Hey gearheads and DIY mechanics, these GSTP one-way check valves are super handy for keeping your fuel system running smooth! Made from solid aluminum alloy, these 3/8 inch (10mm) valves stop fuel from flowing backward in your lines, which is perfect for diesel, petrol, oil, or water systems—just don’t use them with methyl or alcohol fuels. They work like a charm in cars, boats, RVs, and farm equipment. The push-lock connectors make hose attachment a breeze and keep things secure without slipping off. Installation is straightforward: just follow the arrow on the valve to ensure fuel flows the right way. They handle pressures from 0.2 to 6 bar (about 3–87 PSI) and temps from -30°C to 130°C (-22°F to 266°F), so they’re tough enough for most conditions. Whether you're fixing up an old ride or upgrading your marine setup, these valves are reliable, corrosion-resistant, and built to last. Each pack comes with two valves, so you’ve got a spare ready to go. No leaks, no fuss—just dependable performance to keep your engine happy.
Free 30-day returns 
Free 30-day returns
