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The B K/MUELLER INDS(IMPORT) 520-002HN is a 3/8 inch black 90 degree equal elbow fitting designed for gas piping and similar threaded pipe systems. This elbow changes flow direction by 90 degrees while maintaining a consistent 3/8 inch diameter through both ports. The black iron construction is standard for gas distribution lines in residential and light commercial applications. Each package contains 5 elbows, making this a practical choice for service technicians stocking up for multiple connections on a job. Licensed plumbers and HVAC technicians are the primary installers of this fitting type.
This elbow is suited for threaded black iron pipe systems commonly used in natural gas and propane supply lines within residential homes, commercial kitchens, and light industrial settings. It handles standard low-pressure gas distribution piping where a 90 degree directional change is required. The equal-end design means both ports are the same size, simplifying part selection and installation planning.
Designed as an OEM-style replacement or new-installation fitting for 3/8 inch threaded black iron pipe systems in residential and light commercial gas distribution applications.
This fitting is installed by licensed plumbers or HVAC technicians following local gas codes and IFGC requirements. Shut off and verify gas supply is fully depressurized before disconnecting or installing any gas line fitting. Apply approved pipe thread sealant or thread tape rated for gas service to all male threads before assembly. Pressure-test the completed assembly per code before restoring gas flow.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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