Dosatron Water Powered Doser D25RE09, 11 GPM
Every gallon that moves through this doser pulls its share of concentrate, with no pump motor or wiring involved. Incoming water drives a piston inside the polyacetal housing. Each stroke draws a measured amount of concentrate up the suction tube and mixes it with the passing water. Because the water itself powers the unit, the dose stays proportional even when flow or pressure changes. The adjustable sleeve sets injection from 4 to 34 mL per gallon. That works out to 1 to 6.5 teaspoons per gallon, or a ratio between 1:1000 and 1:112. Water flow can run anywhere from 0.05 to 11 gallons per minute. Operating pressure runs from 4.3 to 85 psi. Connections are 3/4 inch NPT, matching the Lo-Flo layout of the Nutrient Delivery System. The VF in the part number marks Viton seals, and the BP marks the included bypass. A bypass lets clear water flow past the doser without injecting. The unit stands 14 inches tall, weighs 4 pounds and is made in France.
Running a Dosatron NDS Doser Day to Day
Each doser in the system handles one concentrate, so growers add units as the feed program grows. Mount it on the bracket with the arrow pointing in the direction of water flow. Feed it from the clear suction tube, with the strainer and weight resting near the bottom of the container. Dosatron requires a 60 micron water filter ahead of the doser to protect the piston and keep the warranty valid. A check valve, pressure regulator and flow restrictor are also recommended. Open the water supply gradually on first start. Count the piston clicks over 15 seconds to read the flow. Stay under 46 clicks in that window, which equals about 11 GPM. Set the dose on the tsp per gallon scale and lock the adjustment nut. Keep water temperature at or below 104°F. Rinse the doser with clean water after injecting any product prone to settling. Replace seals with the PJ127 injection seal kit at regular service intervals. Follow local rules for backflow prevention when connecting to a public water supply.
Key Features
- Water Powered: Line pressure drives the piston, so no electricity is needed.
- 4 to 34 mL per Gallon: Adjustable from 1:1000 to 1:112, or 1 to 6.5 tsp per gallon.
- 0.05 to 11 GPM: Proportional dosing across the full flow range at 4.3 to 85 psi.
- Bypass and Viton Seals: Built-in bypass for clear-water runs and Viton seals.
- 3/4 in NPT: Fits the Lo-Flo Nutrient Delivery System layout.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Dosatron |
| Model | D25RE09VFBPHY |
| Ratio Range | 1:1000 to 1:112 (0.1 to 0.9%) |
| Injection Range | 4 to 34 mL per gallon (1 to 6.5 tsp per gallon, 0.128 to 1.28 oz per gallon) |
| Water Flow Range | 0.05 to 11 GPM (0.19 to 42 LPM) |
| Operating Pressure | 4.3 to 85 psi |
| Maximum Water Temperature | 104°F |
| Connection Size | 3/4 in NPT |
| Housing Material | Polyacetal |
| Seals | Viton |
| Dimensions | 14 x 6 1/4 in |
| Weight | 4 lb |
| Included Accessories | 6 ft clear suction tube, strainer, weight, mounting bracket, bypass, union, tsp/gal scale, operating manual |
| Recommended Accessories | 60 micron water filter, check valve, pressure regulator, flow restrictor |
| Seal Kit | PJ127 |
| Origin | Made in France |