Quote: (Originally Posted by
lizardland)

On my homebuilds I found that the joint between the p-port body and the counterlung material failed before the plug did. No idea at what pressure though. I'm sure it would be different if fitted into a solid material.
Last year I mounted a female "P" port in an ABS fitting to test my AERO 57 O2 sensors under 1 2/3 atmospheres of pressure. i.e. about 20 feet of water. The test was to determine if they were challenged.
The "P" port system held up just fine.
Tom