Sea-Dog Round Louvered Vent, 5 Inch Stainless Steel, Part 331425-1

The Sea-Dog 331425-1 is a 5 inch round louvered vent designed to let air circulate through a boat's hull, engine compartment, or storage area while keeping water out. The louvered blade pattern deflects rain and spray away from the opening, making it a practical choice for ventilating enclosed spaces that need airflow without exposing the interior to the elements.

It is stamped from corrosion resistant 304 stainless steel, giving it long-term durability in a marine environment where fresh water, salt spray, and UV exposure quickly degrade lesser materials. The vent has a net vent area of 2.02 square inches, allowing meaningful airflow through a relatively compact opening. It installs with four #6 flat head fasteners (not included), and requires a mounting hole of 3-1/2 inches to accept the vent body.

This is a hardware-only vent with no moving parts, making it a simple, low-maintenance option anywhere a fixed, weather-resistant air vent is needed on a boat, deck box, console, or hatch.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 331425-1
• Product Type: Round Louvered Vent
• Material: 304 Stainless Steel
• Construction: Stamped
• Overall Size: 5 inches
• Mounting Hole Size: 3-1/2 inches
• Outer Diameter: 4-1/2 inches
• Vent Area: 2.02 square inches
• Fastener Type: #6 flat head (fasteners not included)
• Weight: 0.148 pounds
• UPC: 035514331128

Fitment

This is a universal round louvered vent; it is not model-specific and fits any application with a matching 3-1/2 inch mounting hole.

Frequently Asked Questions

What size mounting hole does the Sea-Dog 331425-1 vent require? The Sea-Dog 331425-1 round louvered vent requires a 3-1/2 inch mounting hole to accept the vent body.

What is the overall diameter of this vent? The overall size of the 331425-1 louvered vent is 5 inches, with an outer diameter of 4-1/2 inches at the flange.

What material is the 331425-1 vent made from? It is stamped from corrosion resistant 304 stainless steel, which resists rust and pitting in marine environments.

Does the Sea-Dog 331425-1 vent come with mounting fasteners? No, fasteners are not included. The vent installs with four #6 flat head screws that must be purchased separately.

How much airflow does this vent provide? The 331425-1 has a net vent area of 2.02 square inches, sized for a 5 inch round vent.

How much does the Sea-Dog 331425-1 vent weigh? This vent weighs 0.148 pounds.

Is this vent adjustable or does it have a fixed opening? The 331425-1 is a fixed louvered vent with no moving parts or adjustable knob; airflow passes through the stationary louvered blades.

What is the UPC for the Sea-Dog 331425-1 vent? The UPC for this 5 inch round louvered vent is 035514331128.

Can this vent be used below the waterline or in high-spray areas? The louvered design of the 331425-1 is built to let air in while deflecting rain and spray away from the opening, making it suitable for above-waterline ventilation applications such as engine compartments, hatches, and storage areas.

Is there a smaller version of this vent available? Yes, Sea-Dog also makes a 4 inch round louvered vent (part 331424-1) with a smaller 0.88 square inch vent area, as a separate part number from the 5 inch 331425-1.

How is the 331425-1 different from Sea-Dog's butterfly vents? The 331425-1 is a fixed round louvered vent, while Sea-Dog's butterfly vents use a hinged, adjustable panel with a center or side knob to control the opening; the louvered vent has no adjustable parts.