Add a T intersection to create a lateral line or branch in your drip system with the 5/8 in. Compression Tee. The fitting joins three sections of 5/8 in. supply tubing or dripline. To install, insert tubing inside the compression ring, where an internal barb compresses the tubing for a watertight connection. Having trouble with the tubing? Try rocking it back and forth while applying pressure, or soften the tube with a hot water soak or leaving it out in the sun. This compression fitting is made of acrylonitrile butadiene styrene (ABS) treated with UV inhibitors to prevent cracking.Find the TEE COMPRSSN 5/8 2PK at Ace.