Cherne mechanical test plugs can be used in a wide variety of applications including DWV and stack testing. With a variety of end-of-pipe and in-pipe options available, it's easy to find the right mechanical test plug for the job. The Kwik ‘N Sure plugs are designed for high-pressure applications and work in all types of pipe, ideal for plugging water line stub-outs. They feature a natural rubber O-ring and wing nut and hex nut on select sizes. Cherne Industries is a global leader in pipe plug, blocking and testing.