FITS STANDARD HOSE SIZES - Compatible with 1 inch (25.4mm) hose I.D., making it suitable for common plumbing setups PREVENTS SIPHONING - Features a simple internal valve system that ensures water cannot siphon over plumbing loops, providing peace of mind DURABLE CONSTRUCTION - Made from corrosion and abrasion-resistant ABS plastic, ensuring long-lasting reliability in marine environments ESSENTIAL SAFETY COMPONENT - Designed for all inlet and discharge plumbing on toilets installed below the waterline to prevent backflow NO EXTERNAL VENTING REQUIRED - The built-in valve eliminates the need for additional external venting, making installation easier and more efficient. FIVE OCEANS, 40 Years developing High-Quality Marine & Outdoor Products FITS STANDARD HOSE SIZES - Compatible with 1 inch (25.4mm) hose I.D., making it suitable for common plumbing setups.

PREVENTS SIPHONING - Features a simple internal valve system that ensures water cannot siphon over plumbing loops, providing peace of mind.

DURABLE CONSTRUCTION - Made from corrosion and abrasion-resistant ABS plastic, ensuring long-lasting reliability in marine environments.

ESSENTIAL SAFETY COMPONENT - Designed for all inlet and discharge plumbing on toilets installed below the waterline to prevent backflow.

NO EXTERNAL VENTING REQUIRED - The built-in valve eliminates the need for additional external venting, making installation easier and more efficient.

PRODUCT NUMBER: FO2421