Cherne 274534 4″- 6″ MS2 Long Test Ball Plug 13 PSI, 30 FT

Designed for waste stack testing from floor drain to sewer pipe. Long enough to seal away vertical riser and sewer run. Multi-stage deflation eliminates backsplash. Works in multiple pipe diameters. Pressure relief valve to safeguard against over-inflation. Nylon strap and safety handle prevents plug from sliding down a line.