Raindrip 10 Pack 1/2" Green ABS Glue In Compression Adaptors. These adaptors glue into 1/2" PVC fitting to convert to 1/2" compression adaptor. Simply slide the 1/2 in. fitting onto PVC pipe and solvent weld for a watertight connection; insert 1/2 in. supply tubing into the compression ring on the other side, where an internal barb holds the tubing in place. Made of polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS), treated with UV inhibitors to prevent cracking.