This PVC Compression Ring can be solvent welded onto a 3/4 in. PVC slip fitting (sold separately) to form a leakproof compression adapter to transition from 3/4 in. pipe to 900 Series supply tubing or dripline (0.940 in. OD). Tubing is inserted into the gray compression ring, where an internal barb compresses into the tube to hold it in place. Compression ring is made of PVC and treated with UV inhibitors to prevent fading and cracking.