I live in a single story all side brick ranch home in Austin, TX built in 1997. I am planning to put a whole house water filter to the the main water supply line coming into the house from the water meter. Does anyone know where to look for? I have a suspicion that it might be coming in from the concrete slab, if this is true I do not have access to it. I might have to put the water filter at the cold line going into water heater, so only hot water is filtered. But I am surprised how a builder can build a property without giving a direct access to main water line for future enhancements like installing a water softener or a filter. Just wanted to double check if I am missing something here. Is it better to just hire a plumber if I need to dig into the slab for access to water line?
Update: I am planning to dig along the exterior wall where I have the outside garden hose spigot, to look for the water line, if I find it then I will drill through the brick wall and bring the line to connect the filters.