{"product_id":"st-53-complete-replacement-valve-assy","title":"St-53 Complete Replacement Valve Assy.","description":"\u003cdiv class=\"sbs-content\"\u003e\n\u003cdiv class=\"sbs-svc-banner sbs-svc-banner--service\"\u003e\n\u003cspan class=\"sbs-svc-banner__icon\"\u003e🔧\u003c\/span\u003e\u003cdiv class=\"sbs-svc-banner__body\"\u003e\n\u003cdiv class=\"sbs-svc-banner__title\"\u003eMade For: ST-53 Valve Rebuilds\u003c\/div\u003e\n\u003cdiv class=\"sbs-svc-banner__desc\"\u003eA complete replacement valve assembly that brings a worn ST-53 back to life.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eST-53 Complete Replacement Valve Assembly - Fix the Valve, Keep the Body\u003c\/h2\u003e\n\u003cp\u003eThis is the complete internal valve assembly for the ST-53. Instead of tossing the whole unit when it starts leaking or sticking, you drop this assembly in and keep the body you already own. It's in stock at Sun Brite Supply in Gaithersburg, MD and ready to ship.\u003c\/p\u003e\n\u003cp\u003eValves wear out from daily cycling, that's just the job. When yours starts weeping or won't shut off cleanly, this assembly brings back a tight seal without buying a whole new unit. Keep one in the truck and a mid-job leak stops being a big deal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\u003ch2\u003eWhere Contractors Use This Valve Assembly\u003c\/h2\u003e\u003c\/div\u003e\n\u003cdiv class=\"sbs-cards sbs-cards--2col\"\u003e\n\u003cdiv class=\"sbs-card\"\u003e\n\u003cspan class=\"sbs-card__icon\"\u003e🔧\u003c\/span\u003e\u003cdiv class=\"sbs-card__title\"\u003eST-53 Rebuilds\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eSwap the complete assembly and get a tight seal back in minutes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-card\"\u003e\n\u003cspan class=\"sbs-card__icon\"\u003e🏢\u003c\/span\u003e\u003cdiv class=\"sbs-card__title\"\u003eLeak Fixes\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eStop a weeping valve that bleeds off pressure and soaks your setup.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-card\"\u003e\n\u003cspan class=\"sbs-card__icon\"\u003e📦\u003c\/span\u003e\u003cdiv class=\"sbs-card__title\"\u003eIn-Stock Ready\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eShips within 24 hours from our Gaithersburg, MD warehouse.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-card\"\u003e\n\u003cspan class=\"sbs-card__icon\"\u003e☎️\u003c\/span\u003e\u003cdiv class=\"sbs-card__title\"\u003eTruck Spares\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eKeep one on the rig so a worn valve never ends a wash day early.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eApplication and Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis component integrates into standard commercial pressure washing systems using industry-standard connections. Verify the specifications listed below against your existing equipment before ordering. Thread sizes, pressure ratings, and flow capacities must match your system for safe, leak-free operation. If you're not sure about compatibility, call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e - we match parts to machines every day.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eContractor-Grade Quality\u003c\/h2\u003e\n\u003cp\u003eThere's a real difference between professional equipment and consumer-grade alternatives sold at hardware stores. Consumer parts are built to a price point - they work fine for the homeowner who pressure washes their deck once a year. But put those same parts on a commercial rig running 8 hours a day, 5 days a week, and they fail fast. This pressure washer part is built for that daily grind. The materials, tolerances, and construction are designed for thousands of hours of commercial operation. That's why contractors come to Sun Brite Supply instead of buying online from unknown vendors - we carry the brands and specs that working professionals trust.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-steps\"\u003e\n\u003ch2\u003eInstallation and Setup\u003c\/h2\u003e\n\u003cdiv class=\"sbs-step\"\u003e\n\u003cdiv class=\"sbs-step__num\"\u003e1\u003c\/div\u003e\n\u003cdiv class=\"sbs-step__body\"\u003e\n\u003ch4\u003eVerify Compatibility\u003c\/h4\u003e\n\u003cp\u003eCheck the specifications against your existing equipment. Thread sizes, pressure ratings, and flow capacities must match for safe operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-step\"\u003e\n\u003cdiv class=\"sbs-step__num\"\u003e2\u003c\/div\u003e\n\u003cdiv class=\"sbs-step__body\"\u003e\n\u003ch4\u003eInstall According to Specs\u003c\/h4\u003e\n\u003cp\u003eFollow the manufacturer's installation guidelines. Use appropriate thread sealant on pipe connections. Don't overtighten fittings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-step\"\u003e\n\u003cdiv class=\"sbs-step__num\"\u003e3\u003c\/div\u003e\n\u003cdiv class=\"sbs-step__body\"\u003e\n\u003ch4\u003eTest Under Pressure\u003c\/h4\u003e\n\u003cp\u003eAfter installation, test at low pressure first. Check all connections for leaks before running at full operating pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-callout sbs-callout--tip\"\u003e\n\u003cspan class=\"sbs-callout__icon\"\u003e💡\u003c\/span\u003e\u003cdiv class=\"sbs-callout__text\"\u003e\n\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Keep spare parts on your rig. The cost of downtime on a commercial job always exceeds the cost of carrying a few critical replacement components.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-callout sbs-callout--warning\"\u003e\n\u003cspan class=\"sbs-callout__icon\"\u003e⚠️\u003c\/span\u003e\u003cdiv class=\"sbs-callout__text\"\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Always verify pressure ratings, thread sizes, and flow specifications match your existing system before installation. Using components rated below your machine's operating pressure creates a safety hazard. When in doubt, call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-compat\"\u003e\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cdiv class=\"sbs-compat__grid\"\u003e\n\u003cspan class=\"sbs-compat__tag\"\u003eST-53 Bodies\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eWand and Lance Setups\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eValve Rebuild Jobs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-table-wrap\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"sbs-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eReplacement Valve Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShips From\u003c\/td\u003e\n\u003ctd\u003eGaithersburg, MD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eMaintenance and Troubleshooting\u003c\/h2\u003e\n\u003cp\u003eInspect this component during your regular maintenance routine. Check for wear, leaks, corrosion, and proper operation. Replacing worn parts on schedule prevents mid-job failures that cost you time and money.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace vs. Repair\u003c\/h3\u003e\n\u003cp\u003eIf this pressure washer part shows signs of wear but is still functional, a rebuild kit or replacement seals may extend its service life at a fraction of the full replacement cost. However, if you see cracks, cross-threading, severe corrosion, or complete failure under pressure, replacement is the safer and more economical choice. Call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e and we'll help you decide. Always follow \u003ca href=\"https:\/\/www.osha.gov\/pressure-washing\" rel=\"noopener\" target=\"_blank\"\u003eOSHA equipment safety standards\u003c\/a\u003e when working with high-pressure equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"sbs-faq__item\"\u003e\n\u003cdiv class=\"sbs-faq__q\"\u003eWhat is this replacement valve assembly used for?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eIt's the complete internal valve assembly for the ST-53. When the valve starts leaking or won't shut off cleanly, you swap this assembly in and keep using the body you already own instead of buying a whole new unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__item\"\u003e\n\u003cdiv class=\"sbs-faq__q\"\u003eIs this pressure washer part compatible with my pressure washer?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eCheck the specifications above against your machine's requirements. Thread sizes, pressure ratings, and flow capacities must match. Call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e if you need help with fitment.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__item\"\u003e\n\u003cdiv class=\"sbs-faq__q\"\u003eHow quickly do you ship orders?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eIn-stock items ship within 24 hours from our Gaithersburg, MD warehouse. Local customers can arrange same-day counter pickup. Call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e to confirm availability and get a shipping estimate.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__item\"\u003e\n\u003cdiv class=\"sbs-faq__q\"\u003eWhat is your return policy?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eUnopened and unused items can be returned within 30 days for store credit. If something arrives damaged or isn't what you expected, call us at \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e and we'll make it right.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-cta\"\u003e\n\u003cdiv class=\"sbs-cta__text\"\u003e\n\u003ch3\u003eNeed Help Choosing the Right Part?\u003c\/h3\u003e\n\u003cp\u003e30+ years of industry experience. We match parts to machines every day.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ca href=\"tel:+13015199274\" class=\"sbs-cta__phone\"\u003e☎ (301) 519-9274\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-related\"\u003e\n\u003ca href=\"\/collections\/all\"\u003eShop All Products\u003cspan\u003eBrowse Collection →\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/collections\/fittings\"\u003eFittings\u003cspan\u003eBrowse Collection →\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/collections\/accessories\"\u003eAccessories\u003cspan\u003eBrowse Collection →\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eWhy Buy From Sun Brite Supply?\u003c\/h2\u003e\n\u003cp\u003eSun Brite Supply has served pressure washing contractors from our Gaithersburg, MD location since 2011. We stock the professional-grade parts and equipment you won't find at big box stores. Every in-stock order ships within 24 hours. Local customers can pick up the same day. Call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e and talk to someone who knows this equipment - not a call center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-callout sbs-callout--info\"\u003e\n\u003cspan class=\"sbs-callout__icon\"\u003e📦\u003c\/span\u003e\u003cdiv class=\"sbs-callout__text\"\u003e\n\u003cstrong\u003eShipping \u0026amp; Returns:\u003c\/strong\u003e In-stock items ship within 24 hours from Gaithersburg, MD. Same-day counter pickup for local contractors. Unopened items may be returned within 30 days for store credit. Call \u003ca href=\"tel:+13015199274\"\u003e(301) 519-9274\u003c\/a\u003e with questions.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sun Brite Supply","offers":[{"title":"Default Title","offer_id":45032501903560,"sku":"5892","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0517\/4827\/4376\/files\/5892_636e2aa8-680c-4eb0-a0c2-0ea41f100602.png?v=1784853327","url":"https:\/\/sunbritesupplymd.com\/products\/st-53-complete-replacement-valve-assy","provider":"Sun Brite Supply","version":"1.0","type":"link"}