I read in a publication (Family Handyman, June 2020, page 53 that PVC pipe is not code compliant for indoor water supply lines. Is this new? I certainly have been in a lot of homes over the years where the pipe was installed by a licensed plumber and a mixture of CPVC and PVC was used.

I am planning on finishing my basement. I was going to take advantage of the roughed in bathroom (sink, toilet and bathtub pipes coming up through slab) but wondering how the plumbing actually works. The main waste line seems to exist the basement chest high. How does the waste from the roughed in basement bathroom make it up to chest high. I have attached a picture. The 2.5in line at the top of the picture was originally about 3 feet longer and capped. I cut it off and capped it to get it out of the way. It did not extend down to the sump in the floor. There is another capped off line that connects to the main waste line leaving the home atabout the same location. The bath tub rough in is at the bottom left of the picture and the toilet and sink drain pipes are off the left of the picture. Do the 3 roughed in drains go to the sump? and then should be piped to the main drain line some how? Why would the over to the sump be taped off and line disconnected? Perhaps because the basement had never been finished? Curious to learn. Perhaps there is a ready webiste reference I could tap into?