Sea-Dog Collector Box, 3 Inch Hose Connection, Injection Molded Polypropylene Vent Box - 331203

The Sea-Dog 331203 Collector Box is an injection molded polypropylene fitting designed to be used together with a louvered vent to facilitate air intake and exhaust on a boat. It connects to a 3 inch hose, allowing the collector box to route air to or from an engine compartment, bilge, or other enclosed space that needs ventilation. The box provides 12.80 square inches of vent area, giving it solid airflow capacity for its size while keeping a low-profile footprint at 15-1/2 inches long, 2 inches wide, and 4 inches tall.

Constructed of injection molded polypropylene, the 331203 is built to resist corrosion and hold up to a marine environment better than metal alternatives. It is designed for use with the stainless steel Louvered Vents (331200 or 331201) or the injection molded ABS Louvered Vents (337210 or 337211), so it pairs with either a stainless or ABS vent depending on the look and material the installer prefers. It is also interchangeable with Attwood part numbers 1341 and 1342, making it a straightforward swap where those part numbers were originally installed. The 331203 comes as part of a three-piece collector box lineup (331202, 331203, 331204) that share the same overall body dimensions but differ in hose size and whether holes are pre-cut, so buyers should confirm the 3 inch hose size before ordering.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 331203
• Material: Injection molded polypropylene
• Length (A): 15-1/2 inches
• Width (B): 2 inches
• Height (C): 4 inches
• Hose Connection Size: 3 inches
• Vent Area: 12.80 square inches
• Weight: 0.218 pounds
• Standard Pack: 5 each
• UPC: 035514331210
• Category: Ventilation

Replaces (OEM)

• Attwood 1341
• Attwood 1342

Frequently Asked Questions

What hose size does the Sea-Dog 331203 collector box use? The Sea-Dog 331203 connects to a 3 inch hose, which is the hose size stamped into this specific collector box in the Sea-Dog lineup (331202 has no hose fitting and 331204 uses a 4 inch hose).

What vents does the 331203 collector box work with? This collector box is designed to be used with either the stainless steel Sea-Dog Louvered Vents (331200 or 331201) or the injection molded ABS Louvered Vents (337210 or 337211), so it pairs with a stainless or ABS vent.

Is the Sea-Dog 331203 compatible with Attwood parts? Yes, the 331203 is interchangeable with Attwood part numbers 1341 and 1342, so it can be used as a direct replacement where those Attwood collector boxes were installed.

What is the 331203 collector box made of? It is made of injection molded polypropylene, a corrosion-resistant plastic that holds up well in a marine environment compared to metal fittings.

How much vent area does this collector box provide? The Sea-Dog 331203 provides 12.80 square inches of vent area for air intake and exhaust.

What are the overall dimensions of the 331203? The collector box measures 15-1/2 inches long (A), 2 inches wide (B), and 4 inches tall (C).

How much does the Sea-Dog 331203 weigh? This collector box weighs 0.218 pounds.

What is the difference between the 331202, 331203, and 331204 collector boxes? All three share the same 15-1/2 inch by 2 inch by 4 inch body, but 331202 has no hose fitting for custom installations, 331203 has a 3 inch hose connection with 12.80 square inches of vent area, and 331204 has a 4 inch hose connection with 9.10 square inches of vent area.

Does the 331203 collector box come with mounting hardware? The collector box itself is a single injection molded polypropylene piece; it is intended to be paired with a separate louvered vent (331200, 331201, 337210, or 337211), which is sold separately.

How many collector boxes come in a package? The Sea-Dog 331203 has a standard pack of 5 each.

Can the 331203 be used on its own without a louvered vent? No, the 331203 collector box is designed to be used in conjunction with a louvered vent to facilitate air intake and exhaust, not as a standalone vent.