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The BMI USA 6420 is a lead-free brass threaded tee fitting designed for use in potable water and general plumbing distribution systems. It features a 1/2 x 1/2 x 3/4 inch configuration, making it suitable for reducing or branching applications where the run and outlet connections differ in size. Constructed from solid brass, this fitting provides reliable corrosion resistance and durability under standard residential and light commercial plumbing pressures. Licensed plumbers and pipefitters are the primary installers of this type of fitting.
This tee fitting is used in residential and light commercial plumbing systems where a branch connection is needed off a main supply line. The 1/2 inch run connections pair with a 3/4 inch branch outlet, allowing integration into systems where line sizes transition or where a larger supply feeds into a smaller distribution branch. Threaded connections follow standard NPT fitting conventions, making this part straightforward to source and install as a direct replacement or new installation component.
Designed as an OEM-style threaded brass tee fitting for use in standard residential and light commercial potable water and plumbing supply systems with 1/2 inch and 3/4 inch NPT threaded connections.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC requirements. Shut off the water supply and relieve system pressure before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to all male NPT threads before assembly. Do not overtighten threaded connections, as brass fittings can crack under excessive torque.
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