50 Series Sump Pumps
Automatic Sump Pump
50 Series Sump Pumps
Professional-grade, 3/10 HP submersible pump for residential dewatering (sump) or effluent (septic tank systems) use.
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
- 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.
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 | |
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Literature
Technical Support Literature
- Technical Data, 50 Series FM2778: 60 Hz
- Installation Instructions, One-Year Warranty FM0447: 60 Hz
- Installation Instructions, Three-Year Warranty FM2676: 60 Hz
- Specifications, Effluent, Simplex FM0531: 60 Hz
- Specifications, Effluent/Sump Duplex FM0530: 60 Hz
- Parts List, Model 53® (M, D, N, E) FM0472: 60 Hz
- Parts List, Model 55 (M, N ) FM0537: 60 Hz
- Parts List, Model 57 (M, D, N, E) FM0431: 60 Hz
- Parts List, Model 59 (M, D, N, E) FM0432: 60 Hz
Sales Literature
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.
