Dometic / SeaLand ECO Holding-Tank Odor Vent Filter Kit | 309311004 / SLD-311004
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Dometic / SeaLand ECO Holding-Tank Vent Filter Kit
309311004 / 311004 is an odor-filter kit for the vent hose of a marine waste holding tank. Activated filter media reduces odors released through the tank vent. This is a sanitation-system component, not an air-conditioning grille or cabin-air filter.
Kit Contents and Connections
- Vent-filter cartridge, mounting bracket, hardware, and hose adapters.
- Adapter sizes: 5/8 inch, 3/4 inch, 1 inch, and 1-1/2 inches hose inside diameter.
- SeaLand reference: 309311004 / 311004. Dometic DVF reference: 9108849515.
Parts Desk Insight
The listed sizes describe holding-tank vent hoses, not ventilation ducts. Measure the existing hose inside diameter and check space for the filter and bracket before ordering.
Installation and Care
Mount above the holding tank and away from heat sources, following the Dometic instructions. Do not use with waste systems containing chlorine or other strong oxidizing agents. Replace the filter immediately after a tank overflow. The manufacturer recommends a fresh filter at the start of each boating season for best odor control.
Dometic Product Sheet Installation and Operating Instructions
Shipping information
In-stock and OEM parts: ship same or next business day.
Available items are ready for pickup or shipping between one and three 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.