{"product_id":"powerworks-pv2-brass-proportioning-valve-172-1353-disc-front-drum-rear-brake-bias-control-solid-brass","title":"POWERWORKS PV2 Brass Proportioning Valve 172-1353 — Disc Front \/ Drum Rear Brake Bias Control, Solid Brass","description":"\u003cp\u003e\u003cstrong\u003ePOWERWORKS PV2 Brass Proportioning Valve 172-1353 is a solid-brass combination valve that balances front disc and rear drum braking pressure for dual-reservoir master cylinder systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact PV2 proportioning valve from POWERWORKS is built for reliable brake bias control where vehicles use front disc and rear drum brakes. Machined from solid brass, it provides corrosion resistance and long-term durability while fitting most dual-reservoir master cylinder setups. Designed as a drop-in solution for replacements or custom brake plumbing, the 172-1353 model helps maintain proper rear brake modulation to reduce premature wheel lock-up and uneven stopping.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the PV2 proportioning valve affect brake performance?\u003c\/h3\u003e\n\n\u003cp\u003eThe valve adjusts hydraulic pressure to the rear drum circuit relative to the front discs, helping prevent rear-wheel lockup under hard braking. It doesn't alter master cylinder output; it proportionally reduces rear pressure to match the vehicle's brake geometry and weight distribution.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBalances front\/rear brake force for safer stops.\u003c\/li\u003e\n  \u003cli\u003eReduces risk of rear lockup on heavy braking.\u003c\/li\u003e\n  \u003cli\u003eDesigned for disc front and drum rear brake systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and master cylinders is this PV2 valve compatible with?\u003c\/h3\u003e\n\n\u003cp\u003eThe 172-1353 is a universal-style PV2 proportioning valve that fits most dual-reservoir master cylinders and many classic or modern vehicle brake systems. It is commonly used as a replacement on American makes, including Chevy platforms, and in custom brake setups.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with most dual-reservoir master cylinders.\u003c\/li\u003e\n  \u003cli\u003eWorks for disc-front, drum-rear brake layouts (disc\/drum).\u003c\/li\u003e\n  \u003cli\u003eCommon fitment for Chevy and other vehicles with similar brake plumbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build and connection specifics I should know before buying?\u003c\/h3\u003e\n\n\u003cp\u003eThe valve is constructed from solid brass for heavy-duty service and corrosion resistance. Brake-line port sizes are standard 1\/2\" and 7\/16\", so verify hose or hard-line fittings match or adapt accordingly prior to installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMaterial: solid brass for durability and rust resistance.\u003c\/li\u003e\n  \u003cli\u003ePort sizes: 1\/2\" and 7\/16\" brake line ports — adapters may be required.\u003c\/li\u003e\n  \u003cli\u003eModel reference: 172-1353 (disc-drum) — also available in disc-disc variant 172-1361.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation difficult and what should I prepare?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation requires basic hydraulic brake knowledge, proper line fitting, and bleeding of the brake system. While the valve is a straightforward mechanical component, safe installation includes securing proper torque, leak testing, and complete system bleeding to remove air.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTools: wrenches sized for 1\/2\" and 7\/16\" fittings, thread sealant or appropriate line adapters.\u003c\/li\u003e\n  \u003cli\u003eSteps: mount valve, connect inlet\/outlets, torque fittings, and fully bleed brakes.\u003c\/li\u003e\n  \u003cli\u003eSafety: test slowly and check for leaks before road use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The POWERWORKS PV2 172-1353 is aimed at mechanics, restoration enthusiasts, and DIYers working on vehicles with front disc and rear drum brakes who need a durable, brass proportioning valve that fits most dual-reservoir master cylinders. It's a practical choice for brake replacements, custom brake lines, or upgrades where reliable pressure balancing and corrosion resistance are priorities.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this valve fit my dual-reservoir master cylinder?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the PV2 172-1353 is designed to fit most dual-reservoir master cylinders; confirm port sizes and mounting clearance first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the brake line port sizes on this valve?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The valve uses 1\/2\" and 7\/16\" brake line ports; use adapters if your lines have different fittings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"POWERWORKS","offers":[{"title":"Default Title","offer_id":55170168652119,"sku":"B081Q6ZKCH","price":60.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/powerworks-pv2-front-view.jpg?v=1790424487","url":"https:\/\/britishgarage.co.uk\/products\/powerworks-pv2-brass-proportioning-valve-172-1353-disc-front-drum-rear-brake-bias-control-solid-brass","provider":"British Garage","version":"1.0","type":"link"}