Test Plug Air Connection Gender Female Air Connection Size 5/16 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 1.19 in Deflated Length 8 in For Maximum Pipe Inside Diameter 3 in For Maximum Pipe Size 3 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 1 1/4 in Head Tether Connection Handle and Strap Inflated Length 6.25 in Maximum Back Pressure (Air) 45 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1