Durable plastic marine check valve engineered to protect your vessel’s drainage and bilge systems. Key benefits Reliable in marine environments: Tough plastic construction resists corrosion and provides long-term service in wet, salty conditions. Prevents backflow and equipment damage: Unidirectional flow only allows water to exit, stopping reverse flow that can harm pumps and plumbing. Leak-proof performance: A robust sealing ring creates a secure seal during drainage to minimize leaks and improve onboard safety. Secure, serviceable connection: Split-body design with tightened screws delivers a tight joint and makes routine inspection or replacement straightforward. What it does Allows fluid to pass in one direction while blocking reverse flow, keeping bilge pumps, thru-hulls, and drain lines protected. Maintains a reliable seal under normal marine drainage conditions to reduce risk of water intrusion. Compatibility and material Constructed from durable plastic suitable for marine bilge and drainage applications. Designed for integration with typical marine drainage and bilge systems; consult hose and fitting sizes to confirm fit. Practical applications Bilge systems: Install on the outlet line of a bilge pump to prevent water from flowing back into the bilge when the pump stops. Deck or cockpit drains: Fit into drain lines to keep standing water from returning into living or storage spaces. Equipment discharge lines: Use on discharge fittings to protect onboard pumps and plumbing from backflow and contamination. Installation and maintenance Split-body interface secured with screws provides a tight connection and eases inspection or replacement of the sealing ring. Periodic visual checks recommended to ensure the sealing ring and fasteners remain in good condition. Why you need it Protects critical onboard systems by preventing backflow and leaks. Simple, robust design reduces maintenance needs and increases confidence in drainage performance.