Truthfully when I started working with my father as a kid in none of these options were available. We connected faucets and toilets with 1/2″ brass pipe which was reduced to 3/8″ pipe or 1/4″ threaded brass tailpieces depending on what you were hooking up. When the chrome plated basin supply tubes came onto the scene it made life so much easier and they looked pretty good too. Now we have many of options and with the exception of the p.e.x. connector (don’t like them) connecting faucets and toilets is a breeze.