G'day, New to the forum and new to plumbing. I am trying to hook up an outdoor sink that has white drain pipes--not quite PVC--that will be connected to ABS that then has to be tied into another ABS pipe. Do I need primer AND ABS cement for the white pipe to ABS? And how about primer for the ABS to ABS? Or can I just use ABS cement for both of these connections? thanks so much.