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The BSC PREFERRED DIB73PCLF is a straight union connector designed for joining a 1/2 inch female iron pipe (FIP) thread to a 3/8 inch OD compression fitting in a single inline connection. This fitting serves as a transition union in water supply and distribution lines, allowing a threaded pipe run to connect directly to soft copper or flexible tubing without additional adapters. It is manufactured to contain no more than 0.25% weighted average lead content on wetted surfaces, meeting lead-free compliance requirements for potable water applications. Plumbers and pipefitters install this fitting in residential and light commercial plumbing systems.
This connector is suited for residential water supply lines, under-sink installations, and light commercial plumbing applications where a threaded female iron pipe connection must transition to 3/8 inch OD tubing. Typical use cases include connecting supply stops to faucet supply lines, ice maker lines, and similar low-pressure water distribution runs. The straight union configuration allows the connection to be made and broken without disturbing the surrounding piping, which is useful during fixture service or replacement.
Designed as an OEM-style replacement or new-installation fitting for residential and light commercial plumbing systems requiring a 1/2 inch FIP to 3/8 inch OD straight union transition.
Installation is performed by a licensed plumber or qualified pipefitter. Shut off the water supply and relieve line pressure completely before disassembling any existing connections. Apply thread sealant tape or compound to the FIP threads before assembly; hand-tighten first, then bring to snug with a wrench — do not overtighten. Work must comply with applicable local plumbing codes and the International Plumbing Code (IPC) where adopted.
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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