SeaDog Exhaust Thru Hull | Cast 316 Stainless | Includes Stainless Flap with Rubber Seal
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Provide a reliable exhaust thru-hull connection with a stainless flap and rubber seal designed to help keep water from backflowing through the exhaust opening.
Key Features
- Cast 316 stainless steel construction
- Includes stainless flap with rubber seal
- Exhaust thru-hull fitting for marine hose routing
Product Compatibility
- Marine exhaust systems using a hose connection
Product Details
- Sea-Dog Line exhaust thru-hull fitting
- Part number/SKU: 354-521130
- Material: Cast 316 stainless steel
- Includes: Stainless flap with rubber seal
- Hose fitting size: 3 in
- Overall length: 5-7/8 in
- Weight: 1009 g (1.009 kg)
Parts Desk Insights
Best Use Case: Ideal for replacing an exhaust thru-hull fitting when you need a durable, 316 stainless flap design with an integrated rubber seal to help minimize backflow.
Common Issues: If the rubber seal hardens, degrades, or fails to sit flat, backflow and exhaust odor/water intrusion can occur. During service, verify mating surfaces are clean and confirm the seal seats evenly when the flap is closed; also confirm correct hose size (3 in) and secure hose clamp placement.
Related Products & Accessories
- Related exhaust system parts & accessories - Browse the Mufflers/Exhaust and Hose/Mufflers/Exhaust categories to find matching hoses, clamps, and related exhaust components.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.