Series A200 Flow-Through Trap Primers are used in commercial and residential applications to assure delivery of water to floor drain traps to prevent the evaporation of the water seal that protects a building or room from sewer gas fumes. It consists of a bronze body construction with a Celcon seat and disc. Available in threaded (Model A200) or union solder (Model A200S) connections. Minimum Supply Pressure: must exceed 25psi (172kPa), Maximum Supply Pressure: 125psi (8.6 bar).