Test Ball Plug, Pneumatic, Size 3 InMfr # 270032 Material Rubber For Use In DWV Systems to Seal Round and Out of Round Pipe Max. Back Pressure 30 ft of Head Type Pneumatic Required Inflation Pressure 35 psi Item Test Ball Plug Contains Pressure Release Valve No Air Connection Type Tire Valve Bypass Thread Gender Not Applicable Maximum Back Pressure (Air) 13 psi For Use On Pipe Test Plug Weight 0. 41 lb Air Connection Gender Male Body Textured No Air Connection Male Tire Valve Includes