Thru Hull Fitting 15 Pcs Drain Valve for Boat Floor Thru Hull Fitting Leakproof Yacht Overflow Tube Scupper Flapper Durable Efficient Water for Marine Boats Drain Pipe Yacht

General Installation and Sizing Tip: Before installation, verify hull thickness and drill the appropriate diameter hole using a hole saw. Apply marine-grade sealant around the flange surface and insertion area. Insert from outside and secure with backing nut from inside, tightening evenly. Allow sealant to cure fully before launching. Periodically inspect for leaks or damage, especially after haul-out.Specification:Color: as pictureMaterial: PlasticSize : as picturePackage Includes : 15 pcs Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2mm measuring deviation due to manual measuremeny duty : screen door closer replacement

• Precision-Machined Through-Hull Design: The cylindrical body creates a smooth, unobstructed passage through boat hulls, decks, or bulkheads, allowing liquids or air to pass efficiently while maintaining structural integrity at the penetration point
• Corrosion-Resistant Material Construction: Fabricated from materials specifically selected for marine environments, each fitting withstands continuous exposure to saltwater, spray, and humidity without degrading, rusting, or compromising the seal
• Flanged Mounting Surface for Secure Installation: An integrated flange at the base provides a stable mounting surface that distributes clamping forces evenly, ensuring the fitting remains firmly seated against the hull during operation
• Standard Hose Barb Connection Interface: The stepped barbed end accepts flexible hose of matching internal diameter, creating a mechanical grip that resists pull-off forces from water pressure or vessel movement without requiring clamps in low-pressure applications
• Low-Profile External Projection: The streamlined exterior portion minimizes drag and snagging hazards when installed on hull bottoms or transoms, maintaining the vessel's hydrodynamic profile while providing necessary drainage or ventilation