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The Goodman 0259M00005 gas valve adapter is a genuine OEM fitting designed for the ACVC80803BXBD furnace and compatible Goodman/Amana gas furnaces. It provides the correct threaded transition between the gas valve and the manifold/supply line, ensuring a leak-tight, code-compliant connection. Use it when replacing a gas valve, reworking the manifold, or restoring a stripped or corroded original fitting.
The genuine OEM adapter guarantees the exact thread pitch, length, and seat geometry required for a gas-tight seal on your furnace. Generic fittings can have thread tolerance mismatches that lead to slow gas leaks — an unacceptable safety risk. For any gas-carrying component, OEM is strongly recommended.
Moderate. Requires shutting off the gas supply, applying approved pipe-thread sealant, and leak-testing the connection with soap solution after install. Because this carries combustible gas, replacement is best performed by a licensed HVAC or gas technician.