My new wall mount vanity has little space for the drain/trap and water shut offs. The vanity has two drawers with only 1 1/2" between the back of drawers and the wall. there is a space (basically a "slot" running vertically down the inside of the cabinet) built into the centre of the drawers for the drain and trap to sit in that is only 3 3/4" wide. this seems narrow to fit the two shut-offs and the drain/trap into? - the existing shut offs, are 2 1/2" "long", assuming they are "standard", a shutoff won't fit between the drawers and the wall, even if shutoffs are installed tight to the wall. Am I missing something here, or are there low profile shut-offs that only approx 1" deep to fit behind the drawers? Do you think there meant to be recessed into the wall with an access panel or something ?