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The ANDERSON METALS 730561-06 is a Copper Tube Size (CTS) insert stiffener designed to reinforce the end of soft copper or flexible plastic tubing at a compression fitting connection. Manufactured from lead free brass, this stiffener slides inside the tube end to prevent collapse or deformation when the compression nut and sleeve are tightened. It is rated for a maximum working pressure of 2000 psi, making it suitable for demanding residential and light commercial plumbing and water service applications. Plumbers and pipefitters install this component whenever soft or flexible tubing is joined at a compression-style NPT fitting to ensure a leak-free, structurally sound connection.
This insert stiffener is used in residential and commercial plumbing systems where CTS tubing terminates at a compression-to-NPT fitting. Typical applications include potable water supply lines, water distribution manifolds, and fixture supply connections. The tube-by-NPT end configuration allows the stiffener to support the tubing wall at the point where it meets a threaded NPT port. It is packaged in quantities of five, suited for service technicians and contractors who perform multiple repairs or installations in a single job.
Designed as an OEM-style insert stiffener for use with CTS compression fittings in residential and commercial plumbing systems where soft copper or flexible tubing connects to NPT-threaded ports.
Installation is performed by licensed plumbers or qualified pipefitters. Shut off the water supply and relieve line pressure completely before disassembling any compression fitting. Slide the stiffener fully into the tube end before positioning the compression nut and sleeve. Follow all applicable codes, including IPC and local plumbing authority requirements, for potable water piping materials and connection methods.
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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