External components like the flame sensor or 11072202 orifice shield may need to be sourced separately if needed

leak-proof connection to the pressure switch and heat exchanger ports

When the ignition sequence initiates

this part is specifically indexed for Reznor HVAC equipment

A resistored element like the SP10869NL is essential for glass-lined tanks

Maxitrol R400S-3/8-CSA Regulator Els PW 17895 External components like the flameThe Maxitrol R400S 3 8 CSA is a high performance gas pressure regulator engineered for precision fuel control in commercial and industrial HVACR applications. Built with a 3 8" NPT pipe size, this double diaphragm balanced valve design ensures stable outlet pressure even when upstream pressures fluctuate, preventing pilot dropouts and burner instability. The unit carries a CSA certified max inlet pressure of 1 2 PSI, though it has been Maxitrol tested