How To Pressure Test Your Pipework

Tests hydraulically for leaks in installations which are required to be leak proof
Especially for use in heating, compressed air, refrigeration systems, oil installations, sprinkler systems and other small bore pipe installations

[lonesquid]

Hello - this looks great. It is not obvious to me though, how you can be sure you got all the air out - since your plumbing provides 2 routes to the exit, isn't it possible that air could be trapped in one or the other routes? Perhaps it is a matter of feel as you pump and the resistance is not "spongy" (as it maybe would be if you were compressing some trapped air)?