Deatschwerks 10AN to 10AN Male Flare One Way Check Valve -

Designed to permit flow one way but not the other
Install where fluid should not return the opposite direction
Helps prevent lines from running dry
Deatschwerks couplers have been produced to help deliver fuel from your tank to your engine with optimal performance and flow in mind. Non-restrictive, and manufactured to every applicable JIC and SAE standard , these couplers are constructed of heat-treated 6061 T-6 aluminum that is anodized in a titanium finish. The titanium finish compliments both OE and aftermarket engine bays and hides marks far better than standard black fittings. These high-grade materials and coatings are strong, light, and anti-corrosive for use in the most demanding fuel systems. This is a 10AN one way check valve designed to permit flow one way but not the other. Examples of applications would include at the end of your fuel rail to allow return to the tank but retain pressure when shut off. All couplers can be installed anywhere in-line, and as long as they installed properly they will not leak and can with-stand years of high volume flow and demand for delivery.