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Grey cast-iron submersible pump with 2-inch outlet and sealed motor housing

Dayton

Dayton 4HU87 1-1/2 HP 2 in Submersible Sewage Pump 460V

SKU CH-42V2-NZR4R MPN 4HU87

Moves sewage at 145 gpm against 20 ft of head with a 1-1/2 HP, 460 V three-phase motor and 2 in solids handling

  • TypeDrain Components
  • 1-1/2 HP motor delivers strong sewage ejection power
  • 460 V three-phase supply suits industrial installations
  • 145 gpm at 20 ft head moves high volumes efficiently
  • 2 in maximum solids passage handles typical waste without clogging
  • Hermetically sealed oil-filled motor protects windings from moisture

Sewage pump for 460 V three-phase systems

The Dayton 4HU87 is a 1-1/2 HP submersible sewage pump built for 460 V three-phase power. Its cast-iron body and impeller with a carbon-ceramic shaft seal handle solids up to 2 in. diameter. The hermetically sealed, oil-filled motor runs without an integrated switch, so external controls are required for automatic operation.

Replaces smaller ejector pumps when head

The pump delivers 145 gpm at 20 ft of head, 95 gpm at 40 ft and 36 gpm at 60 ft. The jump is worth it when an existing 1 HP or lower unit cannot maintain required flow at the system’s working head. It is not suited for installations limited to single-phase supply or for applications needing an integrated float switch.

Verify voltage, phase and piping before ordering

Confirm the site provides 460 V three-phase power and that the control panel matches the 4.90 A draw. Ensure the discharge piping accommodates 2 in. solids passage and that the basin depth meets the pump’s mounting requirements. The unit includes no switch or level controls, so separate actuation and wiring must be planned.

Highlights

  • 1-1/2 HP motor delivers strong sewage ejection power
  • 460 V three-phase supply suits industrial installations
  • 145 gpm at 20 ft head moves high volumes efficiently
  • 2 in maximum solids passage handles typical waste without clogging
  • Hermetically sealed oil-filled motor protects windings from moisture

Specifications

TypeDrain Components
BrandDayton
Model4HU87

Questions about this item

What discharge size and solid-handling capacity does the 4HU87 need for piping?

The pump has a 2 inch discharge and passes solids up to 2 inches in diameter, so piping and fittings must accommodate at least a 2 inch opening.

How is the 460 V three-phase motor wired, and what common step is missed?

Connect the three power leads to a 460 V three-phase supply with correct rotation; the step often missed is verifying motor rotation before lowering the pump into the basin.

Which wear parts on the 4HU87 will need replacement over time?

The carbon-ceramic shaft seal and the cast-iron impeller are the primary wear items; the seal typically requires periodic replacement, and the impeller may need replacement if abrasion reduces performance.

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