When utilized as a line pressure regulator indoors

Using it in a positive pressure configuration will result in improper switching and system lockout

As a veteran-grade Honeywell valve repair kit

The Reznor 221251 is a critical OEM replacement pressure switch designed for precision airflow monitoring in Reznor HVAC equipment

Designed for high-capacity performance

Johnson Controls P352PN-4 Pressure Control Els PW 17895 When utilized as a lineElectronic Proportional Pressure Control, 240 to 600 Psi Setpoint, 10 to 100 Psi Throttling Range, 24 Vac ( Supplied by Y350R Power Module ), 0 to 10 Vdc and 0 to 20 mA Analog Output, Direct or Reverse Action is Jumper Selectable, LED Indication, Nema 1 P352PN 4 is identical to P352PN 4C