Rear Check Valve: Description
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
The rear check valve (2) connects the liftgate spoiler washer hose to the supply washer hose and is located near the upper liftgate header within the spoiler. The check valve consists of a molded plastic valve body with a raised arrowhead (4) molded into its center section indicating the direction of the flow through the valve. A barbed hose nipple (1 and 3) is formed on each side of the raised center section of the valve body. Within the check valve body, a small diaphragm is held against the lip of an integral sump well by a small plastic piston and a coiled spring.
The rear check valve cannot be adjusted or repaired and, if ineffective or damaged, it must be replaced.