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
The Zoeller M53 Mighty-Mate and the Liberty Pumps S37 are evenly matched, rated 3.0 and 3.0. The Zoeller M53 Mighty-Mate leads on build. The Liberty Pumps S37 wins on value. The Liberty Pumps S37 costs $23.33 less ($165 vs $188.33).
Liberty Pumps S37
#12 in Up to 1/3 HPFull review
For a newer house or a gritty pit where a low cost Liberty pump that resists debris jams is enough.
Amazon $165$165
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 Zoeller M53 Mighty-Mate for build (cast iron motor housing, switch fits a narrow pit vs switch fits a narrow pit).
- Choose the Liberty Pumps S37 for value ($78.57 per 1,000 GPH at 10 ft ($165, 2,100 GPH) vs $92.32 per 1,000 GPH at 10 ft ($188.33, 2,040 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 | Zoeller M53 Mighty-Mate | Liberty Pumps S37 |
|---|---|---|
| Overall rating | 3.0/5 | 3.0/5 |
| Value 30% | 29 $92.32 per 1,000 GPH at 10 ft ($188.33, 2,040 GPH) | 43 $78.57 per 1,000 GPH at 10 ft ($165, 2,100 GPH) |
| Flow 30% | 36 2,040 GPH at 10 ft | 40 2,100 GPH at 10 ft |
| Build 20% | 67 cast iron motor housing, switch fits a narrow pit | 33 switch fits a narrow pit |
| Warranty 20% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Zoeller M53 Mighty-Mate | Liberty Pumps S37 | |
|---|---|---|
| Pumping | ||
| Motor | 0.3 HP | 1/3 HP |
| Type | Submersible | Submersible |
| Flow at 10 ft | 2,040 GPH | 2,100 GPH |
| Max lift | 19.2 ft | 25 ft |
| Discharge | 1.5 in | 1.5 in |
| Running current | 9.7 A | 6.5 A |
| Switch and build | ||
| Switch | Vertical float | Vertical float |
| Cast iron housing | Yes | - |
| Alarm or monitoring | No | No |
| Wi-Fi | No | No |
| Cord length | 9 ft | 10 ft |
| Weight | 21 lb | 14 lb |
| Warranty | 3 years | 3 years |