Has anyone heard of this new thing called "pressure testing"?
All you need is compressed air, some fittings, a gauge and a ball valve.
If it leaks there's this other really new thing called "snoop".
It's just water with a surfactant in it like dish washing detergent.
You spray it all over and where it bubbles, voilĂ*! You found the leak.
I know, I'm a genius. No need for compliments.