What is food grade and what is not food grade

[not_for_sale]

I noticed today that some of the schedule 40 pvc pipe at lowes states drinking water and has an NSF stamp. Anything over 1 inch doesn't have that designation or stamp on it.

In fact the other stuff has "vent & waste on it.

So - is pvc schedule 40 pipe food grade or not. The material looks and smells exactly the same.

[happy thoughts]

Looks can be deceiving. The only way to know for sure is to call the manufacturer. I wouldn't necessarily trust what the floor help tells you.