Layout information from the wall is transferred to vanity’s back panel, but in the opposite direction. Vertical centerlines of pipes are located by measuring from the reference, or benchmark, centerline. Horizontal centerlines are located by measuring from the cabinet height line.

Confronted with the task of installing a sink or vanity cabinet, you may be tempted to speedily hack out a window in the cabinet’s back to accommodate roughed-in plumbing protruding from the drywall, then slide it home. But I’m of a mind that the interior appearance of a cabinet matters almost as much as the exterior, therefore I take the time to accurately align cabinet cut-outs with the roughed-in piping. In this article, I will describe the simple method I use to accomplish a precise alignment.

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