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The NIBCO INC T00045D is a 3/4-inch transition adapter coupling designed to connect PVC pipe to CPVC tubing in a single fitting. It bridges the gap between these two common plastic piping materials, allowing installers to transition from a PVC run to a CPVC run without cutting in additional fittings or using solvent incompatible with either material. Licensed plumbers and pipefitters install this coupling in both new construction and retrofit applications where PVC and CPVC systems meet. The fitting ships in a package quantity of 10 units, making it practical for job-lot purchasing on multi-drop projects.
This adapter coupling is used in residential and light commercial plumbing installations where a system transitions between PVC and CPVC pipe of the same nominal diameter. Common scenarios include connecting CPVC hot-water distribution lines to PVC cold-water mains, or joining legacy PVC drain-adjacent supply runs to CPVC sections required by local code or design spec. The 3/4-inch by 3/4-inch sizing fits standard 3/4-inch nominal pipe in both material types.
Designed as an OEM-style transition fitting for use with standard 3/4-inch nominal PVC and CPVC pipe in residential and commercial plumbing systems.
Installation is performed by a licensed plumber following applicable IPC or local plumbing code requirements. Shut off the water supply and depressurize the line before cutting in the fitting. Use the correct solvent cement for each side of the transition — PVC cement on the PVC socket and CPVC cement on the CPVC socket — as cross-applying solvent can compromise joint integrity. Allow full cure time per the cement manufacturer's instructions before restoring pressure.
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