Orbit 67452 Drip-Lock Tee, 1/2-Inch Use for connecting 1/2-Inch distribution tubing Unique release feature simplifies installation and maintenance Works with the most common sizes of 1/2-Inch Drip tubing (.690, .700 and .710 O.D.) Works with 1/2-Inch Orbit, 5/8-Inch Raindrip, Toro Blue Stripe, 1/2-Inch DIG and 1/2-Inch Mister Landscaper Drip Tubing For outdoor use with cold water only