Most EZ-FLO fertilizer injectors require a minimum of 120 gallons per hour (GPH) of water moving through the unit to operate properly. If an irrigation system is using less than 120 GPH, a flow restrictor disc may be inserted into the EZ-FLO installation coupler to allow it to operate.
Three flow restrictor discs are included in this EZ-FLO Flow Disc Kit enabling the injector to operate with water flows down to 7.5 GPH.
White Disc: 120 to 60 GPH
Black Disc: 60 to 30 GPH
Red Disc: 30 to 7.5 GPH