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
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

Technical Information

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.

50 Series Sump Pumps

50 Series Sump Pumps