Feature: 1. Main Function: The basic design of a one way check valve inhibits back flow in a line. Arrow marked on valve, showing fluid flow direction, preventing fuel from returning back to the tank and keeps it in the line. In this way, this product can perfectly solve the problem that your vehicle is hard or slow starting issues. 2. Durable Construction: The non return check valve body is made of high quality aluminum alloy, can use longer than plastic one. Stable characteristics, high reliability. The push lock design of the connector stop the hose from sliding off and easy to connect. Surface anodized for great appearance and anti‑rust, superior thread strength. 3. Wide Application: One‑way check valve installs in many diesel / bio fuel systems / Carburetors and low pressure fuel systems where you desire fuel to only flow one way. Suitable for water, petrol, diesel, oil, and other fluids. Note:This fuel non return one way check valve cannot be used in methyl alcohol because formic acid will be produced while it is powered on, which will lead to the uselessness. 4. Sophisticated Production: The opening pressure is 0.2 bar, the working pressure range is 0.2‑6 bar, and the working temperature range is ‑30 ℃‑130 ℃. This part is a universal part made to fit almost every vehicle, strict product quality control tests are passed before leaving the factory, so there is no need to worry about any product problems. 5. Easy Installation: According to the little arrow on the valve, connect the fuel line. You can use some hose clamps which can make sure the pipes don't drop off. The main advantage of a non‑return check valve is its simple design. This simple design make the check valves has a small size and easy to install, making maintenance easier and more efficient. Specification: Item Type: One-way check valve Color: Silver Material: Aluminum alloy Connection Form: Card set Cracking Pressure: 0.2 bar Working Pressure Range: 0.2-6 bar Working Temperature Range: -30 ℃-130 ℃ Application: Universally used for gasoline, diesel, biodiesel, water, coolant, oil, air/vacuum.. Package List: 1 x One Way Check Valve