Features: 1. The aluminum head has a longer service life compared to plastic heads. 2. Arrow marked on valve indicates fluid flow direction, prevents fuel from flowing back to the tank and maintains fuel in the line. 3. Suitable for water pressure pumps and galley pumps that are not self-priming. 4. Professional-grade non-return valve ideal for marine, automotive, caravan/RV, and agricultural applications. 5. Stable performance with high reliability. 6. Easy to install and replace. Specification: Product name: One-way Non-return Valve Condition: New Color: Silver Construction: Aluminium Valve Opening (Cracking) Pressure: 1.5psi Operating Pressure Range: 1.5psi to 65psi Max backpressure: 72psi Optional Diameter of Cylinder: 6mm/0.24in, 8mm/0.32in, 10mm/0.39in, 12mm/0.47in Fitment: Universal Suitable for use with petrol, diesel, biodiesel, water, coolant, oil, air/vacuum. Package List: 1 * Check Valve