Hi guys, not a plumber by any means, however probably a better than average handyman so I wanted your guys opinions on what it would take, if possible to do what I want plumbing wise... I have a condo that shares water with five other units in the building. Now, I was planning on doing some work inside soon, which may open up all the walls, so my question is, would it be possible for me to add a stop valve for only my units water? Right now the only one is for the whole building, so if I need to turn the water off i have to turn the water off for the whole building, this also limts the ability to install a water softener. Any thoughts or ideas on this would be much welcomed. thanks yall.