Dosatron 40 GPM, 7.5 to 75mL, Bypass Switch-VITON-Union

Dosatron D40MZ2 40 GPM Water-Powered Injector, Viton Seals – D40MZ2BPVFHY

The Dosatron D40MZ2BPVFHY is the higher-concentration variant of the 40 GPM D40MZ series. Where the D40MZ3000 series doses at 1:3000 to 1:500 (0.03% to 0.2%), the D40MZ2 operates in the 1:500 to 1:50 range (0.2% to 2%), delivering 7.5 to 75 mL of concentrate per gallon of water. This range is used for concentrates that require higher application rates — such as root treatments, pH adjusters applied at higher ratios, or concentrates that call for doses above 1-2 tsp per gallon.

Like other D40MZ models, the D40MZ2BPVFHY is water-powered, requires no electricity, and has a 1-1/2-inch NPT connection. Viton seals are standard and compatible with most hydroponic nutrients and pH adjusters. The bypass switch allows water flow without dosing. A factory-included union makes integration into Hi-Flo NDS plumbing straightforward and allows the injector to be removed for service without cutting lines.

Key Features & Benefits

• 1:500 to 1:50 Dilution Range — 0.2% to 2% — 7.5 to 75 mL of concentrate per gallon.
• 40 GPM High-Flow Capacity — Handles facility water supply flow rates from 2.2 to 40 GPM.
• Viton Seal Assembly — Broad chemical compatibility with standard nutrients and pH adjusters.
• Bypass Switch — Allows plain-water flow without injecting concentrate.
• Union Included — Factory-included union for clean integration and easy removal from NDS plumbing.
• 1-1/2-Inch NPT Connections — Connection size for high-flow NDS Hi-Flo systems and large-facility plumbing.

Who Should Use This Injector

The D40MZ2BPVFHY is for high-flow facilities using concentrates that require application rates in the 1:500 to 1:50 range. Select the D40MZ2 series over the D40MZ3000 series when the concentrate label specifies dosing rates above approximately 2 mL per liter (or 7.5 mL per gallon). The two models are not interchangeable — each is calibrated for its specific dilution range.

Understanding Dosatron Dilution Range Selection

Dosatron injectors come in multiple dilution range configurations because concentrate application rates vary widely by product. Nutrient solutions are often used at 1:100 to 1:500, while pH adjusters like phosphoric acid may be used at 1:500 to 1:3000. A single Dosatron model cannot accurately dose across the full spectrum — each model is optimized for a specific range. The D40MZ3000 series (1:3000 to 1:500) is used for nutrients and supplements dosed at lower concentrations. The D40MZ2 series (1:500 to 1:50) is for products used at higher concentrations. Always match the injector's dilution range to the concentrate's recommended application rate.

Frequently Asked Questions

What is the dilution range of the D40MZ2BPVFHY?

1:500 to 1:50, which equals 0.2% to 2%, or 7.5 to 75 mL per gallon. That's a higher-concentration range than the D40MZ3000 series covers.

When should I choose the D40MZ2 over the D40MZ3000?

Choose the D40MZ2 when the concentrate is applied at rates between 7.5 and 75 mL per gallon (1:500 to 1:50). Choose the D40MZ3000 for lower-concentration products dosed at 1.25 to 7.5 mL per gallon.

What connection size does it use?

1-1/2-inch NPT. This matches Hi-Flo NDS plumbing and other 40 GPM D40 series injectors.

Does it need electricity?

No, the D40MZ2BPVFHY is entirely water-powered. It operates purely from incoming water line pressure.

What is included?

6-foot clear suction tube, weighted strainer, mounting bracket, operating manual, bypass switch, and union. That's the full hardware set for a standard installation.