Common Questions Is the DP140005U21D suitable for outdoor installations

Visual Diagnostics: High-visibility LED provides immediate onsite confirmation of load status and setpoint crossing

The VG7441PT features a standard threaded stem and is compatible with various Johnson Controls VG7000 Series electric and pneumatic actuators

Standardized Compatibility: Features a universal 3/4 inch NPT solenoid connection for easy integration into existing piping

Lochinvar & A.O. Smith 100109951 Pressure Switch 322057-301 Common Questions Is the DP140005U21DWhen you are troubleshooting a pressure switch failure on a high efficiency hydronic system, the Lochinvar & A. O. Smith 100109951 is the specific OEM replacement part required to restore precise combustion air pressure monitoring. This air pressure switch is factory calibrated for the BTN 200 366 series water heaters and boilers, ensuring that the blower is moving sufficient air for safe ignition. As a normally open (NO) switch with a set point of 2.