Skip to content
Free Shipping on Selected RV & Marine Accessories — Availability Shown at Checkout
Shipping options shown at checkout

Clamshell Vent & Drain Covers

Clamshell covers for ventilation openings, cable outlets and drain fittings. Choose by the intended application and compare the cover dimensions and fixing points.

Small metal clamshell vent cover with a curved hood and three mounting holes.

Stainless Steel Boat Clamshell Vent Cover - Cable Outlet Hood, Size Options

$4.99 - $5.99
$4.99 - $5.99
$4.99 - $5.99
$4.99
in stock

Marine Stainless Steel Clam Shell Vent Cover —Wire Cable Ventilation Hood for Boat Yacht Every boat has cables, hoses, and wires that need to exit ...

View full details
$4.99 - $5.99
$4.99 - $5.99
$4.99 - $5.99
$4.99
ABS Marine Clamshell Vent Cover for Boat Deck & Cabin Air Circulation | Product image 1

ABS Marine Clamshell Vent Cover for Boat Deck & Cabin Air Circulation

$4.90 - $5.90
$4.90 - $5.90
$4.90 - $5.90
$4.90
in stock

Marine Plastic Clam Shell Vent — Built for the Harshest Marine Environments Tired of ventilation covers that crack, fade, or corrode after just one...

View full details
$4.90 - $5.90
$4.90 - $5.90
$4.90 - $5.90
$4.90
Boat Clamshell Drain Outlet Cover — Hull Water Diversion Hood, Size Options | Product image 1

Boat Clamshell Drain Outlet Cover - Hull Water Diversion Hood, Size Options

$9.90 - $13.90
$9.90 - $13.90
$9.90 - $13.90
$9.90
in stock

Boat Clamshell Drain Outlet Cover A clamshell-shaped cover for boat drain outlet installations. Select the size and color combination that matches ...

View full details
$9.90 - $13.90
$9.90 - $13.90
$9.90 - $13.90
$9.90