The Wilwood Residual Pressure Valve two-pound valve is used in disc brake applications where the master cylinder is mounted below the horizontal plane of the calipers and fluid drain back occurs from gravity and vibration, thereby causing excessive caliper piston retraction and a longer brake pedal stroke. The minimal two pound residual pressure prevents fluid from flowing back without causing the brakes to drag.
 
Features
1/8 in NPT Inlet
1/8 in NPT Outlet
1.600 in Long
Aluminum
Blue Anodized