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The WILKINS 1-TPKXLC is a 1-inch lead-free union nut sweat tailpiece designed for use with Wilkins backflow preventer and pressure-reducing valve assemblies. This fitting connects the valve body to the supply piping using a sweat (solder) end connection, allowing for a secure, serviceable joint that can be broken and reassembled without cutting pipe. The lead-free construction meets current potable water plumbing code requirements. It is installed by licensed plumbers during new installation or valve service.
This tailpiece is used in residential and light commercial plumbing systems where Wilkins valves require proper end connections. The sweat end accommodates standard copper tubing, and the union nut design allows the tailpiece to be separated from the valve body for inspection or replacement without disturbing the surrounding piping. It is a common replacement or spare component kept on service vehicles by plumbers working on Wilkins valve assemblies.
Designed as an OEM-style replacement tailpiece for Wilkins backflow preventer and valve assemblies requiring a 1-inch union nut sweat end connection.
Installation is performed by a licensed plumber. Shut off the water supply and relieve system pressure before disassembling the union connection. Use standard copper sweat soldering tools and lead-free solder in accordance with IPC and local plumbing code requirements. Allow the joint to cool fully before restoring pressure and checking for leaks.
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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