Head-to-Head Comparison · 1/3 HP Class
Liberty Pumps 257 1/3 HP Cast Iron Sump Pump vs. Superior Pump 92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit)
Engineering comparison between the Liberty Pumps 257 1/3 HP Cast Iron Sump Pump and Superior Pump 92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit). Flow curves, switch durability, and technical verdict.
92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit)
The Liberty Pumps 257 1/3 HP Cast Iron Sump Pump delivers 2,040 GPH at 10' head compared to 2,220 GPH for the Superior Pump 92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit). If your basement requires maximum flow throughput, the Superior Pump holds the hydraulic advantage. For tight sump pits, compare the minimum basin clearances: 10" vs 11".
Specification Comparison Matrix
| Specification | Liberty Pumps 257 1/3 HP Cast Iron Sump Pump | Superior Pump 92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit) | Advantage |
|---|---|---|---|
| Discharge Flow @ 10' Head | 2,040 GPH | 2,220 GPH | Superior Pump +180 GPH |
| Shut-Off Head | 21.0 ft | 24.0 ft | Superior Pump +3.0 ft |
| Switch Mechanism | VMF Magnetically-Coupled Vertical Float | Vertical Mechanical Float | Vertical Clearance |
| Housing Material | Class 25 Cast Iron | Solid Cast Iron | Thermal Heat Sink |
| Minimum Basin Diameter | 10" | 11" | Basin Fit |
| List Price | $264.00 | $194.00 | Lower Initial Cost |
Choose 257 1/3 HP Cast Iron Sump Pump If:
- You require 2,040 GPH discharge capacity at standard 10' head.
- Your installation prioritizes Class 25 Cast Iron for continuous motor heat dissipation.
- You prefer the VMF Magnetically-Coupled Vertical Float switch mechanism.
Choose 92341 1/3 HP Cast Iron Sump Pump with Vertical Switch (pro-kit) If:
- You need 2,220 GPH flow capacity at 10' dynamic head.
- Your sump pit accommodates a 11" clearance footprint.
- You favor the Vertical Mechanical Float actuation design.
Hydraulic Performance & Head Sizing
When operating at 10 feet of Total Dynamic Head, the Liberty Pumps 257 delivers 2,040 GPH versus 2,220 GPH for the Superior Pump 92341-PRO-KIT. Pumping capacity curves indicate that both models handle standard residential foundation drainage effortlessly.
Switch Technology & Pit Clearance
The Liberty Pumps employs a VMF Magnetically-Coupled Vertical Float requiring a 10" pit, whereas the Superior Pump utilizes a Vertical Mechanical Float suited for basins with at least 11" clearance. Ensuring your pit allows uninhibited float movement is essential to preventing switch hang-ups.