45MFL5A1SUAA

A Proven Chemical Injection Pump Trusted for Decades

The Stenner Classic Series has been a trusted choice for chemical injection applications for more than six decades. Its popularity comes from a simple combination of reliability, flexibility, and ease of maintenance. Whether used for water treatment, well water disinfection, irrigation, livestock operations, or industrial chemical feed systems, the Classic Series is designed to provide dependable performance year after year.

One of the biggest advantages of the Classic Series is its versatility. Customers can choose between single-head and double-head models, as well as fixed or adjustable outputs. Adjustable models allow users to fine-tune feed rates using an external dial, while fixed-output models deliver consistent injection rates and can be paired with controllers or proportional injection systems.

The double-head models provide additional flexibility by either doubling output capacity or allowing two compatible solutions to be injected at the same ratio. This makes the Classic Series adaptable to a wide range of treatment requirements without changing pump platforms.

Maintenance is straightforward thanks to Stenner's patented QuickPro® pump head. Pump tube replacement can be completed without tools, helping reduce service time and minimize downtime. Many components are interchangeable across Classic models, making future upgrades or conversions easier and more cost-effective.

Key Benefits

, Available in fixed or adjustable output configurations

, Single-head and double-head models available

, Adjustable models feature a 20:1 turndown ratio

, Self-priming up to 25 feet

, Can pump off-gassing solutions and run dry

, Tool-free tube replacement

, Continuous-duty operation

, Output unaffected by back pressure

, Compatible with controllers and proportional injection systems

The Classic Series is also well suited for varying flow applications. Fixed-output models are commonly used in proportional injection systems, where water meter signals and controllers work together to deliver accurate chemical dosing based on system demand.

Performance Highlights

, Up to 100 PSI operating pressure

, Up to 170 GPD output on double-head models

, Continuous-duty motor design

, Maximum operating temperature of 125°F

, Indoor installation, with outdoor capability when used with a Stenner Rain Roof

For customers looking for a dependable, field-proven metering pump that can adapt to changing application requirements, the Stenner Classic Series remains one of the most versatile and widely used chemical injection pumps in the industry.