This 8 inch Cherne pneumatic test-ball winter plug is designed for a variety of applications including winterizing pools by blocking pipe systems. They can also be used for pressure testing and maintenance and installation of municipal infrastructures including storm and sanitary piping systems.
Made from natural rubber, these plugs are tough, tear-resistant and will work on any type of pipe including out-of-round pipe. These test-ball plugs have eyebolts for attaching a rope or clevis for lifting and lowering the plug.