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Sterlco 4128-GD Duplex 12 GPM Condensate Return Pump with 15 Gallon Steel Tank 20 PSI

$ 1,715.00

Sterlco 4128-GD Duplex 12 GPM Condensate Return Pump with 15 Gallon Steel Tank offers (2) two bronze fitted 15 gallon per minute centrifugal pumps with 20 psi discharge pressure and 1/3 HP 1/60/115-208/230 or 3/60/208-230/460 volt electric motor, float switch, and automatic venting. Made in USA. Mechanical actuators are recommended for duplex pumps. Duplex Control panels are sold and ordered separately but are assembled as a unit at factory.

To view and order “optional control panel” for condensate pump sold separately, Click Duplex Control panels

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Sterlco 4128-GD Duplex 12 GPM Condensate Return Pump with 15 Gallon Steel Tank 20 PSI. This Sterlco Condensate Return Pumps set new standards of performance. Reliable and efficient, each unit features heavy gauge, 3/16″ steel receivers for long operating life. In addition, 3450 RPM motors assure maximum efficiency while maintaining minimum motor horsepower. Available in a wide range of sizes, these U.S. made pumps have just the right accessories and options to meet your unique needs. What’s more, a nationwide network of stocking distributors means fast, easy, year round access to pumps and replacement parts.

Specifications Brochure

Sterlco 4128-GD Features:

  • (2x) 1/3 HP Motors (specify voltage at time of order)
  • Heavy gauge steel receivers
  • Simplex or duplex construction
  • Bronze fitted centrifugal pumps
  • Energy efficient 3450 RPM motors
  • Automatic venting
  • “Sterl-Seal” ceramic pump seal
  • Heavy-duty float switch
  • Wide range of options and accessories

Built-In Features For Precise, Dependable Performance

  1. Motors: Heavy-duty, ball bearing, close-coupled pump motors with stainless steel shaft. 3450 RPM for greater efficiency and more economical operation.
  2. Float Switch: Two-pole, drip proof case, stainless steel float and float rod, double-break silver-to-silver contacts. Float travel adjustment is easy, visible and accessible.
  3. Automatic Venting: Provides for efficient operation and long life by venting air and flushing seal area.
  4. Large Tanks: Plenty of capacity for maximum rating of pump. Return inlet is low. Occupies a minimum of floor space.
  5. Centrifugal Pump: Offers a wide range of pressures and GPM. Unique design features provide for ease of servicing.
  6. Impeller: Made of brass for long life. Efficient design provides maximum capacity, minimum motor load.
  7. “SterlSeal” Pump Seal (A): Features the ultimate in ceramic technology for exceptionally long life. Because the seal runs on the bronze impeller hub, the motor shaft is literally outside the pump. Consequently, the shaft is not exposed to corrosion by condensate. Rated for temperatures up to 250ºF.
  8. Isolation Valve (B): Optional on 4100 Series Condensate Pumps

Additional information

Weight 185 lbs
Dimensions 23.25 × 17 × 14.38 in
Manufacturer Part Number


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