Sea-Dog Flush Thru Vent 337590-1, 316 Stainless Steel, Fits Up to 3 Inch Hose

The Sea-Dog Flush Thru Vent (337590-1) is a through-hull ventilation fitting designed for cabin or bilge ventilation aboard a boat. It is built for use with 3 inch exhaust hose, allowing it to move air efficiently through the hull or bulkhead to help keep enclosed spaces dry and free of trapped moisture or fumes. The vent is constructed from investment cast 316 stainless steel, a corrosion resistant marine grade alloy chosen for its ability to withstand prolonged exposure to saltwater and marine air without rusting or pitting. Investment casting produces a dense, precisely formed part with a clean finish that holds up to years of outdoor exposure.

Installation is straightforward: the vent mounts with four #8 flat head fasteners (not included), so it can be fitted flush against the mounting surface for a low profile, finished appearance. The vent opening provides 3.04 square inches of open vent area, giving adequate airflow for its size. This is a compact fitting with an overall footprint of 2-7/8 inches by 2-7/8 inches and a 3-7/8 inch overall dimension, making it suitable for tight mounting locations where a low-profile ventilation point is needed.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 337590-1
• Product Type: Flush Thru Vent
• Material: Investment Cast 316 Stainless Steel
• Dimension A: 2-7/8 inches
• Dimension B: 2-7/8 inches
• Overall Dimension C: 3-7/8 inches
• Dimension D: 5/16 inch
• Hose/Hole Size: Up to 3 inches
• Vent Area: 3.04 square inches
• Fastener: #8 flat head (not included)
• Weight: 0.46 pounds
• Standard Pack: 1 each
• UPC: 035514338387

Frequently Asked Questions

What is the Sea-Dog 337590-1 used for? The Sea-Dog 337590-1 is a Flush Thru Vent used for cabin or bilge ventilation, allowing air to pass through a hull or bulkhead surface.

What size hose does this vent work with? This vent is designed for use with 3 inch exhaust hose, per its Hose/Hole Size rating of up to 3 inches.

What material is the 337590-1 vent made of? It is made of investment cast 316 stainless steel, a corrosion resistant alloy suited to marine environments.

Is the Sea-Dog Flush Thru Vent corrosion resistant? Yes, the 316 stainless steel construction of the 337590-1 resists corrosion from saltwater and marine air exposure.

What are the overall dimensions of the 337590-1 vent? The vent measures 2-7/8 inches by 2-7/8 inches, with a 3-7/8 inch overall dimension and a 5/16 inch dimension at D.

How much does the Sea-Dog 337590-1 weigh? The 337590-1 Flush Thru Vent weighs 0.46 pounds.

What is the vent area of this fitting? The 337590-1 provides 3.04 square inches of vent area.

Do fasteners come with the Sea-Dog Flush Thru Vent? No, fasteners are not included; the vent installs with four #8 flat head fasteners that must be purchased separately.

How is the 337590-1 vent installed? It installs with four #8 flat head fasteners, mounting flush against the surface for a low-profile finish.

How many #8 flat head fasteners are needed to install this vent? Four #8 flat head fasteners are required to install the Sea-Dog 337590-1 Flush Thru Vent.

Is this vent sold individually or in a pack? The Sea-Dog 337590-1 has a standard pack quantity of 1 each.