【Widely Applicable】Self bailing scuppers for boats can be used to replace old 3/4-inch to 1-1/2-inch open-end drains with a universal fit that seamlessly adapts to a variety of hole patterns and is compatible with most boat models. Applying the self-bailing 2-7/8 in. scupper valve kit greatly reduces water buildup on decks and can meet the needs of fishing, boating and water sports enthusiasts worldwide.

【Efficient Self-Draining】boat scupper drain valve self-bailing ball 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.Boat deck scuppers have larger exit holes, providing 70% more drainage than other boat drains.

【Anti-Reflux Design】The boat self-bailing ball scupper valve 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.

【Easy to install】 Boat water drain valve have multiple mounting openings for quick and easy installation or retrofitting. Marine adhesive is recommended to aid in sealing the installation, eliminating the need to fill or re-drill holes. Package includes: 1 x boat drain plug ball along with a small screw (no other mounting screw hardware is included)

【Premium Quality】Ball scuppers for boats is made of high quality, include solid polyethylene ball, clear polycarbonate housing, pvc seal, not easy to deform, exalent sealing properties.