Orbit 3/4" x 1/2" Thread Plastic Saddle Tee for Sprinklers to Poly Pipe - 37120 - Walmart.com
Amazon.com : CBI Pipe & Supply Tool Division Pipe Fence Weldable Saddle Cap - Versatile & Durable Solution for Pipe Fencing Applications - Saddle Cap Designed to Fit Pipes Range of 2