Attwood hull-mounted vents are designed to install by fastening as a complete unit from either inside or outside the hull. Ventilation hose (not included) twists into the bottom of the box to form a raised water barrier. Plastic vents are corrosion-resistant, will not discolor. All collector boxes and vents are designed for intake or exhaust and meet ABYC H-2 cross sectional area requirements.
Clean, contemporary, louver design
Corrosion-resistant, paintable ABS plastic
For 3″ or 4″ I.D. ventilation system
Requires 1341 collector box for 3″ system, or 1342 for 4″ system
Sized for all installation even on highly contoured decks