POWERWORKS PV2 Proportioning Valve for Front Disc/Rear Drum - 172-1353 Solid Brass, Dual-Reservoir Compatible

If your vehicle uses a dual-reservoir master cylinder and a front-disc/rear-drum brake setup, this PV2 proportioning valve provides a durable, serviceable way to tune rear-brake pressure and prevent rear-wheel lockup under heavy braking. Built from solid brass with common brake-line port sizes, it serves as a universal replacement or upgrade for many cars and trucks, including Chevy applications.

How does this valve improve brake balance on mixed disc-and-drum systems?

The valve reduces hydraulic pressure to the rear drum circuit compared with the front disc circuit, so the rear wheels are less likely to grab and lock during hard stops. That modulation helps maintain vehicle stability and more predictable brake feel when decelerating from higher speeds.

• Proportioning action tailored for disc front/drum rear layouts
• Reduces rear brake locking risk under heavy braking
• Improves overall brake modulation and pedal response

What fittings and master-cylinder types does the PV2 172-1353 work with?

This valve is built to match most dual-reservoir master cylinders and uses two common brake-line port sizes for easy plumbing. The brake-line inlets are sized 1/2" and 7/16", making it straightforward to integrate into many existing brake systems without custom adapters.

• Compatible with dual-reservoir master cylinders
• Brake line ports sized 1/2" and 7/16" for standard fittings
• Direct replacement for many OEM and aftermarket installations

Why choose a solid-brass PV2 valve over other materials?

Brass offers strong corrosion resistance and mechanical durability in brake-system environments, extending service life and reducing the chance of leaks. A brass valve body also allows reliable threaded connections and stands up well to repeated service or reconfiguration.

• Corrosion-resistant solid-brass construction
• High durability under frequent brake-fluid exposure
• Robust threads and fittings for leak-free connections

Will this valve fit my vehicle and how is it identified?

The PV2 172-1353 is marketed as a universal disc/drum proportioning valve and is commonly used on Chevy and many other makes with similar brake plumbing. It corresponds to POWERWORKS part numbers for disc-drum applications and is directly interchangeable with many aftermarket PV2-style units.

• Listed for disc front / drum rear (172-1353)
• Universal fitment for many dual-reservoir systems
• Fits common line sizes and can replace OEM PV2 valves

Who is this for? Automotive owners, restorers, and mechanics who need a reliable proportioning valve for vehicles with front disc and rear drum brakes will benefit from the POWERWORKS PV2 172-1353. It’s well suited for classic car rebuilds, performance brake upgrades, or routine brake-system repairs where a long-lasting brass valve and standard fittings simplify installation and maintenance.