Liberty Pumps 257
#8 in Up to 1/3 HPFull review
For a typical basement where a long lasting cast iron pump with a reliable float matters more than raw flow.
Amazon $216.29$216.29
The Liberty Pumps 257 is the better sump pump overall, rated 3.1 to 3.0. The Liberty Pumps 257 leads on flow. The Zoeller M53 Mighty-Mate costs $27.96 less ($188.33 vs $216.29).
Zoeller M53 Mighty-Mate
#10 in Up to 1/3 HPFull review
For a typical basement where you want a proven cast iron pump that will run for years. Buyers with a lift over 15 ft should step up to a 1/2 HP pump.
Amazon $188.33$188.33
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 Liberty Pumps 257 for flow (2,220 GPH at 10 ft vs 2,040 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 | Liberty Pumps 257 | Zoeller M53 Mighty-Mate |
|---|---|---|
| Overall rating | 3.1/5 | 3.0/5 |
| Value 30% | 24 $97.43 per 1,000 GPH at 10 ft ($216.29, 2,220 GPH) | 29 $92.32 per 1,000 GPH at 10 ft ($188.33, 2,040 GPH) |
| Flow 30% | 48 2,220 GPH at 10 ft | 36 2,040 GPH at 10 ft |
| Build 20% | 67 cast iron motor housing, switch fits a narrow pit | 67 cast iron motor housing, switch fits a narrow pit |
| Warranty 20% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Liberty Pumps 257 | Zoeller M53 Mighty-Mate | |
|---|---|---|
| Pumping | ||
| Motor | 1/3 HP | 0.3 HP |
| Type | Submersible | Submersible |
| Flow at 10 ft | 2,220 GPH | 2,040 GPH |
| Max lift | 22 ft | 19.2 ft |
| Discharge | 1.5 in | 1.5 in |
| Running current | 5.2 A | 9.7 A |
| Switch and build | ||
| Switch | Vertical float | Vertical float |
| Cast iron housing | Yes | Yes |
| Alarm or monitoring | No | No |
| Wi-Fi | No | No |
| Cord length | 10 ft | 9 ft |
| Weight | 21 lb | 21 lb |
| Warranty | 3 years | 3 years |