Way Non Check Valve — Aluminium, 6mm (also available in 8/10/12mm) A compact, reliable oneway valve designed for inline hose applications in marine and automotive systems. The valve prevents backflow in fuel, water, gas, air and vacuum lines, protecting pumps, engines and tanks from reverse flow and contamination. Key benefits Prevents reverse flow: Oneway check action keeps fluids and gases flowing in the intended direction, avoiding backflow that can damage systems or create unsafe conditions. Broad compatibility: Suitable for fuel, petrol, water, air, gas and vacuum applications commonly found in marine and automotive environments. Durable material: Aluminium body offers a lightweight, corrosionresistant solution that holds up in wet and exposed locations. Simple fit for common hose sizes: Part of a 4size range (6, 8, 10, 12 mm). This listing is the 6 mm size, suitable for 6 mm hose installations. Features and attributes Function: Non (check) valve for oneway flow control Material: Aluminium construction for strength and corrosion resistance Sizes available: 6 mm (this item), 8 mm, 10 mm, 12 mm Applications: Fuel lines, water lines, gas and air lines, vacuum systems Typical use placement: Inline installation between hose sections to prevent backflow Use cases Outboard motor fuel line: Install the valve inline on a smalldiameter fuel hose to prevent fuel from siphoning back into the tank when the engine is shut off. Bilge or water pump system on a boat: Keep bilge or washdown systems from draining back into the pump or tank, maintaining pump priming and preventing contamination. Automotive vacuum or air line protection: Use on vacuum feed lines or small air hoses to maintain vacuum integrity and prevent reverse airflow that can affect engine control or accessories. Installation and maintenance notes Select the correct valve size for your hose (this listing: 6 mm). Ensure hose and clamps are properly seated to maintain a leak connection. Check flow direction before installation; the valve must be oriented for the intended flow path. Periodically inspect for corrosion, debris or wear, especially in harsh marine environments. Clean or if performance degrades. Compatibility and suitability Designed for common marine and automotive inline hose applications involving fuel, petrol, water, air, gas and vacuum lines. Available in four standard hose sizes to match typical smalldiameter systems: 6/8/10/12 mm. This product is the 6 mm variant. A practical, durable solution for preventing backflow in a variety of small hose installations where a compact aluminium oneway valve is required.