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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

  • Product 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.

How it compares

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

Price $272.99
Pricier than about 88% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3BB71
Product typeDrain Components

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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