Does the gasket require any additional sealant or RTV

this lower thermostat provides precise thermal sensing to maintain consistent water temperatures and system efficiency

leak-free seal vital for maintaining the integrity of the combustion system

Is the 272708A different from the 272708A/U

022" NG orifice fits standard 3/16-inch tubing or 1/4-inch adapters

Williams P213400 Switch Does the gasket require anyThe Williams P213400 Fan Selector Switch F160 30F is a critical OEM spec replacement component engineered for high performance direct vent and gravity wall furnaces. As a primary HVAC blower control switch, this unit facilitates precise multi speed fan regulation to maintain optimal thermal distribution and equipment efficiency. Designed specifically as a Williams furnace replacement part, the F160 30F integrates seamlessly with Williams models