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50 Series Effluent Pumps

50 Series Effluent Pumps

Effluent Pumps

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

Give your customers the reliable protection they deserve with a 50 series effluent pump — a professional category of pumps capable of effectively transferring greywater from septic tanks in no time.

We supply various models within the 50 series, including:

  • Model 53®
  • Model 55
  • Model 57 (60 Hz)
  • Model 59 (60 Hz)

While we construct each model with different materials, they all offer outstanding performance. These devices come in automatic and nonautomatic configurations and are hermetically sealed for smooth operation.

The nonclogging impeller design sets this group apart, enabling them to pump ½-inch solids at a flow rate of 43 gallons per minute (GPM) with a max head of 19 ¼ feet.

Trust in Zoeller Pump Company

Founded in 1939, Zoeller Pump Company has grown to become one of North America’s largest and oldest water pump manufacturers. Our products are designed and crafted in the USA using 95% U.S. content, resulting in tools built to stand the test of time. We thoroughly test and inspect each device ourselves to ensure exceptional performance.

As a family-owned enterprise, we strive to be the shoulder you can lean on, helping you provide homeowners with innovative commercial and residential sump pumps. We offer comprehensive one-year warranties on our 53 and 57 models and three-year warranties on our 55 and 59 models.

Find a Residential Sump Pump Distributor Today

No matter what you need, you can count on the Zoeller team to be there for you. If you want to give homeowners the high-functioning submersible pumps they deserve, you can find a Zoeller Pump Company Distributor online. Give us a call at 800-928-7867 to learn more!

Standard Features

  • 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
  • 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
  • 1 year limited warranty on 53 and 57
  • 3 year limited warranty on 55 and 59

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

Model 59 (60 Hz only)

  • Bronze 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.

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.

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