It is a direct cross-reference for Honeywell Q340A and Johnson Controls K19 series

Durable 304 SS probe construction protects the sensing element from thermal shock and vibration

The integrated electric switch allows for local manual shutoff during servicing without needing to disconnect the 24V wiring harness

Designed for natural gas service (LP conversion capable with appropriate kits)

Is the 002663B compatible with all Raypak model heaters

United Electric J21K-254 Pressure Switch R-22 It is a direct cross-referenceThe United Electric J21K 254 Pressure Switch is an essential component for demanding HVACR and industrial filtration applications, specifically designed to monitor differential pressure with high precision. This 0 90# SPDT NEMA1 Pressure Sw. features opposing metal bellows that accurately sense the pressure delta between two points, making it ideal for differential pressure switch hvac tasks such as monitoring chiller oil pressure, filter status