2 Pack 8mm (5/16") Fuel Line One Way Check Valves – Non-Return For Petrol, Diesel, Oil, Water – EYNDA

Need to stop fuel from flowing backwards in your line?

This 2-pack of EYNDA one-way check valves is exactly what you need.

They’re sized at 8mm, which is also 5/16 of an inch, and they work with petrol, diesel, oil, and even water.

Perfect for automotive, marine, or small engine applications.

Each valve is made from aluminum with a clean silver finish, so they’re durable and corrosion-resistant.

Installation is easy—just cut your line and insert the valve in the right direction.

They’re a direct replacement part, no modifications needed.

Plus, they come with a 1-year manufacturer warranty, so you’re covered if anything goes wrong.

Whether you’re working on a car, a boat, a generator, or anything with a fuel line, these little guys will save you headaches.