I remember reading something about corrosion when connecting certain types of metals together. I would like to avoid this of course.

Can someone fill me in on the metals combinations that I should avoid when replacing my piping? I have Brass (tee and union) and bronze (check valve) and Flex-con WWT-20 tank. I will need to add a few pieces and will be connecting to CPVC.

Thank you for a fantastic site, which has provided lots of info so far.