Wilwood Residual Pressure Brake Pedal Travel Valve - 10 psi - Red

A residual pressure valve maintains a small amount of pressure (e.g., 2 or 10 psi) in the brake lines even when the pedal is released. This helps keep brake components (like shoes or pads) seated, reduces fluid drain-back, and improves pedal feel by minimizing initial travel.

Drum brakes use return springs to pull the brake shoes away from the drum. The 10 psi provided by this valve helps overcome that spring tension, ensuring the shoes remain close to the drum for quicker engagement and a firmer pedal.

Generally, the 10 psi valve is too high for most disc brake applications and can cause brake drag. The 2 psi (blue) valve is typically recommended for disc brakes, especially when the master cylinder is mounted below the calipers.

It means the valve is machined from a solid block of aluminum (billet), resulting in a strong, precise, and durable component compared to cast metal parts.

Both the inlet and outlet ports are threaded with 1/8-27 NPT (National Pipe Taper).

The 10 psi (red) is standard for most drum brake systems. The 2 psi (blue) is standard for most disc brake systems. Consult your vehicle's service manual or a braking system specialist if unsure.

Verify the valve is installed in the correct orientation and that the system is properly bled. Ensure the 10 psi rating is appropriate for your drum brake system; if return spring tension is unusually high, a higher psi valve might be needed (though this is uncommon).

Check that thread sealant was used on the fittings and that they are tightened securely but not over-tightened. Inspect fittings for damage.

The 10 psi residual pressure might be too high for your specific drum brake setup, causing slight drag. Consider if a 2 psi valve (for disc brakes) or a different residual pressure valve setting is more appropriate, though 10 psi is standard for most drum applications.