Mandark 5/16” Car One Way Check Valve, 2 Pack
$4.99 on Amazon.com (as of October 18, 2026, 11:56 AM EST) View details ↗
The Mandark 5/16” Car One Way Check Valve is a top-tier solution for regulating unidirectional fluid flow in automotive fuel lines. Crafted from durable aluminum alloy, this valve features stainless steel clamps that offer exceptional corrosion resistance, ensuring longevity and reliability in various fuel and fluid applications. Its robust design resists damage and deformation, providing high strength and outstanding durability essential for fuel line maintenance and modifications.
This check valve is designed to fit most vehicles, including SUVs, sedans, trucks, and motorcycles. It accommodates hoses for transporting gasoline, diesel, engine oil, and water, making it versatile for different types of automotive fluid transfer. The valve's barbed connectors ensure a secure fit with the connecting hose, preventing accidental disconnection. Arrow markings on the valve body clearly indicate the direction of fluid flow, simplifying installation for even beginners.
| Material | Aluminum Alloy and Stainless Steel |
|---|---|
| Weight | 15 g each (0.52 oz) |
| Package Size | 1.2 x 0.43 x 0.10″ |
| Part Number | Mandark-Steering1 |
| Package Contents | 2 check valves, 4 clamps |






