1-1/2" qwik cap. Qwik Caps offer a quick, easy way to cap pipe ends, cleanouts and open test pipes. Low cost and reusable. Made of flexible PVC, they're suitable for above-ground or underground use, on cast iron, steel, copper or plastic piping. The convex face allows the cap to withstand greater pressure for testing purposes and minimizes ballooning. To install, simply place over open end of pipe and tighten to 60"lbs. torque.