Liberty Pumps 250-P Submersible Sump/Effluent Pump With Float
The Liberty Pumps 250-P is a rugged 1/3 HP sump pump built with a cast-iron housing for long life and quiet operation. It includes a vertical piggyback float switch (unmounted) so the installer can set custom ON/OFF levels for ideal pump cycling. Delivers up to 50 GPM and is perfect for residential basements and crawlspace sump pits.
Key Features & Benefits
- Automatic operation with vertical piggyback float (unmounted) for adjustable activation height
- Cast-iron construction and PSC motor for durability and cooler running
- High-flow performance: up to 50 GPM (53 GPM max series rating)
- 1-1/2" NPT discharge fits standard sump plumbing
- Quick-disconnect power cord for easy service
- Submersible design for quiet operation
Applications
- Basement and crawlspace sump pits
- Residential dewatering / foundation drainage
- Use where adjustable float levels are preferred
Specifications
| Model | 250-P |
| Horsepower | 1/3 HP |
| Voltage / Phase | 115 V / 1-Phase |
| Max Flow | 50 GPM |
| Shut-Off Head | 21 ft |
| Switch Type | Vertical piggyback float (unmounted) |
| Body Material | Cast Iron |
| Discharge | 1-1/2" FNPT |
| Solids Handling | Up to 3/8" |
| Motor | PSC, oil-filled, thermal overload protected |
| Cord | Piggyback power cord |
| Warranty | 3 Years (per Liberty terms) |
Performance — GPM vs Total Head
| Total Head (ft) | 0 | 5 | 10 | 15 | 20 | Shut-Off |
|---|---|---|---|---|---|---|
| Flow (GPM) | 50 | 48 | 42 | 30 | 12 | 21 ft |
Model Comparison
| Model | Operation | Float Type | Notes |
|---|---|---|---|
| 250 | Automatic | Mounted vertical float | Standard automatic model |
| 250-P | Unmounted vertical piggyback float | Installer-adjustable ON/OFF levels | |
| 251 (Manual) | Manual | — | Requires external switch/control |
Common Questions
Q: Is the 250-P automatic?
A: It includes a piggyback float switch that provides automatic on/off once installed.
Q: Why is the float unmounted?
A: To let the installer set custom ON/OFF heights for ideal cycling in different basin depths.
Q: What discharge size does it use?
A: Standard 1-1/2" FNPT.
Q: What is the maximum performance?
A: Up to 50 GPM; shut-off head 21 ft (see spec sheet for curve).