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 and the Zoeller M63 Premium are evenly matched, rated 3.1 and 3.0. The Liberty Pumps 257 leads on value and flow. The Zoeller M63 Premium wins on warranty. The Liberty Pumps 257 costs $94.96 less ($216.29 vs $311.25).
Zoeller M63 Premium
#9 in Up to 1/3 HPFull review
For owners who want the longest lasting 1/3 HP class pump and are willing to pay for an all cast iron build and a 5 year warranty.
Amazon $311.25$311.25
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 value ($97.43 per 1,000 GPH at 10 ft ($216.29, 2,220 GPH) vs $152.57 per 1,000 GPH at 10 ft ($311.25, 2,040 GPH)) and flow (2,220 GPH at 10 ft vs 2,040 GPH at 10 ft).
- Choose the Zoeller M63 Premium for warranty (5-year warranty vs 3-year warranty).
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 M63 Premium |
|---|---|---|
| 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) | 0 $152.57 per 1,000 GPH at 10 ft ($311.25, 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 | 100 5-year warranty |
Specifications
| Liberty Pumps 257 | Zoeller M63 Premium | |
|---|---|---|
| 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 | 23 lb |
| Warranty | 3 years | 5 years |