Make the transition from PVC pipe to distribution tubing or dripline with the 5/8 in. X 1/2 in. Slip PVC Compression Adapter. To install, simply slide the 1/2 in. fitting onto PVC pipe and solvent weld for a watertight connection; insert 5/8 in. supply tubing into the compression ring on the other side, where an internal barb holds the tubing in place. This adapter is made of polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS), treated with UV inhibitors to prevent cracking.