The Dosatron Nutrient Delivery System 40 GPM Unit is perfect for the indoor grower. It's water-powered so no electricity is needed and it includes a union for easy installation into the Nutrient Delivery System (NDS).Included Accessories: Mounting bracket, suction hose, bypass, union, weighted strainer, and quick start guide. 1.25 to 4.85 mL (0.25 to 0.9 tsp) | 0.03 to 0.125% Connection Size: 1 1/2" NPT Unit Weight: 12 lbs Dimensions: 26 3/8" x 8 1/2" Flow: 2.2 to 40 GPM (8.32 to 151 LPM) Pressure: 2.2 to 116 PSI Ratio: 1:3000 to 1:800 Percentage (%): 0.03 to 0.125% Oz/gal: 0.043 to 0.160 Item #: D8RE3000VFBPIIK D8RE3000 Specification Sheet (PDF)D8RE3000 Schematics (PDF)7.5 to 75 mL (1.5 to 15 tsp) | 0.2 to 2% Special: Doser for the Nutrient Delivery System Connection Size: 1 1/2" NPT Unit Weight: 12 lbs Dimensions: 25 1/4" x 8 1/2" Flow: 2.2 to 40 GPM (8.32 to 151 LPM) Pressure: 2.2 to 116 PSI Ratio: 1:500 to 1:50 mL/gal: 7.5 to 75 mL Tsp/gal: 1.5 to 15 tsp Percentage (%): 0.2 to 2% Oz/gal: 0.256 to 2.560 Item #: D8RE2VFBPHY D8RE2VFBPHY Specification Sheet (PDF)D8RE2 Schematics (PDF)37.5 to 190 mL (7.5 to 38 tsp) | 1 to 5% Special: Doser for the Nutrient Delivery System Connection Size: 1 1/2" NPT Unit Weight: 12 lbs Dimensions: 25 15/16" x 8 1/2" Flow: 2.2 to 40 GPM (8.32 to 151 LPM) Pressure: 2.2 to 116 PSI Ratio: 1:100 to 1:20 mL/gal: 37.5 to 190 mL Tsp/gal: 7.5 to 38 tsp Percentage (%): 1 to 5% Oz/gal: 1.280 to 6.400 Item #: D8RE5VFBPHY D8RE5VFBPHY Specification Sheet (PDF)D8RE5 Schematics (PDF)Additional InformationD8RE Series Operating Manual (PDF)D8RE Series Quick Start Guide (PDF)Nutrient Delivery System HI-FLO SERIES1 1/2" Kits Assembly Instructions (PDF)