The Hide A Hose Valve Rough-in Kit is the required mounting plate for all of the New HS5000 Hide-A-Hose Style Trim Kits. These Rough-in kits in conjunction with the new HS5000 Trim kit will allow for a maximum wall thickness of 1 ½” and fit within a normal 2×4” wall. To prevent the rapid flex hose from stretching and getting stuck in a standard fitting, install a reducer in the pipe run a few feet past the length of the hose.