{"product_id":"general-pump-100538-4000-psi-adjustable-thermostat-86-250f-16","title":"General Pump 100538 4000 PSI Adjustable Thermostat 86-250F 16","description":"\u003cdiv class=\"sbs-content\"\u003e\n\u003cdiv class=\"sbs-badges\"\u003e\u003cspan class=\"sbs-badge\"\u003e\u003cspan class=\"sbs-badge__label\"\u003ePSI\u003c\/span\u003e 4000\u003c\/span\u003e\u003c\/div\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\"\u003eCommonly Used For: Pressure Washer Power Systems\u003c\/div\u003e\n\u003cdiv class=\"sbs-svc-banner__desc\"\u003eContractor-grade - trusted by professionals across the Mid-Atlantic region.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\n\u003ch2\u003eGeneral Pump Pressure Washer Pump - Professional Grade\u003c\/h2\u003e\n\u003cp\u003eThis general pump pressure washer pump is built for professional pressure washing contractors and commercial cleaning operations, with rated for 4000 PSI. Designed for the demands of daily commercial use - not weekend homeowner projects. General Pump has earned a reputation among working contractors for building equipment that holds up under daily use. Available at Sun Brite Supply in Gaithersburg, MD - stocked and ready to ship.\u003c\/p\u003e\n\u003cp\u003eThe 4000 PSI rating handles the pressures of commercial-grade systems without exceeding safe operating limits. Every component at Sun Brite Supply is the same equipment our team has used and trusted across 30 years in the pressure washing industry. We don't stock consumer-grade parts with professional labels - if it's in our catalog, it's contractor-tested.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\u003ch2\u003eWhere Contractors Use This Pressure Washer Pump\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\"\u003eCommercial Fleet Washing\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003ePowers high-output machines for daily fleet and building wash operations.\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\"\u003eConstruction Site Cleanup\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eHandles the pressures of post-construction concrete and equipment washing.\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-Mount Rigs\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eIntegrates into trailer and truck-mounted systems for mobile contractors.\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\"\u003eEquipment Rebuilds\u003c\/div\u003e\n\u003cdiv class=\"sbs-card__desc\"\u003eDirect replacement for worn pumps - match GPM and RPM to your existing setup.\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\u003eTriplex plunger pumps deliver smooth, low-pulsation flow that's easier on your system than axial cam designs. The ceramic plungers resist wear from abrasive water, and the forged brass manifold handles thermal cycling without cracking. These pumps are built for thousands of hours of commercial operation when properly maintained. 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-compare\"\u003e\n\u003cdiv class=\"sbs-compare__box sbs-compare__box--highlight\"\u003e\n\u003cdiv class=\"sbs-compare__label\"\u003eBelt Drive Pump\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__value\"\u003e3,000+\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__unit\"\u003eService Hours\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__vs\"\u003eVS\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__box\"\u003e\n\u003cdiv class=\"sbs-compare__label\"\u003eDirect Drive Pump\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__value\"\u003e500-1,000\u003c\/div\u003e\n\u003cdiv class=\"sbs-compare__unit\"\u003eTypical Lifespan\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-section\"\u003e\u003cp\u003eThe performance gap between professional-grade and consumer-grade equipment shows up on every job. Contractors who invest in commercial components spend less on replacements, finish jobs faster, and deliver results that earn repeat business and referrals. That's the math that matters when you're running a pressure washing company - not just the upfront price tag.\u003c\/p\u003e\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\u003eMatch GPM and PSI to Engine\u003c\/h4\u003e\n\u003cp\u003eCheck your engine's HP and RPM output against the pump's rated input. Over-driving a pump beyond its rated RPM burns seals in weeks. Under-driving it gives you low pressure and cavitation.\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\u003eCheck Shaft and Mounting\u003c\/h4\u003e\n\u003cp\u003eVerify shaft diameter, key size, and mounting pattern match your frame or engine coupler. Belt drive pumps need matched sheave ratios for correct RPM.\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\u003ePrime and Test\u003c\/h4\u003e\n\u003cp\u003eFill the pump with water before first start - running dry even for seconds damages ceramic plungers. Check for leaks at all fittings before putting the machine under load.\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 Always use a thermal relief valve with your pump. Water sitting in bypass overheats and warps the head - a $12 valve saves a $600 pump.\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\"\u003eGas Engines\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eElectric Motors\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eBelt Drive\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eDirect Drive\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eTrailer Rigs\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003eSkid Units\u003c\/span\u003e\u003cspan class=\"sbs-compat__tag\"\u003e4000 PSI Systems\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGeneral Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePressure Washer Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Pressure\u003c\/td\u003e\n\u003ctd\u003e4000\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\u003eWinterize your pump if the machine sits in freezing temperatures. Water expanding inside the pump head cracks the manifold. Drain all water and run pump antifreeze through the system before storage.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace vs. Repair\u003c\/h3\u003e\n\u003cp\u003eIf this pressure washer pump 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 pressure washer safety guidelines\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 pressure washer pump used for?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eThis pressure washer pump is designed for professional pressure washing applications, specifically for pressure washer power systems. It's built for contractors who need reliable, commercial-grade equipment for daily operations on the job site.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__item\"\u003e\n\u003cdiv class=\"sbs-faq__q\"\u003eWhat pressure rating does this product have?\u003c\/div\u003e\n\u003cdiv class=\"sbs-faq__a\"\u003eThis pressure washer pump is rated for 4000 PSI. Always verify your system's operating pressure before installation - using components rated below your system pressure is a safety hazard.\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\/pressure-washer-pumps\"\u003ePW Pumps\u003cspan\u003eBrowse Collection →\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/collections\/pump-parts\"\u003ePump Parts\u003cspan\u003eBrowse Collection →\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/collections\/unloaders\"\u003eUnloaders\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\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is this pressure washer pump used for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This pressure washer pump is designed for professional pressure washing applications, specifically for pressure washer power systems. It's built for contractors who need reliable, commercial-grade equipment for daily operations on the job site.\"}},{\"@type\":\"Question\",\"name\":\"What pressure rating does this product have?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This pressure washer pump is rated for 4000 PSI. Always verify your system's operating pressure before installation - using components rated below your system pressure is a safety hazard.\"}},{\"@type\":\"Question\",\"name\":\"How quickly do you ship orders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In-stock items ship within 24 hours from our Gaithersburg, MD warehouse. Local customers can arrange same-day counter pickup. Call (301) 519-9274 to confirm availability and get a shipping estimate.\"}},{\"@type\":\"Question\",\"name\":\"What is your return policy?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Unopened 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 (301) 519-9274 and we'll make it right.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Sun Brite Supply","offers":[{"title":"Default Title","offer_id":45032531230920,"sku":"6712","price":54.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0517\/4827\/4376\/files\/6712_01_web.png?v=1774232719","url":"https:\/\/sunbritesupplymd.com\/products\/general-pump-100538-4000-psi-adjustable-thermostat-86-250f-16","provider":"Sun Brite Supply","version":"1.0","type":"link"}