I just got done with the rough plumbing here at my addition. I have been spending hours and days for the past few years watching plumbing videos, reading books and researching plumbing. I consulted with a licensed plumber before I began. He gave me a good idea on the DWV sizing and routing and water supply system. I used ABS on the DWV system since it is what I am familiar with. I spent extra money and went with the PEX expansion ring system. I bought the Milwaukee expander and I love the system.
I had the same plumber out after I finished the project and he said I should be proud of my work. There were a few things he saw that I recommended I fix but nothing too major. What would have taken a real plumber 3 days took me about 3 months. I was working on it off and on after work and on weekends. I just went slow and thought everything out. I had didn't run into many problems having to re-do my work. I really enjoyed doing the rough pluming in my addition. It passed the pressure test and I am glad I spent extra money on the expansion ring system.