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Cylindrical cast iron submersible sump pump with vertical float switch and 1-1/2 inch discharge outlet

Goulds Water Technology

Goulds Water Technology GSP0311-25 1/3 HP 1-1/2" F Submersible Sump Pump 115V equipment

SKU CH-3GCQ-5DZ4F

Submersible sump pump with a 1/3 HP motor, 115 V power and 42.0 gpm flow rate up to 22.0 ft head

  • MaterialHAWA
  • Weight25.2
  • Reliable water removal with 1/3 HP motor
  • Automatic operation via vertical float switch at 7 1/4 in on point
  • Consistent 42.0 gpm flow from 5 to 20 ft head
  • Durable cast iron body with nylon impeller and silicone carbide seal
  • 115V 60 Hz single-phase power draws 10 A

1/3 HP Submersible Sump Pump

The Goulds Water Technology GSP0311-25 is a submersible sump pump rated at 1/3 horsepower for 115V AC, 60 Hz operation. It uses a vertical float switch with an integral electrical connection to automate water removal. The pump body is cast iron with a nylon impeller and a silicon carbide shaft seal. It is designed for residential or light commercial sump pits.

Flow Rate and Head Capacity

The pump delivers a consistent 42.0 gpm flow rate at 5, 10, 15 and 20 feet of head. Maximum shut-off head reaches 22.0 feet, beyond which the pump cannot move water. Performance remains steady across the lower head range, but drops to zero at the maximum limit. Buyers needing flow above 22 feet of head or higher volume at lower head should consider other options.

1-1/2 Inch Discharge and Pit Requirements

The discharge outlet is 1-1/2 inches female, limiting hose or pipe connections to that size. A minimum sump pit diameter of 12 inches is required for the vertical float switch to operate without obstruction. The unit weighs 25.2 pounds and draws 10 amps at 115V. Installations with smaller pits, larger discharge needs or different voltage requirements are not supported.

Highlights

  • Reliable water removal with 1/3 HP motor
  • Automatic operation via vertical float switch at 7 1/4 in on point
  • Consistent 42.0 gpm flow from 5 to 20 ft head
  • Durable cast iron body with nylon impeller and silicone carbide seal
  • 115V 60 Hz single-phase power draws 10 A

Specifications

MaterialHAWA
Weight25.2
BrandGOULDS WATER TECHNOLOGY

Questions about this item

Will the 1-1/2 inch discharge on this Goulds GSP0311-25 connect to my existing 1-1/2 inch PVC piping?

Yes, the 1-1/2 inch female outlet matches standard 1-1/2 inch PVC pipe; use a male adapter and solvent cement for a watertight joint.

How can I confirm the vertical float switch is cycling correctly after installation?

Fill the pit until water reaches the 7-1/4 inch on point — the pump should start — then watch it shut off automatically when the level drops to the 3-1/2 inch off point.

Does the box include a check valve or discharge hose, or must I buy them separately?

The pump ships with the integral vertical float switch and cast iron body only; a 1-1/2 inch check valve and discharge piping are not included and must be purchased separately.

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