Gems Sensors A2012-S150 Solenoid Valve, 24 V, 60 Hz AC, 125 PSI Replacement solenoid valve for commercial and in-home humidifiers Fits Aprilaire Models: 110, 112, 220, 224, 350, 360, 440, 550, 550A, 550-A, 558, 560, 560A, 560-A, 568, 600, 700, 760, 760A, 760-A, and 768. Replaces OEM valve models A2012-S118, B2035-S2, B2035-S5, B2035-S54, B2035-S55, B2015-S51, B2015-S54, B2015-S58, B2015-S65, B2015-S68, B2015-S85, B2015-S87 Rated to 125 PSI supply pressure 24VAC, 50/60 Hz In-line strainer supplied