Marine Stainless Steel Deck Drain Scupper – Mirror-Polished Thru Hull Fitting (3/4” / 1” / 1-1/8” / 1-1/2”)

Key Benefits

• Mirror-polished stainless steel cap – Resists rust, tarnish, and UV degradation. Looks factory-fitted and stays looking new season after season.
• Streamlined low-profile design – The smooth, flush-mount cap minimizes drag and won’t snag lines, gear, or crew. Ideal for performance and cruising vessels alike.
• ABS body – corrosion-proof & non-yellowing – Marine-grade ABS withstands saltwater, fuel, and UV exposure without cracking or discoloring.
• Optional built-in check valve – Prevents backflow of seawater into the hull — a critical safety feature for below-waterline installations and rough-water conditions.
• Multiple sizes available – 3/4”, 1”, 1-1/8”, and 1-1/2” to match your existing hose and hull requirements.
• Black & White finish options – Match your hull or deck color for a seamless, professional appearance.

Solves These Common Problems

• ❌ Plastic caps that yellow and crack after one season → ✅ Stainless steel cap stays pristine year-round
• ❌ Seawater backflow through drain lines → ✅ Check valve variants prevent reverse flow
• ❌ Fittings that stick out and create drag → ✅ Streamlined flush-mount profile
• ❌ Mismatched hose sizes → ✅ Four sizes cover 3/4” to 1-1/2” hose connections

Applications

Suitable for yachts, motorboats, sailboats, fishing vessels, pontoon boats, and dock installations. Ideal for cockpit drains, transom outlets, bilge discharge lines, and aeration pump connections.

Material: Stainless Steel cap + Marine ABS body | Note: Measurements may vary ±1mm. Recommend marine sealant on installation. Verify hose inner diameter before ordering.

Size: 3/4"• Cap Diameter: 50mm (5cm)• Total Height: 74mm• Hose Barb OD: 18mm• Weight: 47g

Size: 1"• Cap Diameter: 61mm• Total Height: 85mm• Hose Barb OD: 24mm• Weight: 77g

Size: 1-1/2"• Cap Diameter: 74mm• Total Height: 92mm• Hose Barb OD: 36mm• Weight: 120g