Why? As before mentioned once you glue it it is stuck, can't reuse fitting. Also, it will explode if it freezes.
Pex = Win
1/2" PEX is the standard I use. While you can buy Sharkbite push in fittings, you will spend a couple hundred in fittings alone running a system in a food truck. I use the crimp fit style, little copper rings the squish onto the fittings. To do that however, you gotta spend like 60 bucks on the tool.
Did I mention PEX doesn't explode if it freezes? It is designed to expand rather then crack.
Not to mention, PEX is flexible, PVC is rigid. Flexible pipe makes life way easier.
Go to Home Depot, look for a old dude wandering around plumbing. Always find the old dude. Tell him you want to run a small system in PEX crimp fittings, what do you need?