The D40WL3000NAF is specifically designed for well water chlorination and water treatment applications where precise, reliable chemical injection is essential. Powered entirely by water flow, it delivers accurate dosing ratios from 1:3000 to 1:800 (0.03% to 0.125%), automatically adjusting chlorine injection in proportion to changing water demand. This ensures consistent treatment levels for applications such as water potabilization, disinfection, sanitation, and well water conditioning. Certified to NSF/ANSI/CAN 61 & 372 standards, the unit provides confidence for drinking water applications while eliminating the need for electricity. With a flow capacity of 2.2 to 40 GPM, the D40WL3000NAF offers an effective solution for controlling bacteria, odors, iron, manganese, and other common well water challenges while helping reduce chemical waste and operating costs.
- Connection Size: 1 1/2" NPT
- Percentage Range: 0.03 to 0.125%
- Unit Weight: 12 lbs
- Flow: 2.2 to 40 GPM (8.32 to 151 LPM)
- Pressure: 2.2 to 116 PSI
- Dimensions: 26 3/8" x 8 1/2"
- Ratio Range: 1:3000 to 1:800
Included Accessories: 6' clear suction hose, weighted strainer, mounting bracket and quick start guide.
Key Specifications
Weight
12
Water Flow Range
2.2 - 40
Operating Pressure Range
2.2 - 116
Maximum Temperature
104
Pressure loss

For the best treatment results, the D40WL3000NAF should be installed on a dedicated water treatment line or bypass assembly where flow conditions remain within the unit's operating range. Proper filtration is recommended to protect the injector and downstream equipment, while isolation valves can simplify maintenance and system servicing. Because the unit is commonly used in potable water applications, appropriate backflow prevention should be incorporated to help protect the water supply and maintain regulatory compliance. Positioning the chlorine solution tank close to the injector and minimizing suction lift helps ensure stable chemical pickup and accurate dosing. A properly designed installation promotes consistent disinfection performance, improves water quality, and supports long-term reliability in residential, agricultural, commercial, and light industrial water treatment systems.
Every application is different. Flow rates, water quality, chemical compatibility, and installation requirements all impact the best injector configuration.
Contact a Dosatron expert today to determine the ideal setup for your application.
Find your maintenance kit in seconds — just check how long your pump has been in service.
Time in service | Recommended kit | Why | Buy Now |
|---|---|---|---|
Under 6 months | Mini Maintenance Kit | Quick refresh of the wear parts that go first — keeps dosing accuracy on spec. | Click here |
6 months – 2 years | Seal Kit | Replaces the seals and O-rings before leaks and dosing drift start. | Click here |
Over 2 years | Rebuild Kit | A full internal overhaul — restores your pump to factory performance. | Click here |
Over 5 years | Talk to our team | At this stage the motor piston typically needs replacing. We'll confirm the right solution for your unit. |
Need a single replacement part instead of a full kit?
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