Zoeller M57 Mighty-Mate Submersible Sump Pump
- 0.33 hp, 115 volts
- Up to 2580 gallons per hour, 43 gpm listed
- 19.25 feet maximum lift
- 1.5 inch discharge, 9 ft cord, vertical float
- Cast iron, oil-filled motor
- 27.1 pounds, stainless hardware
- No Warranty listed in specs
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A tough cast iron sump pump for a basement pit that sees steady groundwater, with an automatic float and non-clogging impeller. The spec table lists no warranty, which is worth checking before buying.
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ASIN: B000RHXGCUModel: M57Category: Sump Pumps
Overview
Basement sump pits that fill with groundwater are where the Zoeller Mighty-Mate works, sitting submerged and switching itself on with a snap action float. An oil-filled motor in a cast iron housing sheds heat into the surrounding water.
Durability is the argument: cast iron housing and impeller, an oil-filled motor and stainless hardware are built to run for years in a wet pit. The spec sheet shows no warranty, and no backup power is part of the package.
Who it's for
Homeowners replacing a worn primary pump in a basement pit get a heavy-duty unit that handles small solids. Households that lose power during storms will also need a separate backup system.
Pros and cons
- Oil-filled motor dissipates heat
- Vortex impeller passes solids
- Float will not waterlog
- Stainless guard and switch arm
- No warranty listed
- Heavy for a small pump
- No battery backup included
Performance notes
Pumping rate depends on how high the water must be lifted: output is highest at a low lift and falls as head rises toward the listed maximum. The oil-filled motor passes heat through the cast iron into the pit water, which protects it during long run cycles, and the vortex impeller lets small debris through instead of jamming.
Specifications
| Brand | Zoeller |
|---|---|
| Model | M57 |
| Dimensions & fit | |
| Maximum Lifting Height | 19.25 feet |
| Discharge size | 1.5 inch |
| Cord length | 9 ft |
| Item weight | 27.1 pounds |
| Item Dimensions L X W X H | 22"L x 22"W x 36"H |
| Capacity & performance | |
| Flow Rate | 43 gpm, up to 2580 gallons per hour |
| Power & efficiency | |
| Horsepower | 0.33 hp |
| Voltage | 115 volts |
| Power Source | AC adapter |
| Construction & materials | |
| Material Type | Cast iron, stainless steel hardware |
| Included components | |
| Included Components | Product only |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | No Warranty |
| Other details | |
| Switch type | Vertical snap action float, polypropylene |
| Impeller | Non-clogging vortex, cast iron |
| Motor | Oil-filled |
| Item Highlight | 9′ Cord — Vertical Float - 1.5″ Discharge - Factory-Tested - Basement Sump Pump |
| Item Type Name | Zoeller 57-0001 M57 Basement High Capacity Sump Pump |
| Product Style | Mighty Mate |
Frequently asked questions
Is the Zoeller Mighty-Mate a battery backup pump?
No. It is a primary submersible sump pump powered at 115 volts; no battery backup is included.
Does the Zoeller Mighty-Mate turn on by itself?
Yes. A built-in snap action float switch runs it automatically without manual control.
Can the Zoeller Mighty-Mate handle debris in the pit?
The cast iron vortex impeller is described as non-clogging and passes solids easily.