On Mon, 25 Jan 2021 09:05:53 -0500 (EST), justan wrote:

Bill Wrote in message:r
Getting a new heater and AC system. When the guy was under house doing theducts, he found two leaks in the water lines. Plumber could not get therefor a week, so decided I had to crawl under and do the job. Leaking pipeto a Union and a leaking sweated joint. Water still dripping from lines,so near impossible to solder. Used Sharkbite connectors. Fabulousinvention.

Sharkbite, PEX, and other relatively new plumbing materials are
good things to know about. I was thinking of using PVC to run air
compressor air lines around the perimeter of my garage until I
read some horror stories about that material and decided to use
PEX instead. I used a number of Sharkbite fittings but I had
trouble sealing one particular PEX to 1/2 NPT Sharkbite fitting.
in this case I used a Flair-it brand plastic fitting instead. It
screws together; no tools required.

Maybe I build for the next millennium but my shop air is running in
galvanized, gas rated pipe. (Gas rated only means the inside is less
likely to flake off). That is also what they use for Nat Gas and
Propane if it isn't plastic or CSST. Black iron rusts up here.