Product Parameters: Proportional Range:1-10%(1:100-1:10);Flow Range:0.044-13.21 GPM;Working Water Pressure:2.9-87 PSI;Working Water Temperature:1-50 ℃;PH:3-11;Connection Size:3/4" NPT;Please note the fertilizer injector can only be used to mix liquids,not gases Water Powered Fertilizer Injector: POM housing,more strong,impact resistance,weather resistant and corrosion resistant;Upgraded inner structure and higher quality materrial seals,more stable for working;Attached specially designed one-way valve(can be installed on the pump inlet) to effectively prevent liquid backflow;Perfect for home growers and pros alike Liquid Dosing Pump: This dosing pump can be widely used in industries that need to dilute chemical liquid solution,such as agricultural drip irrigation,livestock breeding,industry,nutrient delivery system,car washing,and water treatment(like oxidizer injector for water well),etc; Greatly time saver; Ideal choice to water or fertilize plants(like grass,lawn,flower,fruits,vegetables) and crops in garden,greenhouse or agriculture Liquid Dosing Pump: Can be widely used in industries that need to dilute chemical liquid solution,such as agricultural drip irrigation,livestock breeding,industry,nutrient delivery system,car washing,and water treatment(like oxidizer injector for water well),etc;Greatly time saver;Ideal choice to water or fertilize plants(like grass,lawn,flower,fruits,vegetables) and crops in garden,greenhouse or agriculture Easy to Use: Attach to water hose,set the dilution rate,turn on the faucet,the fertilizer injector will automatically and evenly mix the water and concentrate; Value for money,greatly saving your money for purchasing a more expensive one; If the item you received is a little wet,or has some sound during working,please be assured it's normal Water Powered Fertilizer Injector: When water flow going through the dosing pump,its flow rate will be reduced.At the same time,the piston and connecting rod will run inside to suck up the liquid concentrate,then mix with water via volumetric proportioning,finally delivery the diluted liquid for use.