Hey this is the first time I have had to deal with a slab. Its a well system and the hook ups are in the middle of the house. Now I have done many hook ups to well systems and hook up after the pressure tank and before the water treatment tank. No problem there. My question is can I hook up before the pressure tank some where under ground to the line coming off the well? And if so do I need to do anything like adding a pressure switch or relay. I was going to add a master valve and a blowout attachment just after the connection to be on the safe side.