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
2.5/5
For a small or shallow pit with light inflow and a low lift, where a compact cast iron pump with no float is the priority.
- 1/3 HPMotor
- 1,740 GPHFlow at 10 ft
- DiaphragmSwitch
- 3 yearsWarranty
Check price at Amazon$213.95
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Only 6 in tall with a sealed diaphragm switch, so it fits small and shallow pits with no float to snag
- Epoxy coated cast iron housing built for continuous duty
- 25 ft cord reaches a distant outlet
- Three year warranty
Cons
- Low flow, about 1,740 gallons an hour at 10 ft, and it stops at 18 ft
- Old shaded pole motor draws 9 A, nearly twice a modern PSC pump
- Diaphragm switch cannot be adjusted
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 6-CIA (506125) |
|---|---|
| Pumping | |
| Motor | 1/3 HP |
| Type | Submersible |
| Flow at 10 ft | 1,740 GPH |
| Max lift | 18 ft |
| Discharge | 1.5 in |
| Running current | 9 A |
| Switch and build | |
| Switch | Diaphragm |
| Cast iron housing | Yes |
| Alarm or monitoring | No |
| Wi-Fi | No |
| Cord length | 25 ft |
| Warranty | 3 years |
Alternatives in this size
Superior Pump 92372
#13 in Up to 1/3 HPFull review
An inexpensive light duty pump for a basement that sees occasional water. The 1 year warranty makes it a short term choice.
Amazon $113.99$113.99
Liberty Pumps 237
#15 in Up to 1/3 HPFull review
For a narrow or shallow pit with modest inflow, where a light, compact Liberty pump with a magnetic float is enough.
Amazon $188.95$188.95
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