PV2 Brass Proportioning Valve Disc/Drum Front Drum Rear Brake

Our review of the PV2 Brass Proportioning Valve finds it best suited for DIY restorers and mechanics updating classic GM street rod brake systems who need a straightforward replacement that balances front and rear braking. The single biggest reason to buy is its universal fit for dual-reservoir master cylinders and solid brass construction, which together make installation predictable and the valve resistant to corrosion in most street applications. It is a practical, low-cost repair part when a disc/drum combination-proportioning valve is required.

Key Features

• Compatibility: Fits most dual-reservoir type master cylinders so it can replace a variety of older proportioning valves without extensive modification.
• Fittings: Brake line ports are 1/2' and 7/16' which match common brake line sizes for easy plumbing during installation.
• Durability: Machined from solid brass for long-lasting resistance to rust and typical street use.
• High Quality: Serves as the universal PV2 combination-proportioning valve for both 172-1353 (disc-drum) applications and 172-1361 (disc-disc) applications when appropriate.
• Fitment: Designed to work on most vehicles, including many Chevy street rods and classic trucks, simplifying parts sourcing.

Who It's For

The PV2 Brass Proportioning Valve is ideal for owners of classic cars and trucks running a mixed disc front/drum rear brake setup who need a direct, low-cost replacement that will bolt into a dual-reservoir master cylinder. It is also useful for fabricators and custom builders assembling brake circuits on street rods where a simple mechanical proportioning solution is required.

Those who need an OEM-grade precision assembly for high-performance racing or heavy-duty towing may want to consider higher-specification valves or adjustable electronic systems, since this unit is targeted primarily at street use and restoration projects rather than extreme duty applications.

Pros & Cons

Pros

• Solid brass body offers corrosion resistance and a serviceable lifetime in normal street conditions.
• Broad compatibility with dual-reservoir master cylinders reduces the need for adapters or custom fittings.
• Common 1/2' and 7/16' brake line ports make plumbing straightforward for most repair jobs.
• Generally good value and easy to install according to user reports.

Cons

• Some customers reported leakage, so careful installation and line sealing are important.
• Build quality reports are mixed, so buyers should inspect for machining finish and threads before installation.

Specifications

Our Verdict

The PV2 Brass Proportioning Valve is a sensible, cost-effective replacement for classic car and truck owners running a disc/drum setup who want a simple mechanical solution that fits most dual-reservoir master cylinders. It delivers useful durability from its brass construction and straightforward plumbing, but buyers should check for leaks and inspect build finish on receipt. For routine street use and restoration projects it represents good value.

Frequently Asked Questions

Will this valve fit my dual-reservoir master cylinder?
Yes, it is designed to fit most dual-reservoir master cylinders common on classic GM and street rod applications.

What brake line sizes does it accept?
The valve uses 1/2' and 7/16' brake line ports to match common line fittings.

Is this suitable for heavy towing or race use?
It is intended for street and restoration use; for heavy towing or track performance an adjustable or higher-spec valve may be more appropriate.