What is the purpose of a residual pressure valve?

A residual pressure valve retains a small amount of pressure in the brake lines after you release the pedal. This keeps the brake system primed and prevents fluid from draining back into the master cylinder, leading to a firmer and more responsive pedal feel.

Why is this valve rated at 2 psi?

The 2 psi rating is specifically for disc brake systems. Drum brakes typically require a higher pressure, like 10 psi, to overcome the tension of their return springs.

Will this valve cause my brakes to drag?

No, this valve is designed to prevent brake drag. By keeping the caliper pistons slightly extended, it ensures the brake system stays primed without allowing them to retract too far.

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Specifications

Brand: Russell
Part #: 654010
UPC: 87133924847

Russell Performance 2-lb. Polished Residual Valve

Name: Russell Performance 2-lb. Polished Residual Valve
Brand: Russell
SKU: russell-russell-performance-2-lb-polished-residual-valve-t14-302845
Price: 51.50 USD
Availability: BackOrder

$51.50

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Russell Performance 2-lb. Polished Residual Valve. Keeps brake fluid from draining back, for a firmer, more responsive pedal.

Key Features

Fits disc brake systems.
Retains brake line pressure to keep the system primed.
Eliminates spongy pedal feel for a firmer engagement.
Prevents brake fluid from draining back into the master cylinder.
Helps provide increased braking response.
Polished finish for improved appearance.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're working on a disc brake system and notice your brake pedal feels a bit soft or spongy, a residual pressure valve can make a big difference. This part from Russell is designed to keep a small amount of pressure in the brake lines, preventing fluid from draining back into the master cylinder. This means your caliper pistons stay slightly extended, keeping the system primed and ready to go.

What this does is eliminate that mushy feeling you get when the pedal has to travel too far to build pressure. By retaining that baseline pressure, you get a firmer pedal that engages quicker, leading to a more immediate and responsive braking feel. Plus, this polished version looks good under the hood, and it helps prevent brake drag by ensuring the pistons don't retract too far.

This particular valve is rated at 2 psi, which is ideal for most disc brake setups. It's a straightforward part to install when you're bleeding your brakes, and it can really improve the overall feel and performance of your braking system.