I have to replace the copper in the basement. I will use CPVC and start with the cold line. I just read the info on the lawsuit about the PB fittings and PB lines. My need is to connect the CPVC to the current copper lines that rise up thru the floors and the line that feeds the hot water heater. The QEST compression fittings would fit nicely. Current info does not indicate the problem still exists and failures in these compression fittings will still occur. Does anyone have any insight? And just what is an acetal fitting?