

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The NDL INDUSTRIES W40313 is a 5/16-inch copper solder-joint tee fitting designed for supply and pressurized plumbing systems. It connects three pipe runs at a single junction using a female solder-cup end style on all three ports, allowing for a clean sweat-solder installation. Measuring 1.08 inches in length, 0.36 inches in width, and 0.71 inches in height, this compact fitting is built for tight spaces. Wrot copper construction provides excellent corrosion resistance and long service life in potable water and hydronic applications. Licensed plumbers and pipe fitters install this fitting as part of standard copper distribution work.
This tee fitting is suited for residential and light commercial plumbing installations where 5/16-inch copper tubing is used in supply or pressurized distribution lines. Typical applications include water supply rough-in, refrigeration tubing runs, and other small-diameter copper piping systems. The solder-joint design conforms to established sweat-fitting standards, making it straightforward to integrate into new construction or retrofit work where copper is the specified material.
Designed as an OEM-style solder-joint replacement fitting for residential and light commercial copper plumbing systems using 5/16-inch copper tubing.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and depressurize the line before cutting or fitting work begins. Ensure all pipe ends and solder cups are clean, deburred, and properly fluxed before applying heat. Avoid overheating the fitting, as excessive heat can damage the copper and compromise the solder joint seal.
Thanks for subscribing!
This email has been registered!