I had a plumber come out the other day to do some work and I offered up some spare PVC that I had leftover from various projects and he told me that it was schedule so-and-so and wouldn't be appropriate/durable for the task I had in mind.
I had never even paid attention to the fact that PVC pipes came in different "Flavors" or schedules and always just grabbed whatever I came upon first that was the right size. Kinda scary thinking about all the DIY projects I have used it on.
So can someone give me a brief summary of the different schedules of PVC pipes available and what each one should be used for?
Best Answer
The schedule is the wall thickness of the pipe (essentially how much pressure it can withstand). Wikipedia has a Nominal Pipe Size Table (and the article goes into the description of the size and the why behind them).
From this article http://www.ehow.com/facts_5575151_difference-between-schedule-schedule-pipe.html:
In my house the line that runs out to my irrigation system and the sewer pipe are all schedule 40 (the schedule is usually printed on the pipe).