Zoeller Pump Company

50 Series Sump Pumps

50 Series Sump Pumps

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

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
• 3 year limited warranty on Models 53 & 57
• 1 year limited warranty on Models 55 & 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 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.

NotesThe 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.