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  3. 50 Series Sump Pumps
Sump and Effluent Pumps

50 Series Sump Pumps

Automatic Sump Pump

Sump and Effluent Pumps // Residential Use Sump Pumps // Mighty-Mate

50 Series Sump Pumps

Professional-grade, 3/10 HP submersible pump for residential dewatering (sump) or effluent (septic tank systems) use.

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Features and Benefits

Standard Features

  • Float-operated, submersible, 2-pole mechanical switch and variable level, long-cycle systems available
  • Corrosion-resistant, powder-coated epoxy finish
  • No sheet metal parts to rust or corrode
  • Stainless steel screws, switch arm, guard, and handle
  • No screens to clog
  • Watertight, neoprene square ring between motor and pump housing
  • Solid, buoyant, polypropylene float
  • Oil-filled, hermetically-sealed, automatic reset thermal overload protected motor
  • Upper and lower sleeve bearings running in bath of oil
  • Entire unit pressure-tested after assembly
  • Carbon and ceramic shaft seal
  • Maximum temperature for effluent or dewatering: 130 °F (54 °C)
  • Passes 1/2” (13 mm) spherical solids
  • 1-1/2” NPT discharge
  • On point: 7-1/4” (18 cm)
  • Off point: 3” (8 cm)
  • Major width: 10-3/32" (26.2 cm)
  • Major height: 10-1/16" (25.6 cm)
  • Watertight and dust-tight

Within this series exist several distinct models. Though performance remains the same, the pumps' material construction is what varies. What are the differences between each model? Glad you asked...

Model 53®

  • Cast iron switch case, motor and pump housing
  • Engineered thermoplastic base
  • Engineered, glass-filled, plastic impeller with metal insert
  • Stainless steel guard and handle
  • Cast iron sleeve bearings

Model 55

  • Bronze switch case, motor and pump housing
  • Engineered thermoplastic base
  • Engineered, glass-filled, plastic impeller with metal insert
  • Stainless steel guard and handle
  • Bronze sleeve bearings

Model 57 (60 Hz only)

  • Cast iron switch case, housings, base, and impeller
  • Stainless steel guard and handle
  • Cast iron sleeve bearings

Model 59 (60 Hz only)

  • Bronze switch case, housings, base, and impeller
  • Stainless steel guard and handle
  • Bronze sleeve bearings

Consult Factory for Special Applications:

  • Variable level float switches
  • Variable level long cycle systems
  • Special cord lengths of 15’, 25’ or 35’ (5 m, 8 m or 11 m). 50' (15 m) cord lengths available for 230 V units only.
  • Alarm systems
  • Duplex systems
  • Variable level control systems.

Notes 
The sizing of effluent systems normally requires variable level float(s) controls and properly sized basins to achieve required pumping cycles or dosing timers with non automatic pumps.

Reserve Powered Design.
For unusual conditions a reserve safety factor is engineered into the design of every Zoeller pump.

Product Specifications

Motor 3/10 HP
Voltage 115 or 230 V
Phase 1 Ph
Hertz 60 Hz
RPM 1550 RPM
Type Shaded pole
Insulation Class B
Amps 4.8 - 9.7 Amps
Operation Automatic or nonautomatic
Auto On / Off Points 7-1/4" / 3" (18.4 cm / 7.6 cm)
Discharge Size 1-1/2" NPT
Solids Handling 1/2" (12 mm) spherical solids
Cord Length 9' (3 m) auto, 15' (5 m) nonauto
Cord Type UL listed, 3-wire cord and plug
Max Head 19.25' (5.9 m)
Max Flow Rate 43 GPM (163 LPM)
Max Operating Temperature 130 °F (54 °C)
Cooling Oil filled
Motor Protection Auto reset thermal overload
Cap Cast iron or bronze
Motor Housing Cast iron or bronze
Pump Housing Cast iron or bronze
Base Cast iron, bronze or engineered thermoplastic
Upper Bearing Sleeve bearing
Lower Bearing Sleeve bearing
Mechanical Seals Carbon and ceramic
Impeller Type Non-clogging vortex
Impeller Plastic, cast iron or bronze
Hardware Stainless steel
Motor Shaft AISI 1215 cold roll steel
Gasket Neoprene
  • cCSAus
  • Powder Coated Tough
  • SSPMA
  • UL

Technical Data

Caution

All installation of controls, protection devices and wiring should be done by a qualified licensed electrician. All electrical and safety codes should be followed including the most recent National Electrical Code (NEC) and the Occupational Safety and Health Act (OSHA).

Selection Guide

  1. To select an appropriate basin, go to Basins.

Accessories

Model Comparison Charts

  • Product Model Comparison Chart: 60hz
    model seal mode volts phase amps hp hz lbs kg
    M53® / M55 Single Auto 115 1 9.7 3/10 60 23 10
    N53® / N55 Single Non 115 1 9.7 3/10 60 23 10
    BN53® Single Auto 115 1 9.7 3/10 60 25 11
    BE53® / BE57 Single Auto 230 1 4.8 3/10 60 24 /30 11/13
    D53® Single Auto 230 1 4.8 3/10 60 23 10
    E53® Single Non 230 1 4.8 3/10 60 22 10
    M57 / M59 Single Auto 115 1 9.7 3/10 60 29 / 33 13 / 15
    N57 / N59 Single None 115 1 9.7 3/10 60 28 / 29 12 / 13
    BN57 Single Auto 115 1 9.7 3/10 60 30 13
    D57 / D59 Single Auto 230 1 4.8 3/10 60 30 / 33 13 / 15
    E57 / E59 Single Non 230 1 4.8 3/10 60 28 / 29 12 /13
    E59 Single Non 230 1 4.8 3/10 60 29 13

    Additional cord lengths are available in 15' (5 m), 25' (8 m) and 35' (11 m).  50' (15 m) cord lengths available for 230 V units only.
    BE and BN models include a piggyback variable level pump switch. Model 53®: cast iron switch case, motor and pump housing, and a glass-filled plastic impeller. Model 57: cast iron construction with a cast iron impeller. Model 55: bronze switch case, motor and pump housing, and a glass-filled plastic impeller. Model 59: bronze construction with a bronze impeller.
    Optional pump stand (P/N 10-2421). The stand, made of durable, non-corrosive ABS, attaches securely to the pump and is intended to reduce clogging by debris, eliminate the need for bricks or blocks under the pump, and provide the ability to raise the intake by adding sections of 1-1/2" or 2" (DN40 or DN50) PVC.

Pump Performance Curves

Design Tools