Test Plug Air Connection Gender Female Air Connection Size 15/32 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 6.88 in Deflated Length 20 in For Maximum Pipe Inside Diameter 12 in For Maximum Pipe Size 12 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 10 in Head Tether Connection Handle and Strap Inflated Length 30 in Maximum Back Pressure (Air) 36 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1