Sioux Chief introduces the newest addition to the PowerPEX family of PEX fittings. Multiport tees for ASTM F1807 and F1960 systems are now available. These tees are made from top-quality, C69300 brass material, which is No Lead compliant and resistant to dezincification and stress-corrosion cracking. Several trunk and branch patterns are available to suit most applications. The new 672XGT series tees can be found on our website and current price index. Sioux Chief.