High backpressure reduces the pressure differential necessary for the thermodynamic disc to seat

it is recommended to use copper sensing bulb straps to ensure a consistent thermal bond with the suction header

it creates a reliable water seal that prevents high-temperature vapor from reaching the sensitive bellows of your Honeywell L404

use a standard service wrench to adjust the stem in small increments

Standard Compatibility: The 3/8" ODF sweat fittings provide a seamless fit for most standard suction lines

Lennox 94C90 Gas Valve THPU32HP7Y High backpressure reduces the pressureThe Lennox 94C90 is an OEM standard opening natural gas valve designed for precision fuel regulation in residential and light commercial heating systems. Operating on a 24V AC control circuit, this valve features a 3 4" x 3 4" NPT connection, ensuring high capacity flow for larger BTU furnace applications. As a direct OEM replacement gas valve, the 94C90 is identical to part number 94C9001 and is commonly found in Lennox G11 and G12 series units. It