3″ Exhaust Thru-Hull, White w/Flapper

Replace or upgrade your marine exhaust thru-hull with this 3″ white exhaust thru-hull fitting with flapper (SKU: 383-1200298). Built for wet exhaust applications to help reduce water backflow when the vessel is stopped, moving slowly, or backing down.

Key Features

• 3″ thru-hull exhaust fitting in white finish
• Includes flapper for improved water-backflow resistance
• Designed for marine exhaust applications (wet exhaust use)

Product Compatibility

• Marine wet exhaust systems
• Exhaust thru-hull installations requiring a flapper-style fitting

Product Details

• Title: 3″ Exhaust Thru-Hull, White w/Flapper
• SKU/Part number: 383-1200298
• Manufacturer part number: 1200298
• Inlet size: 3″
• Color: White
• Package quantity: 1 (single fitting)
• Includes: Flapper

Parts Desk Insights

Best Use Case: Use when you need a direct replacement exhaust thru-hull fitting for a 3″ wet exhaust setup, especially where water backflow is a concern when the engine is not under load.

Common Issues: Flapper-thru-hull installations can be sensitive to proper alignment and sealing at the hull opening. If exhaust leaks or water intrusion occurs, re-check mounting/gasket condition and confirm the fitting orientation and hose routing match the original installation.

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