This high-quality check valve (one-way shuttle valve) from Italian manufacturer Malpassi is engineered to ensure that fluids only flow in a single, intended direction. Its primary and most valued function within a fuel system is to effectively prevent fuel from draining back into the fuel tank when the engine is turned off. By keeping the fuel lines fully primed, the valve guarantees much faster and considerably more reliable cold starts, especially on classic vehicles or marine applications that tend to lose fuel pressure while parked.

The main valve body is precision-machined from aerospace-grade aluminum, making it exceptionally durable against external elements while remaining incredibly lightweight. Internally, it is equipped with advanced Viton seals, allowing the valve to effortlessly handle high operating pressures and aggressive fluids including petrol, diesel, oil, water, and modern ethanol fuel blends such as E10 and E85. Whether you are running a classic carburetor setup or a modern high-pressure electronic fuel injection system, this is a safety component you can completely rely on.

Technical specifications:

• Hose connection: 8 mm barbed ends
• Body material: Aerospace-grade aluminum
• Internal seal: Viton
• Overall length: 60 mm (including hose barbs)
• Width: 30 mm
• Weight: A mere 35 grams
• Compatibility: Petrol, Diesel, Oil, Water, E10, and E85

Workshop tip: Always mount the check valve so the directional arrow points toward the engine. Secure the fuel hose firmly with high-quality hose clamps on both sides of the valve to ensure a completely leak-free and safe installation.