Flexible, rubber, inflatable test plugs for 1 14" to 10 nominal pipe size. 100% inflation tested. Perfect for the full spectrum of testing requirements, from stack pressure testing to blocking residential in DWV systems, as well as repair, maintenance and installation of municipal infrastructure, including storm and sanitary sewer piping systems. No test water backsplash. Non-pressure, gravity flow applications only. Recommended for above and underground installations. Easy to install and reuse. Multiple sizes from 1 14" to 18 NPS.