Yes, there are various types of PVC, each identified with a specification identification. Further, markings are required:
"Product marking shall meet the requirements of ASTM D1785 and ASTM D2665 as applicable and shall include: the manufacturer’s name (or the manufacturer’s trademark when privately labeled); the nominal pipe size; the material designation code; the pipe schedule and pressure rating in psi for water
@ 73°F; the ASTM designation D1785; the ASTM designation D2665 (when dual marked); the independent laboratory’s seal of approval for potable water
usage; and the date and time of manufacture."
OK, enough for PVC. Now potable water lines.... for the last two seasons I intended to rip out the junk that exists in my boat. I intend to replace it with PEX using both PEX pipe and tubing. Some places tubing will be easier and other places pipe will be easier to install. I have all the needed fittings along with the crimp tool.