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Introducing our Clamshell Vent, a modern and robust ventilation solution for your boat. Crafted from cast 316L stainless steel, these vents are built to last. The vent consists of two pieces: a top and a bottom. The top piece is attached by sliding it across the base and securing it with a screw on the inside back end of the lid, connecting the top and base together. This clever design eliminates visible screw fasteners on the exterior, ensuring a clean and elegant appearance.  The base features a 3" or 4" hose adapter, allowing it to securely attach to the deck and pass through the cutout. You can then connect a hose from the bottom side of the deck, enabling you to displace air to any desired area on the boat. Originally designed as a replacement for Catalina Yachts' transom clamshell vent, this vent offers both functionality and style.  For more information or to place an order over the phone, please feel free to contact us.



Cutout 3"

Height Above Deck 2-1/2"

Overall Width 4-1/4"

Overall Length 4-3/4"



Cutout 4"

Height Above Deck 3-1/2"

Overall Width 5-1/4"

Overall Length 5-3/4"

Clamshell Vent

SKU: 531
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