Safe-T-Seal, Professional Drain Line Test Plug, Features Never over inflate, patented pressure relief valve which releases excess air while still holding pressure, Waffle Pattern Exterior, three foot Heavy Duty Pull Strap keeps user safely away from the danger zone, Heavy Duty Handle with built in 3/4 inch hex wrench to remove air valve for water fill application, Inflates Using Water Or Air, Best Inflation Pressure Is 50 PSI Maximum Back Pressure Of Water Is 30', If Water is Used, Unit Will Both Test & Fill Drain Simultaneously, Fits Drains 1-1/4" To 3" Diameter.

• 1-1/4" to 3" Drain Test Plug
• Inflates Using Water Or Air
• Heavy duty pull stap
• Built in 3/4" hex wrench to remove air valve
• Patented built in pressure relief valve releases excess air while still holding pressure