Testing Poly tube for leak

[Jag_Man653]

A while back I reported a pinhole leak in my whole-house RO system. I have now installed a separate RO system in each bathroom, thus eliminating the need for the 1/2" poly tube running through the attic.

I now have the section with the pinhole leak on the bench but cannot see the pinhole leak. The hole is too small to see with the naked eye. I know it's there because I have a video of it spraying out into my attic. So, I want to pressurize the tube to show exactly where the hole is. I tried filling it with water, plugging it at one end and blowing at the other end. As you might guess, I didn't have enough lung power to make it leak. My RO guy says under normal operation the RO tank pressure is about 3/4 of line pressure so I need to pressurize the tube to about 45 psi,

So my question is where can I get fitting(s) to go from a a bicycle pump or tire inflator, i.e. Schrader, to the 3/8" ID poly tubing?

BTW, if anyone wants to see the pinhole leak spraying out into my attic here's the video: Click here

 

[Fitter30]

Tire inflator x pipe thread fitting
Barb to pipe thread
Coupling
Didn't size any pipe thread size because what ever is available where u go and have. Small hose clamp.

 

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[Breplum]

gas pipe test gauge set is what we use but swap out higher range gauge for testing water.