A couple of years ago, I did an experimetnt for the Oregon Association of Home Inspectors. I made up about 24 fittings using combinations of ABS and PVC pipe glued to each other with every combination of correct and incorrect cement products that I could find. I then sawed each connection in half to examine the finished joints. Some looked better than others but they were all strong joints.
At the next meeting, I passed out the pieces to the membership along with hammers, pliers and vice grips and invited them to destroy the connections. I wanted to see which fittings failed and how they failed.
By the end of the evening, not a single joint failed. They all broke at the point where the pipe met the fitting, but the cemented surfaces remained glued to each other in every case. This included PVC glued to PVC with ABS cement and vice versa.
- Jim Katen, Oregon