1. DACHENG multi size rubber pipe plug has a minimum and maximum sealing size range and maximum allowable back pressure.
2. Confirm the detail use of the pipe plugs, if used for air testing please choose bypass plug and without bypass plug.
3. Confirm the medium in the pipe.
4. Measure the diameter of each pipe and then check the following table about the plug and pipe range, please choose the plug which be used in a pipe size range we recommended.
5. Please tell us the back pressure.