Indulward 1-1/2" Boat Scupper Drain with Flapper – Thru Hull Self-Bailing Valve, Anti-Backflow Design, Fits 1.8" Cutout, 316 Stainless Trim, Easy Install for Boats & Yachts (1 Pack)

["Anti-Backflow Scupper Valve:Built-in rubber flapper opens quickly to drain water and closes tightly to stop seawater from flowing back into the cockpit, keeping decks dry even in rough conditions.","Secure & Leak-Free Fit:Precision-molded body with 316 stainless steel trim ensures a tight seal on hull thickness under 1.8”, reducing vibration, leaks, and long-term wear.","5-Minute DIY Installation:No screws or special tools required. Simply drill a 2.2” hole, insert the scupper, and secure with a hose clamp — perfect for quick replacements and DIY boat maintenance.","Wide Application for Boats:Ideal for transoms, cockpits, and bilge drain outlets on fishing boats, pontoon boats, yachts, and small cruisers.","Check Size Before Purchase:Designed for standard 1-1/2” marine hoses and hull thickness under 1.8”. Please measure your hull and hose size before ordering to ensure proper fit."]