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Step 1 · Gather Information and Tools

Before making any marks, gather all necessary information and tools. The most critical item is the manufacturer's specification sheet for your new vanity and sink. This document contains the precise dimensions needed for a perfect fit. Also, gather a quality tape measure, a level (a 24-inch or 48-inch one works well), and a carpenter's pencil or permanent marker for making clear, visible marks on the wall studs.

Gather Information and Tools - How to Measure Bathroom Plumbing Rough-In Dimensions for a New Vanity - Stesso