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Cast iron submersible sump pump with 1-1/2 inch discharge outlet

Zoeller

Zoeller 371-0004 3/10 HP Submersible Sump Pump 230V Manual

SKU CH-6HM3-V745H

Submersible sump pump delivers 34 gpm at 10 ft head with 3/10 HP motor and cast iron body for manual 230 V operation

  • 3/10 HP motor delivers 34 gpm at 10 ft head
  • Cast iron body resists corrosion for long service life
  • Silicon carbide shaft seal reduces wear in abrasive water
  • 230 V, 60 Hz single-phase power suits residential wiring
  • Manual operation gives full control over pump cycles

Zoeller 371-0004 Submersible Sump Pump

The Zoeller 371-0004 is a 3/10 HP submersible sump pump designed for residential and light commercial water removal. It operates on a 230V AC, 60 Hz power supply drawing 9.7 amps. The unit features a cast iron body with a thermoplastic impeller and a silicone carbide shaft seal for durability. This manual model requires a separate switch for automatic operation.

Thermals noise and power draw

The pump draws 9.7 amps at 230V AC during normal operation. Submersible installation in the sump pit naturally dampens motor and water noise. The cast iron construction acts as a heat sink, transferring motor heat directly into the surrounding water for continuous cooling. No external ventilation or additional cooling measures are required for standard use.

Flow rates at specific head heights

At 10 ft of head the pump delivers 34 gpm, at 15 ft it delivers 19 gpm, and at 20 ft it delivers 13 gpm with a maximum shut-off head of 19 ft. Buyers needing higher flow rates at greater lift heights or a pump with an integrated float switch for automatic cycling should consider other models. The 1-1/2 inch discharge and 18 inch minimum pit diameter define the installation requirements.

Highlights

  • 3/10 HP motor delivers 34 gpm at 10 ft head
  • Cast iron body resists corrosion for long service life
  • Silicon carbide shaft seal reduces wear in abrasive water
  • 230 V, 60 Hz single-phase power suits residential wiring
  • Manual operation gives full control over pump cycles

Specifications

BrandZOELLER

Questions about this item

How is the 230 V Zoeller 371-0004 wired and what step is often missed?

Connect the pump to a dedicated 230 V, 60 Hz circuit rated for at least 9.7 A and install a separate float or pressure switch, since no switch is included; the step often missed is adding that external switch before first use.

What part will need replacement first during the life of this pump?

The silicone-carbide shaft seal is the primary wear component; plan to inspect and replace it when leakage appears around the motor housing.

At what head does flow drop off sharply on this 3/10 HP unit?

Maximum head is 19 ft; at 15 ft head flow is 19 gpm and at 20 ft head it falls to 13 gpm, so sustained operation near 19 ft is the practical limit.

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