1 Arrow marked on valve, showing fluid flow direction, prevents fuel from returning back to the tank and keeps it in the line. 2 Fine workmanship and stable performance. High strength and hardness and durable in use. 3 Suitable for using with petrol, diesel, biodiesel, water, coolant, oil, air/vacuum. 4 Great for water pressure pumps \u0026 galley pumps which are not self-priming. 5 Easy to install and replace. Ideal for marine, automotive, caravans/RV, and agriculture.

What's in the box
1 x Check Valve