Product Description

Helix OEM waste tank Vent Filter. Refillable drop-in replacement to the Dometic vent filter bracket for an easy transition, as well as the SaniGard, Yacht Z Marine & Voker filters. Complete with it's own mounting bracket, stainless screws and hose clamps. It is equipped with Dometic garden hose threads, as well as 5/8" and 3/4" hose size caps are included. If you need a larger size please contact us.
Every Nautilus Filter™ is powered by our refillable Five-Chamber Carbon Helix™ (Patent Pending). It is the core technology behind both the PRO and OEM models and the foundation of the Nautilus engineering philosophy.
The Carbon Helix™ was developed to accomplish four primary objectives.
- Increase odor removal performance.
- Extend activated carbon service life.
- Reduce unnecessary waste.
- Lower long-term ownership costs.
- Get your refill here
Each kit includes:
- Nautilus Filter™ assembly
- Heavy-duty mounting bracket
- 316 stainless steel mounting screws
- 316 stainless steel hose clamps
- Precision silicone O-rings
- Integrated silicone reverse-flow bypass valve
- Interchangeable 5/8-inch and 3/4-inch hose barb discs
- 3/4-inch garden hose threaded adapters compatible with many common OEM installations
Additional hose barb sizes are available at no additional charge upon request.
Including these components helps simplify installation while ensuring the installer has the hardware needed to complete the job.
Direct-Fit Performance Upgrade
The OEM model is a perfect fit/direct replacement for common filters manufactured by Dometic, SeaLand, SaniGard, Voker, Yacht Z Marine, Camco, and others using this size format.
The Nautilus Filter™ OEM was developed for boats that utilize this long, narrow holding tank vent filter installed by many boat manufacturers.
Many of these boats have limited installation space that will not accommodate a larger diameter filter. Rather than compromise performance, the Nautilus Filter™ OEM applies the same engineering philosophy used in the PRO model within the dimensional constraints of this common OEM installation envelope.
Powered by our refillable Five-Chamber Carbon Helix™ (Patent Pending), the Nautilus Filter™ OEM delivers over 5× the odor removal performance and service life of conventional disposable OEM-size holding tank vent filters.
Like the PRO model, the OEM incorporates an integrated silicone reverse-flow bypass valve that automatically provides unrestricted airflow back into the holding tank during aggressive pump-outs while maintaining normal odor filtration during everyday operation.
The OEM is fully refillable using the Nautilus Filter™ OEM Carbon Refill Kit, allowing the housing to remain in service while only the activated carbon is replaced.
The result is the highest practical performance available in the industry's most common OEM filter size.
Recommended Applications
The Nautilus Filter™ OEM is recommended when:
- Replacing a conventional OEM-size holding tank vent filter.
- Installation space is limited.
- A direct-fit replacement is preferred.
- The customer wants a refillable upgrade.
- Maximum performance is desired within the OEM installation envelope.




The inventor (Joe) of this new vent filter has built a better mouse trap as the saying goes. In this case its a better smell trap. The issue with existing vent filters is the residence time for the malodor of hydrogen sulfide gas, mercaptans and organic acids from anaerobic bacteria. Traditional filters have a very short residence or time the gases from holding tanks spend in the carbon bed. To make things worse, straight pipe vent filters mounted horizontal end up with compressed carbon and leaving an air gap at the top for the odors to travel quickly past the carbon, making them useless.
A 5 chamber helix for the flow of the gases is the patent pending design; it creates six (6) times the residence over a straight flow filter. The longer the gases are in contact with the blended carbon, the more it absorbs the odor. The helix design solved another problem, if mounted horizontal and when the carbon breaks down leaving an air gap at the top, the flow direction always is going down and back up putting it in contact with the carbon most of the time. It can be mounted vertically too.
Joe didn't stop there; he integrated a umbrella style relieve valve in a tube down the middle of the filter. This is a safety relief for when you are getting your waste tank pumped out. Most of the pump stations have pumps that are so fast, they put a lot of demand on that vent line. Not to impede on that process, it has this bypass tube. I've not seen this in any other filter.
All this great design and there is more; Its refillable ! Refills are sold here - REFILL. Additionally, the caps were designed with self centering threads so they won't cross thread during refill time. Leave the hoses in place and remove the filter by hand. The caps have an integrated silicone seal that will last for many years. The hose barbs were purpose made for vapor, making them very easy to push hose on during install.
Using a proprietary blend of Specialized Activated Carbons specifically targeting gasses (mostly H2S) and odors produced in holding tanks, the Nautilus Vent Filter is the best for odor removal efficiency - and longest lasting performance available!
Get to know the filter!
Easy Installation!!