TruDesign Holding Tank Carbon Filter

Combat onboard odours with the TruDesign Holding Tank Carbon Filter—a high-performance add-on for your holding tank vent line. Designed to absorb gun-worthy smells from decomposing sewage using activated carbon, it’s perfect for boats, RVs, or off-grid marine environments. Install vertically in your vent setup and enjoy cleaner air above deck, while maintaining good tank ventilation for aerobic decomposition 

Constructed to simplify maintenance, the filter includes saddle-mounted or bulkhead screw options and a transparent base to inspect for liquid bypass. With a dual-tail fitting, it accommodates both 19 mm and 25 mm hose sizes for a neat installation.

Key Features:

• Active carbon media to remove holding tank odours efficiently 

• Dual-tail hose fittings—fits 19 mm & 25 mm hoses 

• Clear base lets you check for liquid intrusion promptly 

• Mounts via saddles or screws for bulkhead fits 

• Designed to be installed vertically, minimum 45° if angled 

• Annual cartridge replacement recommended for peak performance

Ensure fresh air and peaceful cruising—even in the most challenging marine environments.