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Dayton 12F738 sink pump system with 6 gallon HDPE basin and cast iron pump body

Dayton

Dayton 12F738 Sink Pump System 1/3 HP 115V 6 gal basin

SKU CH-91JP-XXXEX MPN 12F738

A cast-iron sink pump system with a 1/3 HP motor, 115 V operation and a 6 gal HDPE basin that delivers 36 gpm at 5 ft head

  • TypeDrain Components
  • 1/3 HP motor drives strong drainage performance
  • 115V AC operation suits standard household circuits
  • Cast iron pump body with stainless steel impeller resists wear
  • 6-gallon HDPE basin handles high-volume discharge
  • Vertical float switch provides automatic level control

Sink Pump System 1/3 HP 115V

The Dayton 12F738 is a complete sink drain pump system built for residential or light commercial drainage where gravity flow is not possible. It includes a 1/3 HP cast iron pump, a vertical float switch with piggyback connection, and a 6 gallon HDPE basin. The unit handles grey water from sinks, laundry trays or dehumidifiers.

Installation notes and common issues

The basin accepts 1 1/2 inch inlet, outlet and vent connections, allowing straightforward PVC or ABS plumbing. The piggyback float plugs into a standard 115V outlet and the pump cord plugs into the float, so no hard wiring is required. A frequent mistake is omitting a check valve on the discharge line, which causes short cycling and premature float wear.

Flow rates at measured head

At 5 ft of head the pump delivers 36 gpm, at 10 ft it delivers 30 gpm, at 15 ft it delivers 25 gpm, and at 20 ft it delivers 12 gpm. These four points define whether the system can overcome your vertical lift and friction losses. If the total dynamic head exceeds 20 ft the flow drops sharply and the pump may not keep up with demand.

Highlights

  • 1/3 HP motor drives strong drainage performance
  • 115V AC operation suits standard household circuits
  • Cast iron pump body with stainless steel impeller resists wear
  • 6-gallon HDPE basin handles high-volume discharge
  • Vertical float switch provides automatic level control

Specifications

TypeDrain Components
BrandDayton
Model12F738

Questions about this item

How do I know the 1/3 HP pump is running correctly after installation?

The vertical float switch should activate the pump when water rises in the 6 gal basin and shut it off once the level drops, delivering up to 36 gpm at 5 ft of head and 12 gpm at 20 ft of head.

What comes with the system and what must I purchase separately?

The unit includes the cast iron pump with stainless steel impeller, the 6 gal HDPE basin with 1 1/2 in inlet, outlet and vent, and the piggyback float switch; you will need to supply 1 1/2 in discharge piping, a check valve and a 115V GFCI outlet.

When should I choose this 6 gal basin version over a different capacity?

Select this 6 gal basin when the installation space fits a 13 3/8 in height and the expected flow matches the rated 36 gpm at 5 ft head for typical sink drainage applications.

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