How to Add a Drain to Existing Plumbing Safely & Legally

Need to add a sink, shower, or laundry hook-up—but your current plumbing doesn’t have a nearby drain? You’re not alone. Thousands of U.S. homeowners face this challenge every year when remodeling basements, adding bathrooms, or upgrading kitchens. The good news: how to add a drain to existing plumbing is doable—even for confident DIYers—with the right…