Switch to a vented cap when you park your RV for the winter to let your waste tank breathe. Unlike a solid cap that traps moisture and odours, this vented version lets air flow through, keeping your tanks dry and preventing freeze damage. The bayonet fitting twists onto your standard 3-inch waste valve and stays put. A simple swap that makes seasonal storage cleaner and safer.

• Vented bayonet cap, 3-inch diameter
• Black plastic with ventilation ports
• Keeps waste tank dry during storage
• Prevents odours and freeze damage