- Commercial Engineered Polymer (EP) branch multi-port tees feature an integrated 3/4 or 1 in ProPEX® inlet with 1/2 in ProPEX® branch outlets, or a 1-1/4 in ProPEX® inlet with 3/4 in ProPEX® branch outlets. Designed for commercial plumbing applications, they eliminate the need for multiple connections. The tees are made of EP, which is proven in demanding hot-water applications. The 3/4 and 1 in multi-port tees come with mounting clips and screws.