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Double Head Adjustable Output Metering Pump – Classic Series

Double Head Adjustable Output Metering Pump - Classic Series From Stenner

The Double Head Adjustable Output Metering Pump is another variation to select from in the Classic Series, electro-mechanical pump line.

Similar to the other models in the Classic series, the pump will dose solutions such as sodium hypochlorite, acid, polyphosphates, biocides for common water treatment applications that include disinfection, pH control, corrosion and scale control, oxidation and sanitization. This pump series provides twice the output for large Commercial Pool and Aquatic Facilities or Water and Wastewater treatment plants. The pump can also inject two compatible solutions at the same ratio. The Classic Series double head adjustable pump is built the same way as the single head adjustable with the addition of another pump head that doubles the output.

How the Double Head Adjustable Chemical Injection Pump Works

The output is determined by three factors; the rpm of the motor gears, the setting on the feed rate control and the pump tubes in both heads. The feed rate control has an external dial ring that is labeled L to 10 offering an adjustable output of 5% to 100% in 2.5% increments.

Unique Stenner Features

  • Interchangeable pump heads and tubes to convert one model to another; not necessary to purchase a new pump.
  • Easy and fast tube replacement without tools with the QuickPro® pump head.
  • The pump is built with four detachable components; the motor, feed rate control and two pump heads, that can be separated without tools.


The 100 and 170 models are two sub-series within the Classic Series Double Head Pumps (Adjustable and Fixed) and below is a summary of the primary differences in the Adjustable.

100 Series�Adjustable 175 Series Adjustable
  • 26 rpm
  • 0.3 to 20.0 gpd up to 100 psi
    (1.1 to 75.7 lpd up to 6.9 bar)
  • 0.3 to 100.0 gpd up to 25 psi
    (1.1 to 378.5 lpd up to 1.7 bar)
  • 44 rpm
  • 0.5 to 34.0 gpd up to 100 psi
    (1.9 to 128.7 lpd up to 6.9 bar)
  • 0.5 to 170.0 gpd up to 25 psi
    (1.9 to 643.5 lpd up to 1.7 bar)


Maximum Operating Temperature 125�F (52�C)
Maximum Suction Lift 25 ft (7.6 m) vertical lift, based on water
Motor Type 1/30 HP, shaded pole, class B
Duty Cycle Continuous
Motor Voltage (Amp Draw) 120V 60Hz 1PH (1.7)
220V 60Hz 1PH (0.9)
Power Cord Type SJTOW
Power Cord Plug End 120V 60Hz NEMA 5/15
220V 60Hz NEMA 6/15
230V 50Hz CEE 7/VII
250V 50Hz CEE 7/VII


Materials of Construction
All Housings Polycarbonate
Pump Tube & Check Valve Duckbill Santoprene®*, optional Versilon™** #1, #2 & #5 tubes,
FDA approved
CV Duckbill with Versilon™** Tube Pellathane®
Pump Head Rollers HDPE
Roller Bushings Oil impregnated sintered bronze
Suction/Discharge Tubing,
Ferrules 1/4″ & 6 mm
Polyethylene, FDA approved
Tube Fittings, Check Valve Fittings Gray fittings: Type 1 Rigid PVC, NSF listed
Black fittings: PP, NSF listed
Connecting Nuts PP or Type 1 Rigid PVC
3/8″ Adapter Type 1 Rigid PVC, NSF listed
Suction Line Strainer PP or Type 1 Rigid PVC body with Type 1 Rigid PVC cap,
NSF listed; ceramic weight
All Fasteners Stainless steel
Pump Head Latches Polypropylene


Listings vary by model.

* Santoprene® is a registered trademark of Exxon Mobil Corporation.
** Versilon™ is a registered trademark of Saint-Gobain Performance Plastics.
† Pellathane® is a registered trademark of The Dow Company.

Pump Dimensions

Shipping Weight: 10 lbs (4.5 kg)

Box Dimensions: 18 x 8 x 10 in. (45 x 20 x 25 cm)