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The MUELLER INDUSTRIES G012-10 is a steel male adapter fitting designed for natural gas and propane connections in residential and light commercial piping systems. It transitions from a 5/8 inch female flare seat to a 1/2 inch male iron pipe (MIP) thread, allowing a flared tubing line to connect to a threaded pipe or appliance inlet. The all-steel construction provides the strength and corrosion resistance required for gas service. Licensed plumbers and HVAC technicians install this fitting as part of gas supply line assemblies, appliance connections, and service work on gas-fired equipment.
This fitting is commonly used when connecting flexible gas connectors or copper flare tubing to a threaded gas valve, manifold, or appliance stub-out. The 5/8 inch flare inlet accommodates standard flared tubing used in residential gas appliance hookups, while the 1/2 inch MIP outlet threads into standard iron pipe fittings or valve bodies. Typical applications include gas range connections, dryer connections, water heater stub-outs, and furnace supply line work.
Designed as an OEM-style replacement and standard trade fitting for gas supply line connections requiring a 5/8 inch flare to 1/2 inch MIP adapter in steel construction. Cross-referenced as BRAGC12MAL, MAU2-10-8, and 62730.
Installation must be performed by a licensed plumber or qualified HVAC technician in accordance with local codes, the International Fuel Gas Code (IFGC), and applicable ANSI standards. Shut off the gas supply at the meter or isolation valve before making any connections. Apply an approved gas-rated thread sealant or PTFE tape rated for gas service to the MIP threads before assembly. Pressure-test all connections after installation per local code requirements before restoring gas service.
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