it must be replaced with a genuine Williams P321826

Using non-specified sealants can cause premature failure and combustion leaks

and electrical ratings

the Weil-McLain 560-528-998 LP Gas Orifice is a critical component for ensuring precise stoichiometric combustion in propane-fired applications

preventing the gas valve from closing prematurely

BASO J991MDA-2 Pilot Burner Els PW 17895 it must be replaced withThe BASO J991MDA 2 Pilot Burner is a critical ignition component engineered for high reliability performance in commercial and industrial gas fired equipment. This aerated pilot burner features a #1 tip position (90 degree left hand) configuration, ensuring precise flame impingement on the thermocouple or thermopile. As a direct replacement for the J991MDA 2H, it maintains identical fit, form, and function, simplifying field maintenance for service