Product Description
The ZOELLER m53 sump p is a fully automatic, float-operated sump pump built for residential basement sump applications. Rated at 0.30 HP and 115 volts, it delivers a maximum flow rate of 43 GPM (2,580 GPH) with a maximum head of 19 feet. The pump body, motor housing, and switch case are all cast iron for long-term durability in wet, demanding environments. A vortex-style engineered plastic impeller allows water and up to 1/2-inch spherical solids to pass freely. The unit ships with an LED plug that provides a quick visual confirmation of power status at the outlet. Every unit is factory-tested against its published performance curve before leaving the facility.
This pump is designed for continuous-duty basement sump installations where groundwater removal is the primary need. The solid white polypropylene float cannot become waterlogged, ensuring reliable automatic on/off cycling. Turn-on occurs at a water level of 7-1/4 inches and the pump shuts off at 3 inches. Oil-filled cooling and a Class B motor insulation rating support sustained operation. A 9-foot, UL-listed 3-wire grounded cord provides reach from the sump pit to a nearby outlet. Licensed plumbers and experienced contractors are the typical installers for this type of primary sump pump.
Key Features
- Cast iron pump body, motor housing, and switch case for durability in basement sump environments
- Vortex impeller handles up to 1/2-inch spherical solids without clogging
- Solid polypropylene float resists waterlogging for reliable automatic operation
- LED plug provides instant visual power confirmation at the outlet
- Auto-reset thermal overload protects the motor from overheating
- Factory submerged and tested to published performance curve before shipment
- Stainless steel hardware, float guard, switch arm, and identification tag resist corrosion
Compatibility
Designed as an OEM-style primary sump pump for residential basement sump pit applications requiring automatic float-operated groundwater removal.
Installation Notes
Installation should be performed by a licensed plumber in accordance with local plumbing codes and IPC guidelines. Disconnect power at the breaker before lowering the pump into the pit or servicing any components. Verify the discharge connection is a 1-1/2-inch NPT fitting and that the discharge line is properly routed away from the foundation. Confirm the sump pit dimensions allow adequate float travel between the 3-inch shutoff level and the 7-1/4-inch turn-on level.
Technical Specifications
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Horsepower: 0.30 HP
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Voltage: 115 volts
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Amperage: 9.7 amps
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Hertz: 60 Hz
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Phase: 1
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RPM: 1,550
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Max Flow Rate: 43 GPM (2,580 GPH)
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Maximum Head: 19 feet
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Solids Handling: 1/2-inch spherical solids
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Discharge: 1-1/2-inch NPT
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Turn-On Level: 7-1/4 inches
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Turn-Off Level: 3 inches
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Maximum Liquid Temperature: 130 degrees F
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Operation: Automatic
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Motor Type: Shaded Pole
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Motor Insulation: Class B
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Motor Protection: Auto-reset thermal overload
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Cooling: Oil filled
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Impeller Type: Vortex
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Impeller Material: Engineered Plastic
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Pump Body Material: Cast Iron
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Mechanical Seals: Carbon and ceramic
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Upper Bearing: Sleeve bearing
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Lower Bearing: Sleeve bearing
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Cord Length: 9 feet
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Cord Type: UL listed, 3-wire, grounded plug
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Height: 10.25 inches
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Length: 10.25 inches
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Width: 7.75 inches
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Weight: 23 pounds
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Warranty: 3 years
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Country of Origin: United States
Standard Information
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Brand: ZOELLER
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Manufacturer Part Number: m53 sump p
