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Grey cast iron submersible sump pump with vertical float switch

Dayton

Dayton 3BB71 1/2 HP Submersible Sump Pump 120V AC Vertical Float

SKU CH-0QGX-5WWH8 MPN 3BB71

Removes water from sump pits using a 1/2 HP motor with vertical float switch activating at 7 1/4 inches and delivering 65 gpm at 5 ft head

  • TypeDrain Components
  • Reliable automatic operation with vertical float switch activating at 7 1/4 in
  • Strong water removal delivering 65 gpm at 5 ft head
  • Durable cast iron construction resists corrosion for long service life
  • Handles demanding jobs with maximum 30 ft head capacity
  • Efficient 1/2 HP motor runs on standard 120V AC 60 Hz power

Submersible Sump Pump 1/2 HP

The Dayton 3BB71 is a 1/2 horsepower submersible sump pump rated for 120V AC at 60 Hz and 6.8 amps. It features a vertical float switch with piggyback electrical connection and a cast iron body and impeller for durability. The pump activates at 7 1/4 inches and shuts off at 3 inches.

Basement water removal duty

This pump suits homeowners needing automatic water removal from sump pits where a vertical float can operate freely. It is not for installations requiring a tethered float due to space constraints or for applications demanding flow rates above 65 gpm at 5 ft head.

Sustained pumping performance

At 5 ft head the pump delivers 65 gpm, declining to 57 gpm at 10 ft, 45 gpm at 15 ft and 30 gpm at 20 ft with a maximum head of 30 ft. The carbon ceramic shaft seal and cast iron construction support continuous operation under these load conditions.

Highlights

  • Reliable automatic operation with vertical float switch activating at 7 1/4 in
  • Strong water removal delivering 65 gpm at 5 ft head
  • Durable cast iron construction resists corrosion for long service life
  • Handles demanding jobs with maximum 30 ft head capacity
  • Efficient 1/2 HP motor runs on standard 120V AC 60 Hz power

Specifications

TypeDrain Components
BrandDayton
Model3BB71

Questions about this item

What pipe fitting do I need to connect the 1-1/2 inch discharge outlet?

The pump has a 1-1/2 inch female threaded discharge, so you must supply a matching male NPT pipe or adapter to complete the connection.

Will the vertical float switch clear the walls of my existing 10 inch sump basin?

The pump body is 9 1/8 inches in diameter and the vertical float travels along the side, so a basin with at least a 10 inch inside diameter provides enough clearance for reliable operation.

How can I confirm the pump is delivering its rated 65 gallons per minute at 5 feet of head after installation?

Time how long it takes to fill a known-volume container at the discharge pipe; 65 gpm equals roughly 15 seconds for a 5-gallon bucket, giving a quick field verification of performance.

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