Our verdict
Pick the 257 for cast iron and a workhorse reputation. Pick the 237 if your basin is narrow: its vertical magnetic float has no arm to snag, and its aluminum housing is lighter.
The central trade-off
Housing. Cast iron for the 257; deep-finned powder-coated aluminum for the 237.
Switch. The 237's vertical magnetic float suits narrow basins.
Performance. Both list about 21 ft of maximum head; the 237 passes 3/8 in solids through a 1-1/2 in discharge.
Side by side
| Specification | Liberty Pumps 257 Sump Pump | Liberty Pumps 237 Sump Pump |
|---|---|---|
| Horsepower | 1/3 HP | 1/3 HP |
| Max flow (maker) | 50 GPM | 44 GPM |
| Max head (maker) | 21 ft | 21 ft |
| Switch | Not stated by the maker | Not stated by the maker |
| Housing | cast iron | Aluminum |
| Discharge | Not stated by the maker | 1-1/2" |
| Power cord | Not stated by the maker | Not stated by the maker |
| Weight | 15.2 lb | 11 lb |
| Warranty | 2 years from purchase | 2 years from purchase |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.
Which should you choose?
Choose the Liberty Pumps 257 Sump Pump if
- You want cast iron
- Your basin is wide enough for the float
Choose the Liberty Pumps 237 Sump Pump if
- Your basin is narrow
- You want a magnetic float