【Widely Applicable】Designed for use on engine wellhead tubing from 1-1/4-inch pipe to 1-1/8-inch, this max ball scupper features a universal fit that seamlessly accommodates various hole patterns and is compatible with motorwell tubes. flowmax scupper greatly reduces water buildup on decks and can meet the needs of fishing, boating and water sports enthusiasts worldwide.

【Efficient Self-Draining】Boat self bailing ball scupper valve have the advantages of automatic drainage as well as high drainage capacity. As water builds up inside the boat, the water pressure causes the valve to open, allowing the water to flow out of the boat's drain. Marine boat scupper have larger exit holes, providing 70% more drainage than other boat drains.

【Anti-Reflux Design】The boat scupper drain valve self-bailing ball is mounted on the transom above the waterline and the ball moves to drain water from the deck. When waves hit the deck or the ship rolls over, the marine ball scupper valve automatically seals the hole to prevent water/debris from entering the ship through the drain hole.

【One-Way Valve Mechanism】The boat floor drain with ball utilizes a neutral buoyant ball that maintains a good seal and ensures efficient drainage without backflow. Standing water on the deck can flow out of the drain hole through the one-way valve, preventing water from flowing back into the drain, thus keeping the cockpit and deck dry.

【Easy to Install】The self drain scupper plugs feature multiple mounting openings, making installation or retrofitting quick and easy, with no need to fill holes or re-drill. The unique design of the boat drain plug ball exhaust port allows for easy cleanup of excess debris and routine maintenance by simply rinsing with clean water.