For professional contractors handling deeper wall installations

Simplified Installation: Standard 3-wire or 4-wire hardwired setup fits existing wall-mount footprints (4

Overpressure Protection: Built-in IRV eliminates the need for external relief valves in most standard residential configurations

Rugged Aluminum Casting: Industrial-grade housing resists environmental corrosion and operational heat cycles

Johnson Controls P72AA-18 Pressure Control Els PW 29614 For professional contractors handling deeperDual Pressure Control, DPST Switch Only, 3 4" Conduit Opening, 12" to 50 Psi, Nema 1 Enclosure, No Adjustment Knob, Amoonia Use P72AA 18 is identical to P72AA 18C