I am having to redo my plumbing from galvanized and installing copper. With this redo, I am wanting to set the system up for a future water softener installation, meaning I am wanting to place the outside faucets on a seperate run, teed off prior to the softener.
Here in Illinois, they don't want a stub longer than 2 feet to create "stagnent water". Since water in that run could sit for a couple months, should a check valve be installed to isolate it?
This situation I am having isn't much different than a PEX home-run setup, what is done for those systems?