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

Dayton

Dayton 3BB73 1/3 HP Submersible Sump Pump 120V AC 1-1/2" FNPT

SKU CH-NKRF-AQ0AJ MPN 3BB73

A 1/3 HP submersible sump pump delivering 65 gpm at 5 ft head with a 30 ft maximum head and 1-1/2" FNPT discharge

  • Product typeDrain Components
  • Moves 65 gallons per minute at 5 ft head
  • Delivers 57 gpm at 10 ft head for steady drainage
  • Cast iron body and impeller resist corrosion
  • Carbon ceramic shaft seal extends service life
  • 1-1/2 in FNPT discharge fits standard pipe

1/3 HP Submersible Sump Pump

The Dayton 3BB73 is a 120V AC submersible sump pump rated at 1/3 horsepower. It is designed for residential or light commercial drainage where automatic water removal is required. The unit operates on a standard 60 Hz supply drawing 6.8 amps. No float switch is included with this model.

Cast Iron Body with 1-1/2" FNPT Discharge

The pump body and impeller are both constructed from cast iron for durability in submerged conditions. A carbon ceramic shaft seal helps protect the motor from water intrusion. The 1-1/2 inch FNPT discharge outlet allows direct connection to standard piping. Overall height is 11 3/4 inches with a body diameter of 8 1/2 inches.

Upgrading from Lower Capacity Pumps

This model delivers 65 gpm at 5 feet of head and 30 gpm at the maximum 30 foot head. It suits installations needing higher flow at moderate lift than smaller fractional horsepower units provide. Buyers who need an integrated automatic switch or higher head pressure should consider other configurations.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $247.99
Pricier than about 87% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3BB73
Product typeDrain Components

Questions about this item

What flow rate does the 1/3 HP motor deliver at 10 feet of head?

The pump moves 57 gallons per minute at 10 feet of head, 65 gpm at 5 feet, 45 gpm at 15 feet and 30 gpm at 20 feet, with a maximum shut-off head of 30 feet.

What discharge piping does the 1-1/2 inch FNPT outlet accept?

The cast iron body has a 1-1/2 inch female NPT thread that connects directly to standard 1-1/2 inch male pipe fittings or a matching adapter for other pipe sizes.

How is the pump wired when no switch is included?

The 120 V AC, 60 Hz, 6.8 amp motor leads are connected to a separate piggy-back float switch or control panel; the float cord plugs into the outlet and the pump plugs into the float, so the switch cycles power to the pump.

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