Warranty 20% | 25 2-year warranty | 50 3-year warranty |
Specifications
| Red Lion RL-SP33V | Liberty Pumps 457 | |
|---|---|---|
| Pumping | ||
| Motor | 1/3 HP | 1/2 HP |
| Type | Submersible | Submersible |
| Flow at 10 ft | 2,366 GPH | 2,640 GPH |
| Flow at 0 ft | 3,137 GPH | 3,180 GPH |
| Max lift | 26 ft | 34 ft |
| Discharge | 1.5 in | 1.5 in |
| Running current | 4.4 A | 7.3 A |
| 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 | 25 ft |
| Weight | - | 12.5 lb |
| Warranty | 2 years | 3 years |