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White polyethylene basin with pump and float switch visible inside

Zoeller

Zoeller 912-0121 18" x 30" Simplex Sewage Package System Trap 4/10HP 115V

SKU CH-0JM8-J457C MPN 912-0121

An 18 by 30 inch simplex sewage package system with a 4/10 HP pump delivering 82 gpm at 5 ft head and handling 2 inch solids

  • TypeDrain Components
  • Simplex design handles sewage with a single pump
  • 4/10 HP motor delivers 82 gpm at 5 ft head
  • Polyethylene basin holds 33 gallons for extended capacity
  • Vertical float switch automates pump operation reliably
  • 15 ft cord allows flexible installation positioning

Simplex Sewage Package System

The Zoeller 912-0121 is a simplex sewage ejector system designed for residential or light commercial waste removal. It includes a single pump rated at 4/10 HP operating on 115V power. The polyethylene basin measures 18 by 30 inches and holds 33 gallons. This unit suits installations requiring automatic sewage lifting.

Sustained load performance

The pump delivers a flow rate of 82 gallons per minute at 5 feet of head and 53 gallons per minute at 10 feet of head. At 15 feet of head the rate drops to 32 gallons per minute with a maximum head of 19 feet. It handles solids up to 2 inches in diameter and runs at 3,400 RPM with a continuous duty cycle. The maximum liquid temperature is 110 degrees Fahrenheit.

Installation and common issues

The system uses a vertical float switch with an integral electrical connection and a 15-foot power cord for simplified wiring. Basin and pump bodies are polyethylene for corrosion resistance. Installers must verify the 120V AC, 60 Hz supply matches the motor rating. The California Proposition 65 warning indicates chemical exposure risk during handling. Buyers needing higher flow rates or dual-pump redundancy should consider other configurations.

Highlights

  • Simplex design handles sewage with a single pump
  • 4/10 HP motor delivers 82 gpm at 5 ft head
  • Polyethylene basin holds 33 gallons for extended capacity
  • Vertical float switch automates pump operation reliably
  • 15 ft cord allows flexible installation positioning

Specifications

TypeDrain Components
BrandZoeller
Model912-0121

Questions about this item

How much power does the 4/10 HP motor draw when the basin runs continuously?

The pump operates on 115 V AC at 60 Hz with a continuous duty cycle, delivering 82 gpm at 5 ft head and 53 gpm at 10 ft head.

What inlet and discharge piping must already be on site for the 18" x 30" basin to connect?

The system handles solids up to 2 in diameter and includes a 15 ft power cord; piping to match the basin connections is required.

Will the vertical float switch interfere with an existing 19 ft max-head discharge line?

The integral vertical float actuates inside the 33 gal polyethylene basin and the pump reaches a maximum head of 19 ft.

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