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  1. What Is a Backflow Preventer? (And Do You Need One?)

    Apr 11, 2025 · A pressure relief valve that automatically drains water if backflow occurs. If pressure builds inside the chamber—indicating backflow—the system releases water through the relief valve …

  2. Backflow Preventers - The Home Depot

    Get free shipping on qualified Backflow Preventers products or Buy Online Pick Up in Store today in the Plumbing Department.

  3. What is a Backflow Valve: Understanding Its Function and Importance …

    A backflow valve, also known as a backwater valve, is installed in water pipes to allow flow in one direction only. Its primary purpose is to prevent contaminated water from flowing back into the clean …

  4. Backflow Valves | McMaster-Carr

    Choose from our selection of backflow valves, including check valves, check valves for harsh chemicals, and more. Same and Next Day Delivery.

  5. Backflow Preventers - Watts

    Plumbing codes mandate that potable water supplies be protected against backflow at all cross-connections. We offer the largest selection of backflow prevention solutions for any application.

  6. Essential Guide to Understanding the Backflow Valve and Its Importance

    Aug 25, 2025 · This comprehensive guide will explore everything you need to know about backflow valves, from their basic operation to installation requirements and maintenance schedules.

  7. Backflow Preventers - Ferguson

    Shop high-quality backflow prevention products engineered to ensure clean, safe water in every system. Shop Backflow Preventers at Ferguson. Find expert-curated Backflow Preventers products from the …

  8. Backflow Preventer - Safe Plumbing Solutions | Lowe's

    This 3/4 inch small diameter double check valve assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or …

  9. 4 Types Of Backflow Preventers And Which One Do You Need

    Dec 23, 2025 · This guide will provide a comprehensive overview of the different types of backflow preventers, thei benefits, and how to install and maintain them.

  10. Backflow Preventers & Valves - SupplyHouse.com

    Backwater Valves are used to prevent water or sewage backup into a building as a result of inadequate drainage. These valves ensure a unidirectional flow to prevent backups to homes, businesses, and …