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The HARCO 75-10844 is a 1-inch compression-by-compression coupling with an integrated stop, designed for use with copper tubing size (CTS) pipe. The internal stop positions the tubing consistently during assembly, ensuring a repeatable, leak-resistant connection without requiring special tooling. This fitting is suited for residential and light commercial plumbing applications where CTS tubing is joined or repaired. Licensed plumbers and pipefitters are the primary installers of this type of compression fitting.
This coupling is used in supply line repairs, water distribution runs, and retrofit situations where soldering or gluing is not practical or permitted. The compression design allows connection without heat, making it appropriate for installs near finished surfaces or in tight spaces where torch access is limited. It accepts 1-inch CTS tubing on both ends and is compatible with standard compression nuts and ferrules typical of CTS plumbing systems.
Designed as an OEM-style compression fitting for 1-inch copper tubing size (CTS) plumbing systems in residential and light commercial water supply applications.
Installation is typically performed by a licensed plumber. Shut off the water supply and relieve line pressure before cutting into existing tubing. Ensure tubing ends are cut square and deburred before seating into the fitting body against the internal stop. Follow local plumbing codes, including applicable IPC provisions, for compression fitting use in potable water systems.
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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