Orbit DripMaster 67447 3/4-Inch PVC to 1/2-Inch Drip Tube Adapter Ideal for connecting 1/2-inch (.690-.710) distribution tubing to 3/4-inch pvc pipe. Just glue the slip fitting to 1/2-inch pvc pipe and insert the tubing into the tubing adapter Works with 1/2-inch and 5/8-inch tubing (690-710) Durable construction provides years of reliable use For outdoor use with cold water only