The FEBCO F683011 is a 3/4" LF825 Reduced Pressure Zone Backflow Preventer Assembly, Q-Turn, Y Pattern. Series LF825YA Lead Free* Reduced Pressure Zone assemblies feature a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. Activated through an add-on connection kit, the sensor can trigger the alert system sending notification of flood detection to facility personnel. Connection kits are available for BMS and cellular communication.