Enhanced safety: Prevents water backup through drain holes on boats, keeping interiors dry. Suitable for RVs and yachts. Dependable and sturdy: Thickened ABS construction resists wear and deformation for longlasting use. Easy to use and maintain: Designed for marine environments, compatible with saltwater and freshwater; easy to install and maintain for reliable performance in all conditions. Weatherproof performance: Built to withstand harsh conditions with strong drainage capacity, efficiently removing excess water from deck or cockpit bilge. Use scenarios After heavy rain, spray, or washdowns, the valve prevents water from backing up into cabins or compartments, keeping the boat dry. On small to midsize boats with deck or cockpit drains, it helps maintain a dry bilge by ensuring proper drainage and preventing backflow. In saltwater or mixedwater marinas, or during rough seas, the valve provides reliable drainage to maintain dryness and reduce moisture inside the vessel. Material and compatibility notes Made from thickened ABS for durability and resistance to deformation. Suitable for marine environments, compatible with saltwater and freshwater applications on boats, RVs, and yachts. Easy to install and maintain, designed to perform reliably in varied conditions.