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The NDL INDUSTRIES w10107 is a 4-1/8 inch rolled stop copper coupling designed for sweat-connect (C x C) copper piping systems. The rolled stop is an internal shoulder machined into the fitting body that positions each pipe end at the correct insertion depth, ensuring consistent, repeatable solder joints. This fitting is used by licensed plumbers and pipefitters working on copper supply, distribution, or hydronic piping. Its full copper construction provides the corrosion resistance and thermal conductivity that soldered copper systems demand.
This coupling is suited for residential and light commercial plumbing installations where 4-1/8 inch copper pipe is being joined, extended, or repaired. The C x C connection type requires standard soldering (sweat) technique on both ends. The rolled stop eliminates the need for a separate stop gauge, making it a practical choice for production plumbing work or service calls where speed and accuracy matter.
Designed as an OEM-style sweat coupling for use with 4-1/8 inch nominal copper pipe in standard C x C plumbing configurations.
Installation should be performed by a licensed plumber following local plumbing codes and IPC guidelines. Shut off and drain the water supply line before cutting or fitting pipe. Clean both pipe ends and fitting sockets thoroughly with emery cloth and flux before applying heat. Avoid overheating the fitting, as excessive heat can burn flux and result in a void or cold solder joint.
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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