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Submersible sump pump in cast iron finish with vertical float switch attached

Dayton

Dayton 3BB72 3/4 HP Submersible Sump Pump 120V AC Vertical Float

SKU CH-0Z18-C0K72 MPN 3BB72

Submersible sump pump with 3/4 HP motor and vertical float switch delivering up to 80 gpm at 5 ft head

  • Product typeDrain Components
  • 3/4 HP motor delivers up to 80 gpm flow at 5 ft head
  • Vertical float switch activates at 7 3/4 in and shuts off at 3 in
  • Cast iron body and impeller resist wear in dirty water
  • Carbon ceramic shaft seal reduces leak risk
  • 120V AC single-phase power suits standard household circuits

Pump Purpose

The Dayton 3BB72 is a 3/4 HP submersible sump pump designed for residential and light-commercial drainage. It operates on 120V AC power and uses a vertical float switch with piggyback electrical connection for automatic water-level control. The cast iron body and impeller provide durability in continuous submersion. Builders installing a primary basement sump system will find the specifications match standard pit dimensions.

Capacity And Headroom

Flow rates are rated at 80 gpm at 5 ft of head, 70 gpm at 10 ft, 62 gpm at 15 ft, and 50 gpm at 20 ft, with a maximum head of 32 ft. The pump draws 9.8 A at 60 Hz during operation. These figures suit typical groundwater removal where discharge elevation stays within the rated head range. Sites requiring flow beyond 80 gpm or lift above 32 ft will need a higher-capacity unit.

Switch Actuation

The vertical float switch turns the pump on at 7 3/4 in and off at 3 in of water depth. This fixed actuation range determines the minimum pit depth and the water volume cycled per run. Installations needing adjustable on/off levels or a tethered float design cannot use this pump without modification.

How it compares

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

Price $331.99
Pricier than about 90% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3BB72
Product typeDrain Components

Questions about this item

Will the 1-1/2 inch discharge on this 3/4 HP pump connect to my existing 1-1/2 inch PVC pipe?

Yes, the 1-1/2 inch female threaded discharge matches standard 1-1/2 inch PVC fittings so it threads directly onto your existing pipe.

How can I verify the vertical float switch is cycling at the correct 3 inch off and 7-3/4 inch on points?

Fill the basin with water and watch the float rise; the pump should start when the water reaches about 7-3/4 inches and shut off again once it drops to roughly 3 inches.

Does the box include the piggyback plug for the float switch or must I buy a separate control cord?

The piggyback plug is built into the float-switch cord, so the pump plugs into the plug and the plug goes into the outlet — no extra control cord is required.

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