Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum
Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum is a compact, chrome-finished brake system component with brass internals, priced at $37.10. It combines a distribution block and adjustable proportioning valve to regulate rear brake pressure and maintain front-rear brake bias. Ideal for automotive brake upgrades in vehicles with dual bowl master cylinders, reducing leaks and simplifying plumbing.
● In stock
Buy at Lab Work Auto →Price and availability may change. Click to see current details on Lab Work Auto.
Key features
- All-in-one proportioning valve and distribution block
- Rotary adjustment for rear brake pressure control
- Includes brake light switch and wiring pigtail
- Brass internal components for corrosion resistance
- Dual 3/8-24 inlets for dual bowl master cylinders
- Five 3/16-inch chrome steel brake line fittings
- Compact, lightweight design under 1 pound
Pros
- +Reduces number of fittings and leak points
- +Easy-to-use pressure adjustment with clear indicators
- +Includes wiring pigtail for brake light integration
- +Durable chrome and brass construction
- +Simplifies brake system plumbing
Cons
- −Only compatible with dual bowl master cylinders
- −3/16-inch lines only, not adaptable to larger sizes
About Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum
What is Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum?
This all-in-one brake system component from Lab Work Auto integrates a proportioning valve and distribution block to streamline brake fluid management in disc/drum braking systems. Designed for use with dual bowl master cylinders, it routes fluid from the master cylinder to all four wheels while allowing precise adjustment of rear brake pressure. The unit helps maintain optimal brake bias, improving safety and performance during braking. Weighing under 1 pound and featuring chrome-plated steel fittings, it's built for durability and leak-resistant installation in automotive restoration or performance upgrade projects.
Key features
- Integrated Design — Combines proportioning valve, distribution block, and brake light switch in one unit.
- Adjustable Brake Bias — Rotary knob with directional arrows fine-tunes rear brake pressure.
- Brass Internal Components — Resists corrosion and ensures reliable fluid flow.
- Dual Inlets from Master Cylinder — Compatible with dual bowl master cylinders for independent circuit routing.
- Five 3/16-inch Steel Fittings Included — Supports 3/16 brake lines with chrome finish for durability.
- Wiring Pigtail Included — Direct connection for brake light switch integration.
- Leak-Reduced Configuration — Minimizes fittings and connections, lowering failure risk.
Who is Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum for?
This product suits DIY automotive enthusiasts, hot rod builders, and restoration specialists working on vehicles with disc/drum brake setups. It’s ideal for those upgrading from factory brake systems or installing aftermarket master cylinders. Users benefit from simplified plumbing and enhanced braking control without complex fabrication.
How does Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum compare?
Compared to standalone distribution blocks or fixed proportioning valves, this unit reduces part count and potential leak points. Unlike basic blocks, it offers on-the-fly rear pressure adjustment. It outperforms standard polypropylene or aluminum-only blocks by integrating a brake light switch and using brass internals for longevity. While similar units may require separate mounting, this compact design consolidates functions into a single, space-saving component.
Best use cases
- →Restoring classic cars with disc/drum brakes
- →Upgrading brake systems in hot rods
- →Installing aftermarket dual bowl master cylinders
- →Reducing brake plumbing complexity
- →Fine-tuning rear brake bias for safety
Is Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum right for you?
This adjustable proportioning valve is best for intermediate to advanced DIYers working on vehicle brake upgrades or restorations. It's ideal for those using dual bowl master cylinders and needing precise rear brake control. If you're simplifying brake lines or converting from drum-only systems, this unit saves time and parts. For stock replacements or single-circuit systems, a standard distribution block may suffice.
How it compares: Compared to separate proportioning valves and distribution blocks, this unit reduces assembly time and potential leaks. It offers more adjustability than fixed valves and greater integration than basic steel blocks, making it a superior choice for custom disc/drum brake setups.
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$7.91Frequently Asked Questions
What does an adjustable proportioning valve do?
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It controls rear brake pressure to maintain proper balance between front and rear brakes, preventing rear wheel lockup during hard stops, especially in disc/drum configurations where front brakes handle more force.
Does this fit single bowl master cylinders?
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No, this unit is designed specifically for dual bowl master cylinders with two separate output circuits, commonly used in modern disc/drum brake systems for independent front and rear circuit control.
How do you adjust rear brake pressure?
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Use the rotary knob with directional arrows: turn clockwise to increase rear pressure, counterclockwise to reduce it, allowing fine-tuning of brake bias without disassembly.
Is the brake light switch included?
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Yes, it has an integrated brake light switch with a wiring pigtail for direct connection to your vehicle’s brake light circuit, eliminating the need for a separate switch.
Can this be used in all-disc brake systems?
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While primarily designed for disc/drum setups, it can work in all-disc systems if rear pressure modulation is needed, though many all-disc systems use different bias strategies.
How much does Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum cost?
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Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum is $37.10 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum in stock at Lab Work Auto?
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Yes, Adjustable Proportioning Valve & Distribution Block Brake Fittings Disc / Drum is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-016491