Laundry Room Sink Leak Around Drain: How to Fix a Leak Around Your Laundry Room Sink DrainSarah ThompsonJan 16, 2026Table of ContentsTips 1FAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeDiscovering a leak around your laundry room sink drain can be both frustrating and worrisome. The constant presence of water can damage cabinetry, walls, and even flooring if not addressed promptly. Usually, leaks around a laundry sink drain are caused by worn gaskets, loose fittings, corroded pipes, or improper installation. If you notice water pooling underneath the sink or signs of moisture like mildew and warped surfaces, taking quick action is crucial.Start by emptying the cabinet beneath the sink and using a flashlight to pinpoint the source of the moisture. If the seal or washer between the sink basin and the drain is deteriorated or missing, water can escape every time the sink is in use. Similarly, if the plumbing connections have become loose over time, a simple tightening with a wrench might solve the issue. In other instances, you may need to replace old gaskets with new, properly sized ones, or even swap out corroded drain components entirely.From a design perspective, I always recommend choosing quality plumbing fixtures and designing the layout to ensure easy access for maintenance. When selecting materials, moisture-resistant cabinetry and water-impervious panels protect your laundry room for years to come, even if a minor leak goes unnoticed for a short while. Consider planning the sink area so you can easily reach shut-off valves and inspect connections regularly. If you’re redesigning your laundry setup, leveraging a smart room planning tool helps you visualize utility spaces more efficiently, ensuring both functionality and aesthetics go hand in hand.Tips 1:Always use plumber's putty or high-quality silicone around the flange when reinstalling a sink drain to ensure a watertight seal. Regularly check under your laundry sink for signs of moisture or mold as part of your home maintenance routine.FAQQ: What causes a laundry room sink to leak around the drain? A: Common causes include failing drain gaskets, loose fittings, worn-out plumber’s putty, and corroded drain pipes.Q: How can I fix a leak around my laundry sink drain? A: Tighten fittings, replace damaged gaskets or seals, and, if necessary, reinstall the drain assembly using plumber's putty or silicone.Q: Is it safe to use my laundry sink if it’s leaking around the drain? A: It's best to avoid using it until the leak is repaired to prevent water damage to cabinetry and flooring.Q: Can I fix a sink drain leak myself, or do I need a plumber? A: Many minor leaks can be fixed by homeowners with basic tools, but call a plumber if you’re unsure or if the leak persists.Q: How can I prevent future leaks in my laundry room sink? A: Use moisture-resistant materials in your laundry area, ensure fittings are tightened periodically, and inspect under the sink regularly for early signs of leaks.Home Design for FreePlease check with customer service before testing new feature.