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

Zoeller

Zoeller N371 3/10 HP 115V Submersible Sump Pump

SKU CH-0DBV-7J0Z5 MPN N371

Submersible 3/10 HP cast-iron sump pump moves 43.0 gpm at 5 ft head with a 115 V motor

  • TypeDrain Components
  • Moves 43.0 gpm at 5 ft head for rapid water removal
  • Delivers 34.0 gpm at 10 ft head for consistent drainage
  • Handles 19.0 ft max head to clear deeper pits
  • Cast iron body resists corrosion for long service life
  • 115V AC, 9.7 A motor runs on standard household power

Purpose and fit

The Zoeller N371 is a 3/10 HP submersible sump pump designed for residential drainage where a 115 V supply is available. It suits homeowners who need automatic water removal from a pit that meets the minimum 18 in diameter requirement. The cast iron body and silicone carbide shaft seal are built for continuous immersion in dirty water. Buyers who want more flow at higher head or a built-in float switch should look elsewhere.

Upgrade considerations

This pump replaces older units that delivered less than 43.0 gpm at 5 ft of head or 34.0 gpm at 10 ft of head. The jump is worth it when the existing pit is at least 18 in wide and the discharge plumbing can handle the 1-1/2 in female outlet. If the current installation has a max head requirement above 19.0 ft or a smaller pit diameter, the N371 will not meet the demand. No switch is included, so an external control must be sourced separately.

Installation notes

The unit measures 10 3/32 in body diameter and 10 1/16 in overall height, so verify pit clearance before lowering it in. Connect the 1-1/2 in female discharge to rigid or flexible pipe rated for 9.7 A at 115 V AC. Common issues include forgetting to install a check valve, which lets water fall back and cycles the motor, and wiring the pump without a dedicated GFCI circuit. The plastic impeller with metal insert resists debris but can jam if large solids enter the pit.

Highlights

  • Moves 43.0 gpm at 5 ft head for rapid water removal
  • Delivers 34.0 gpm at 10 ft head for consistent drainage
  • Handles 19.0 ft max head to clear deeper pits
  • Cast iron body resists corrosion for long service life
  • 115V AC, 9.7 A motor runs on standard household power

Specifications

TypeDrain Components
BrandZoeller
ModelN371

Questions about this item

What diameter sump pit does the Zoeller N371 require to operate?

The pump needs a minimum sump pit diameter of 18 inches for proper installation and operation.

How is the Zoeller N371 wired since no switch is included with the unit?

You must wire the pump motor directly to a separate 115-volt control switch or piggyback plug rated for 9.7 amps.

Which wear part on the Zoeller N371 will need replacement after extended use?

The silicone carbide shaft seal is the primary wear component that will require replacement to maintain the pump's watertight integrity.

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