Why it matters
Liberty calls the 257 a workhorse: a 1/3 HP cast iron sump pump with a solid one-piece housing and epoxy powder coat. The design eliminates the lower motor seal, a common leak point.
It's rated at about 50 GPM and 21 ft of maximum head, with a two-year warranty.
Who it's for, and who should skip it
Good fit if
- Everyday basement duty
- De-watering
- Replacing an old 1/3 HP
Look elsewhere if
- Sewage or toilet waste
- Draining pools or floors (a utility pump is cheaper)
- Homes that need a backup but have only one pump
Pros and cons
Pros
- No lower motor seal
- Cast iron
- Known brand
Cons
- Price
- 2-year warranty
- Float needs pit room
Limitations to weigh
- Maximum head is where flow drops to zero; at your lift the pump moves less than its maximum flow. Size it with the sizing calculator.
- Fit a check valve on the discharge so water in the pipe doesn't fall back into the pit after each cycle.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Material | Cast Iron | Retailer |
|---|---|---|
| Dimensions (seller) | 9.6"L x 9.6"W x 10.5"H | Retailer |
| Product weight | 15.2 lb | Retailer |
| Max flow (maker) | 50 GPM | Retailer |
| Max head / lift (maker) | 21 ft | Retailer |
| Voltage | 115 V | Retailer |
| Horsepower | 1/3 HP | Retailer |
| Model number | 257 | Retailer |
| Warranty | 2 years from purchase | Retailer |
| Housing | cast iron | Retailer |
Alternatives worth comparing
More sump pumps we cover
- Zoeller M53 Mighty-Mate Sump Pump
- Zoeller M57 Mighty-Mate Sump Pump
- Wayne CDU1000 Sump Pump
- Zoeller M63 Sump Pump
All sump pumps, compared in one table · Every Liberty Pumps product we cover
Final verdict
A long-lasting 1/3 HP pump.
Where to buy
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Questions buyers ask
What is its max head?
About 21 ft.
What warranty does it have?
Two years.