How do I verify if this replaces my existing G775RGA-2

The McDonnell & Miller 354141 is the specific long barrel replacement for the PA-800-U assembly

How does the Parker A81OE handle variable loads

and mixed gas systems

To maintain AER compliance and equipment safety

Lochinvar & A.O. Smith 100108951 Thermostat 321894-706 How do I verify ifThe Lochinvar & A. O. Smith 100108951 Thermostat is a critical OEM replacement part designed for high performance commercial and residential electric water heaters. As a heavy duty upper thermostat, it provides precise temperature control to ensure the heating elements cycle correctly and maintain system efficiency. This thermal regulator comes integrated with an Emergency Cut Off (ECO) safety switch, which manually trips to prevent overheating