Test Plug Air Connection Gender Female Air Connection Size 7/16 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 4.5 in Deflated Length 15.25 in For Maximum Pipe Inside Diameter 8 in For Maximum Pipe Size 8 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 5 in Head Tether Connection Handle and Strap Inflated Length 23.38 in Maximum Back Pressure (Air) 43 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1