Vented 4inch Square RV Sewer Cap designed for secure, dry storage of sewer hoses and accessories Keep sewer hoses and related accessories stored inside the RV bumper without trapping moisture or odors. This cap combines airflow vents with a reliable locking screw so the cap stays put on rough roads and helps prevent mold, corrosion, and unpleasant smells. Key benefits Vented design promotes continuous airflow to reduce moisture and odor buildup, helping keep the storage area clean and dry. Secure locking screw resists loosening during travel, preventing cap shifts, drops, or lost covers on bumpy roads. Easy, tool light installation: slide the cap onto the standard 4inch square bumper opening, tighten the screw, and lock it into place. Fits standard 4inch square camper and RV bumper openings for direct compatibility with common RV sewer storage setups. Designed to hold sewer hoses and accessories inside the bumper opening to avoid exposure and loss while traveling or stored. What it does for you Maintains a drier storage compartment by allowing air circulation around stored items. Keeps hose ends and fittings safely contained and protected from road debris. Reduces time and effort during installation and removal with a straightforward slide on and tighten procedure. Typical uses Securing sewer hoses and fittings inside a 4inch square bumper opening during highway travel. Preventing moisture accumulation and odor in bumper storage while parked at a campground or in long term storage. Storing replacement fittings, caps, or small accessories inside the bumper for organized, out of sight storage. Features at a glance Compatibility: standard 4inch square RV and camper bumper openings Function: vented airflow, secure locking screw, internal storage cover Performance: resists loosening on rough roads to prevent loss or damage Simple to install, reliable in use, and focused on keeping your sewer hose storage clean, ventilated, and secure.