The 22-143 check valve tee is designed to thread directly onto the upper port of the 22-120 socket

delivering a stable pilot flame that prevents nuisance lockouts and ensures the main burner orifice ignites without delayed ignition or "booming

the unit features a robust polycarbonate housing and a silicone diaphragm

preventing damage to the unit heater burners and protecting occupants from potential CO leaks

It will restore the connection once the sensing element cools to 115°F

Functional Devices RIB02BDC Relay The 22-143 check valve teeThe Functional Devices RIB02BDC is a performance grade enclosed relay designed for high voltage switching applications in commercial HVACR and building automation systems. Built with a 20 Amp SPDT contact rating, this pilot device operates reliably on a 208 277 Vac coil, making it ideal for controlling lighting loads, motor branch circuits, and electric heat stages. The pre packaged design features a 1 2" NPT nipple for direct mounting to electrical