This is a Supply Giant C x C x C reducing tee with a cast brass construction. The solder cups on the straight run have a diameter of 4 X 4-inch nominal size and it Branches into a solder cup of 1/2-inch, for use with copper pipes with an outer diameter 4 X 4 X 1/2-inch. This fitting is produced to meet all applicable standards. In addition to its inherent qualities it looks beautiful and is durability at low maintenance. Copper's reusability makes it an ideal application in sustainable projects and are applications in Potable water systems, Hot and cold water systems, Heating systems, Gas systems, Fire protection systems, Solar systems etc. It has ASTM B75 Alloy C12200, Third-party certified to NSF/ANSI 61 and 372, ASME B16. 22. ⚠ California Proposition 65 Warning: This product is known to the state of California to cause cancer, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.