The D40MZ3000 is designed for applications that require highly accurate, low-dose chemical injection at higher flow rates. Utilizing Dosatron's water-powered proportional dosing technology, it injects concentrates at ratios from 1:3000 to 1:500 (0.03% to 0.2%), automatically adjusting the injection rate as water flow changes. This ensures a consistent chemical concentration throughout the process, making the unit ideal for water treatment, agriculture, industrial processes, cleaning systems, and other applications where precision is critical. With a flow capacity of 2.2 to 40 GPM, the D40MZ3000 combines exceptional dosing accuracy with the ability to handle larger volumes, helping reduce chemical consumption while maintaining reliable treatment performance.
- Connection Size: 1 1/2" NPT
- Percentage Range: 0.03% to 0.2%
- Unit Weight: 12 lbs
- Flow: 2.2 to 40 GPM (8.32 to 151 LPM)
- Pressure: 4.3 to 116 PSI
- Dimensions: 25 1/4” x 8 1/2”
- Ratio Range: 1:3000 to 1:500
- Included Accessories:Mounting bracket, suction hose, weighted strainer, and quick start guide.
Pressure loss

For maximum efficiency and long-term reliability, the D40MZ3000 should be installed on a dedicated dosing line with adequate upstream filtration to protect the injector from debris and contaminants. Isolation valves are recommended to simplify maintenance and allow the unit to be serviced without shutting down the entire system. Because the injector is designed for precise low-volume dosing, keeping the concentrate source close to the unit and minimizing suction lift helps ensure stable chemical pickup and consistent injection accuracy. Proper backflow prevention should also be incorporated where required to protect the water supply and chemical inventory. A well-planned installation helps optimize dosing performance, extend equipment life, and deliver dependable results across a wide range of applications.
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?
D40MZ SERIES SPOTLIGHT
Tom Talk – Dosatron Injector Mastery: Unleashing Precision with D40MZ Series
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