I believe the topic has been discussed on eHam before (https://www.eham.net/article/21921) Theres some good points there and some of the comments are pure bull from people who have no idea what they are talking about. PVC is engineered to hold water, which isn't compressable, not gas, which compresses and then rapidly expands. Think of a water ballon. When you fill a ballon with air then stick a needle to it, it pops violently...loud bang. When you fill a balloon with water and poke it with a needle, it just collapses, no boom. Thats because gas compresses. Liquid doesn't. That's the physics of why a bottle jack the size of a coke bottle can lift 20 tons, we fill bottle jacks with oil, not air. Household water pressure is normally 40 PSI so you can pressurize a PVC pipe with water in your house, and if the pipe breaks, it simply leaks, it doesn't explode and fly apart. But if you pressurize that PVC pipe with 40 PSI of gas, when it breaks, it explodes and sends PVC fragments everywhere. When we test our SCUBA cyliners, DOT requires us to pressurize the aluminum cylinders to 5,000 PSI and most steel cylinders to 7,000 PSI. Sometimes they fail. We test them by submerging them in a water-filled sealed steel vault, then pumping them full of water, up to 7,000 PSI and hold for several minutes. When they fail DOT recertification and burst, nothing much happens...they don't explode (water doesn't compress). There's a "thud" noise and the PSI gauge goes from 7,000PSI to 0 almost instantly. If we filled them with air and they failed, they'd blow the whole buildng apart...gas expands violently. There was a guy here in NC a few years ago who had stored his scuba cylinders full in his garage with 3,000 PSI of gas in them. He was in his garage and knocked one over when he bumped it with his leg. The resulting explosion killed him, his wife who was in the house lived but lost her legs, it blew the garage off the house, and the concusion shattered the windows in the next door neighbors houses. Compressed gas is nothing to play with.
When I became club secretary (and webmaster) there was a PDF instruction for how to build a PVC "line launcher" on our website one of the members had drawn up years ago. The first thing I did was remove it. As soon as some Internet dude builds one and uses our clubs plans and blows his face off, our club wouldn't be able to afford the lawyer to defend the lawsuit.
Have you seen these soda machines at Bed, Bath, and Beyond? The little cannister of nitrogen is about the size of a can of hairspray. It's what puts the fizz in the soda you can make at home with this machine. That cylinder has to be DOT approved, bear a DOT stamp, be requalified every 5 years by a DOT licensed tester, and it's classified as HazMat and illegal to refill. That little can will literally blow your kitchen away if it fails.
I mean, if I was in some emergency situation and my life depended on me using a tater gun to get a resuce line to safety, sure, what would I have to lose in that scenario. But my opinion is, ham radio isn't worth blowing my face off and spending $200,000 on plastic surgery if I survived just to get an antenna line over a tree limb. When PVC filled with gas fails, it fails violently.