SP50

Submersible Sewage
Ejector Pump
• Continuous Duty Rated
• Residential Sewage
• High-Capacity Sump
• Septic Tank Effluent
SP50 - Submersible Sewage Ejector Pump

FEATURES
The Hydromatic SP50 submersible pump is specifically designed to meet the demands of
handling wastewater and sewage in residential and commercial building applications. The
2 inch NPT discharge pump (3 inch discharge optional) is available with a powerful 1/2
horsepower motor, in both automatic and manual configurations; and can handle capacities up to
150 gallons per minute and heads to 29 feet.
The SP50 features a heavy-duty cast iron construction
that provides durability in rugged applications, as well as
assists in dissipating heat from the motor, for
cooler operation. It is also available in an all bronze
model. The pump s non-clog, non-corrosive,
cast iron impeller, which is threaded to a nickel
plated steel shaft, provides long life even in
demanding applications; and is capable of
handling spherical solids up to 1-1/2 inches and
lint. The SP50 also features precision, carbon
and ceramic-faced mechanical shaft seals that
are extensively lapped, providing for a long,
leakproof life.
The SP50 s oil-filled motor provides
superior cooling characteristics, allowing the
motor to run cool and quiet for years. This
oil-filled design also provides permanent
lubrication of the shaft bearings, minimizing
maintenance and extending the service life of
the pump. In addition, to protect against
overheating, the motor windings contain an
automatic reset thermal overload (1 Ø).
Water level is controlled on
automatic models by
Hydromatic s proven
diaphragm type pressure
switch, which is sealed in a
water tight thermoplastic
housing. Double diaphragm
construction provides added
protection by preventing
liquid or foreign matter from
entering switch.

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SP50 - Submersible Sewage Ejector Pump

BENEFITS
A. Water-resistant power cord with molded plug is available
in 10 or 20 foot lengths, and is easily field serviceable.

B. Oil-filled motor provides superior cooling and permanent

lubrication of bearings minimizing maintenance and
extending service life.

C. Powerful 1/2 HP motor provides cool and quiet

operation. Motor windings contain automatic thermal
overload protection.

D. The high-capacity, non-clog, cast iron impeller, which is

threaded to a nickel plated steel shaft, efficiently handles
up to 1-1/2 inch spherical solids. Pump-out vanes on
back of impeller prevent stringy materials from binding
impeller or shaft.

E. Upper radial and lower thrust bearings are heavy-duty,

single-row ball bearings that are permanently lubricated
for service-free life.

F. Heavy-duty, cast iron construction provides long life and

assists in heat dissipation for cooler motor operation.
All-bronze model, SP50AB, is also available.

G. Precision, mechanical shaft seal is extensively-lapped,

carbon- and ceramic-faced for a long leakproof life.

H. Bottom inlet has no screen to become clogged, providing

optimum pump performance and minimal maintenance.

I. Discharge is a standard 2 inch NPT (3 inch is optional).

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SP50 - Submersible Sewage Ejector Pump

Details
Pump Characteristics Performance Data
Pump/Motor Unit Submersible 32

Manual Models M1 M7 M2 M6 M3 M4 M5
Automatic Models A1 - A2 - - - -

TOTAL DYNAMIC HEAD-FEET

24
Automatic All Brz. AB1 - - - - - -
Horsepower 1/2 1/2
HP
Full Load Amps 12.0 5.7 6.0 4.1 3.5 1.9 1.4
16
Motor Type Split-Phase Three-Phase
R.P.M. 1750
Phase Ø 1 3 8
Voltage 115 200 230 200 230 460 575
Hertz 60
Temperature 140ºF Ambient 0
0 32 64 96 128 160 192
NEMA Design A CAPACITY-U.S. G.P.M.

Insulation Class B
Discharge Size 2” NPT std. (3” opt.) Dimensional Data
Solids Handling 1-1/2”
4-3/8" 8-1/8"
Unit Weight 70 lbs. (SP50AB1 77 lbs.) (111) 5-7/8" (206)
(149)
Power Cord 16/3, STWA, 1ø 115V, 230V=10’
2" (50) NPT
std. (20’ optional) 16/4, STWA, 3ø 4-5/8" DISCHARGE
(117)
200V, 230V, 460V, or 575V = 20’ std.

4"
Materials of Construction (101)
7-5/16"
(185)
Handle Steel
Lubricating Oil Dielectric Oil
18" (457) MINIMUM SUMP DIA.
Motor Housing Cast Iron*
Pump Casing Cast Iron*
Shaft Nickel Plated Steel
Mechanical Seal Faces: Carbon/Ceramic
14-1/4"
Shaft Seal Seal Body: Brass (361)
PUMP
Spring: Stainless Steel ON
12-13/16"
Bellows: Buna-N 12-7/16"
DICHARGE (325)
HIGHT
(315)
Impeller Cast Iron
Upper Bearing Bronze Sleeve 5-3/4" 5-7/8"
(146) (149)
PUMP
Lower Bearing Single Row Ball Bearing OFF

Fastener Stainless Steel

All dimensions in inches. Metric for international use. Component dimensions may vary ± 1/8 inch.
Dimensional data not for construction purpose unless certified. Dimensions and weights are approximate.
On/Off level adjustable. We reserve the right to make revisions to our product and their specifications
without notice.

– Your Authorized Local Distributor –

USA CANADA
740 East 9th Street Ashland, Ohio 44805 269 Trillium Drive Kitchener, Ontario, Canada N2G 4W5
Tel: 419-289-3042 Fax: 419-281-4087 www.hydromatic.com Tel: 519-896-2163 Fax: 519-896-6337

© 2009 Hydromatic® Ashland, Ohio. All Rights Reserved. Item #: W-02-6260 07/09