Marine Thru-Hull Drain Tube

Key Features

• Thickened PP Material – High-density polypropylene; impact-resistant, anti-oxidation, and corrosion-resistant for long-term saltwater use
• Anti-Aging – UV-stable PP construction resists cracking and degradation in harsh marine environments
• 360° Flange Nut Lock – Threaded flange nut rotates a full 360° for easy tightening from inside the hull; secure, leak-free fit
• Two Sizes Available – 3/4" (18mm inner bore) and 1-1/4" (27mm inner bore); fits standard boat hull drain holes
• Two Colors – White and Black; matches your deck or hull finish
• Wide Application – Fits yacht, baitwell, livewell, motorwell, and general hull drainage

Problems Solved

• Prevents water accumulation that causes vessel imbalance and handling issues
• Replaces rusted metal or cracked plastic drain fittings that leak or seize
• Eliminates difficult installation — 360° flange nut tightens from inside without special tools
• Stops UV degradation failures common with low-grade plastic fittings

Name: Marine Thru-Hull Drain Tube
Material: Thickened PP (Polypropylene)
Colors: White / Black

Size 3/4"
Outer Diameter (flange): φ32mm (1.26")
Outer Diameter (tube top): φ32.5mm (1.28")
Inner Bore: φ18mm (0.71")
Total Height: 70mm (2.76")
Tube Length: 67.5mm (2.66")
Flange Width: 16mm (0.63") | Tube section: 24.5mm (0.97") | Nut section: 13.5mm (0.53")

Size 1-1/4"
Outer Diameter (flange): φ37mm (1.46")
Outer Diameter (tube top): φ39mm (1.54")
Inner Bore: φ27mm (1.06") / φ28.5mm (1.12")
Total Height: 81mm (3.19")
Tube Length: 71mm (2.8")
Flange section: 50mm (1.97") | Body: 47.4mm (1.87") | Top: 30.5mm (1.2")

Application: Yacht, Baitwell, Livewell, Motorwell, Boat hull drainage