Sioux Chief's PPSU AccuCrimp PEX fitting and manifold system shall be used to make 1/2, 3/4, and 1 safe plumbing and heating connections. AccuCrimp fittings are approved for use with ASTM F876 PEX tubing with either copper crimp ring or V-Sleeves. AccuCrimp fittings shall incorporate the patented feature of positioning fingers, which perfectly align either a crimp ring or V-Sleeve over the barbs.