handling of salt water

[skimmers]

Hi to all,
I am trying to figure out a way to handle salt water without affecting my house. My wife and i worry about if we flush saltwater to sink or toilet bowl when we change water, it will ruin or (eat-in) our piping etc... Anyone have any issue with it, any suggestions on how to handle it. Especially, how to prevent it before rusting happen. I know that a friend of mine drain waste water to their sump pump but I thought it will rust the pump too, is it true.

We don't have a salt water tank right now even I have been browsing this site for awhile (and really want to have one). Since this is a hurdle we need to get through before we decide to start one. Any ideas or experience do help, please. What kind of long term effect are we going to expect? Will there be any smell?

thanks,

Ted .