Originally Posted by paintdrying
Leak is a lot easier to sweat with air as opposed to water.
"I never sweat with air or water, I use silver solder ,Stick, stay brite.
The point is safety that's the reason Hydrostatic testing is used not whether a job is easier or not.
Just buy a hand grenade hold it in your hand and pull the pin, don't throw it just hold it see what happens.
That's what could happen it the system over pressurizes. Never say never things happen.
Suppose your pressurizing a system and the gauge and regulator is faulty, BOOM.
Suppose your filling a system with air and someone takes your attention away (ever have that happen)?) BOOM. Not likely but it only takes one time. I've used air, freon, nitro, water, etc, etc many times but I am not telling you or any one else to do it. It all depends upon size, specifications, and the type of job and many other things I am sure. Use what you want to leak check your going to any way. Just picture testing Oxygen tanks, Nitrogen tanks, Hydraulic tanks, Boilers with air at a couple thousand pounds . Air or water?