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

Goulds Water Technology

Goulds Water Technology GSP0311 1/3 HP Submersible Sump Pump 115V

SKU CH-QKCD-GCWMW

A 1/3 HP submersible sump pump delivering 42.0 gpm at 5 ft head with a vertical float switch activating at 7 1/4 in

  • MaterialHAWA
  • Weight25.2
  • 1/3 HP motor delivers 42.0 gpm at 5 ft head
  • Vertical float switch activates at 7 1/4 in and shuts off at 3 1/2 in
  • Cast iron body with nylon impeller and silicon carbide shaft seal
  • 115 V 60 Hz single-phase power draws 10 A
  • Fits sump pits 12 in diameter with 1-1/2 in discharge

Goulds 1/3 HP Submersible Sump Pump

This Goulds Water Technology submersible sump pump delivers 1/3 horsepower at 115V AC for residential water removal. It suits homeowners needing automatic drainage in basements or crawl spaces with pits of at least 12 inches diameter. The integral vertical float switch activates at 7 1/4 inches and shuts off at 3 1/2 inches. Buyers needing higher flow rates or larger horsepower ratings should look elsewhere.

Sustained Drainage Performance

At 5 feet of head the pump moves 42.0 gpm, dropping to 35.0 gpm at 10 feet and 26.0 gpm at 15 feet of head. Flow reduces to 11.0 gpm at 20 feet of head with a maximum shut-off head of 22.0 feet. The cast iron body and silicone carbide shaft seal support continuous operation during heavy inflow events. The nylon impeller handles typical sump debris without clogging under normal conditions.

Installation Considerations

The unit weighs 25.2 pounds and requires a 1-1/2 inch discharge connection for plumbing. A 12 inch minimum pit diameter ensures the vertical float switch cycles correctly without binding against walls. The integral switch simplifies wiring to a standard 115V 60 Hz circuit drawing 10 amps. Installers must verify pit depth accommodates the 7 1/4 inch on-point and provide a dedicated circuit to prevent nuisance tripping.

Highlights

  • 1/3 HP motor delivers 42.0 gpm at 5 ft head
  • Vertical float switch activates at 7 1/4 in and shuts off at 3 1/2 in
  • Cast iron body with nylon impeller and silicon carbide shaft seal
  • 115 V 60 Hz single-phase power draws 10 A
  • Fits sump pits 12 in diameter with 1-1/2 in discharge

Specifications

MaterialHAWA
Weight25.2
BrandGOULDS WATER TECHNOLOGY

Questions about this item

How loud does the GSP0311 get when it runs continuously in a 12 in sump pit?

The pump draws 10 A at 115V AC, 60 Hz and delivers up to 42.0 gpm at 5 ft of head; normal motor hum is the only sound you will hear in a properly sized pit.

What electrical supply and discharge piping must I already have for this 1/3 HP unit?

You need a 115V AC, 60 Hz circuit rated for at least 10 A and a 1-1/2 in discharge line; the pump includes an integral vertical-float switch so no separate control box is required.

Will the cast-iron body and nylon impeller handle the same dirty water my old 1/4 HP pump moved?

Yes, the cast-iron body, nylon impeller and silicon-carbide shaft seal are built for typical sump debris, and the pump produces 35.0 gpm at 10 ft of head with a 22.0 ft maximum head.

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