This HEPA prefilter replacement serves as the primary stage of filtration

The stranded copper core and 7mm high-grade insulation prevent voltage leakage and ensure high-energy spark transfer even at elevated max temperatures of 484°F

Always verify your specific unit's wiring diagram to ensure the 155-20F specification matches

leak-proof seal during the reassembly of the valve head

ensuring reliable circuit interruption when plenum temperatures exceed safe operating parameters

Williams P501705 Gas Valve Els PW 17895 This HEPA prefilter replacement servesThe Williams P501705 Gas Valve is an essential OEM component tailored specifically for natural gas heating systems. Engineered with a 1 2" NPT inlet and 1 2" NPT outlet, this snap action gas valve maintains a precise manifold pressure of 10. 5" WC (water column). Built for reliability in high demand environments, it is rated for approximately 70,000 BTU on natural gas applications. This combination valve functions as both a low voltage control and an