By using genuine Reznor 64391 components

the valve utilizes a standard port design with RPTFE seats and MPTFE stem packing

For technicians servicing these units

measuring approximately 18-1/2 inches by 7 inches

Don't settle for "close enough"—precision-engineered classical V-belts like the 35F19 prevent premature bearing wear and optimize motor performance

BASO K16FA-18 Thermocouple By using genuine Reznor 64391The BASO K16FA 18 Thermocouple is a high performance standing pilot ignition system component designed for reliable flame sensing in commercial and residential gas applications. This 18 inch thermocouple generates an open circuit millivolt range of 25 to 35 mV, ensuring stable communication with the safety shutoff valve. It features a specific junction lead length of 3. 546 inches, making it a critical HVAC replacement part for systems requiring