{"product_id":"22971c-hi-flow-pressure-washer-unloader-valve-35-7-gpm-1740-psi-oem-replacement-part","title":"22971C Hi-Flow Pressure Washer Unloader Valve 35.7 GPM 1740 PSI – OEM Replacement Part","description":"\u003cp data-start=\"0\" data-end=\"193\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 4464\u003cbr data-start=\"21\" data-end=\"24\"\u003e\u003cstrong data-start=\"24\" data-end=\"37\"\u003eCategory:\u003c\/strong\u003e Pressure Washer Parts → Unloader Valves → High-Flow Pressure Actuated Unloader Valves\u003cbr data-start=\"123\" data-end=\"126\"\u003e\u003cstrong data-start=\"126\" data-end=\"135\"\u003eType:\u003c\/strong\u003e Giant Pumps 22971C Hi-Flow Pressure Washer Unloader Valve\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"195\" data-end=\"198\"\u003e\n\u003cp data-start=\"296\" data-end=\"733\"\u003eThe \u003cstrong data-start=\"300\" data-end=\"358\"\u003eGiant Pumps 22971C Hi-Flow Unloader Valve (Part #4464)\u003c\/strong\u003e is a genuine OEM replacement pressure-actuated unloader engineered for \u003cstrong data-start=\"430\" data-end=\"481\"\u003ehigh-volume pressure washer and pumping systems\u003c\/strong\u003e operating up to \u003cstrong data-start=\"498\" data-end=\"510\"\u003e35.7 GPM\u003c\/strong\u003e and \u003cstrong data-start=\"515\" data-end=\"528\"\u003e1,740 PSI\u003c\/strong\u003e. Manufactured by \u003cstrong data-start=\"546\" data-end=\"561\"\u003eGiant Pumps\u003c\/strong\u003e, this heavy-duty unloader is specifically designed for applications requiring exceptional flow capacity while maintaining reliable pressure regulation and pump protection.\u003c\/p\u003e\n\u003chr data-start=\"1419\" data-end=\"1422\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1424\" data-end=\"1450\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1452\" data-end=\"1979\"\u003e\n\u003cli data-section-id=\"zf8d86\" data-start=\"1452\" data-end=\"1504\"\u003eGenuine Giant Pumps OEM replacement unloader valve\u003c\/li\u003e\n\u003cli data-section-id=\"1d2ch12\" data-start=\"1505\" data-end=\"1544\"\u003eHigh-flow capacity up to \u003cstrong data-start=\"1532\" data-end=\"1544\"\u003e35.7 GPM\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"13laqmt\" data-start=\"1545\" data-end=\"1590\"\u003eMaximum operating pressure of \u003cstrong data-start=\"1577\" data-end=\"1590\"\u003e1,740 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7b3l7s\" data-start=\"1591\" data-end=\"1627\"\u003ePressure-actuated bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1s8k8a5\" data-start=\"1628\" data-end=\"1657\"\u003eYellow spring configuration\u003c\/li\u003e\n\u003cli data-section-id=\"71ai47\" data-start=\"1658\" data-end=\"1709\"\u003eHeavy-duty commercial and industrial construction\u003c\/li\u003e\n\u003cli data-section-id=\"1tzc7f5\" data-start=\"1710\" data-end=\"1756\"\u003eProtects pumps from damaging pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1ba4eai\" data-start=\"1757\" data-end=\"1798\"\u003eMaintains consistent operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1vid4jp\" data-start=\"1799\" data-end=\"1852\"\u003eLarge 3\/4\" port connections for high-volume systems\u003c\/li\u003e\n\u003cli data-section-id=\"2orbya\" data-start=\"1853\" data-end=\"1882\"\u003eReliable bypass performance\u003c\/li\u003e\n\u003cli data-section-id=\"tnpgom\" data-start=\"1883\" data-end=\"1929\"\u003eLong service life under demanding conditions\u003c\/li\u003e\n\u003cli data-section-id=\"1e2qw12\" data-start=\"1930\" data-end=\"1979\"\u003eIdeal for continuous-duty cleaning applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1981\" data-end=\"1984\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1986\" data-end=\"2013\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2015\" data-end=\"2036\"\u003e\u003cstrong data-start=\"2015\" data-end=\"2031\"\u003ePart Number:\u003c\/strong\u003e 4464\u003c\/p\u003e\n\u003cp data-start=\"2038\" data-end=\"2067\"\u003e\u003cstrong data-start=\"2038\" data-end=\"2055\"\u003eManufacturer:\u003c\/strong\u003e Giant Pumps\u003c\/p\u003e\n\u003cp data-start=\"2069\" data-end=\"2086\"\u003e\u003cstrong data-start=\"2069\" data-end=\"2079\"\u003eModel:\u003c\/strong\u003e 22971C\u003c\/p\u003e\n\u003cp data-start=\"2088\" data-end=\"2138\"\u003e\u003cstrong data-start=\"2088\" data-end=\"2105\"\u003eProduct Type:\u003c\/strong\u003e Pressure Actuated Unloader Valve\u003c\/p\u003e\n\u003cp data-start=\"2140\" data-end=\"2171\"\u003e\u003cstrong data-start=\"2140\" data-end=\"2162\"\u003eMaximum Flow Rate:\u003c\/strong\u003e 35.7 GPM\u003c\/p\u003e\n\u003cp data-start=\"2173\" data-end=\"2204\"\u003e\u003cstrong data-start=\"2173\" data-end=\"2194\"\u003eMaximum Pressure:\u003c\/strong\u003e 1,740 PSI\u003c\/p\u003e\n\u003cp data-start=\"2206\" data-end=\"2236\"\u003e\u003cstrong data-start=\"2206\" data-end=\"2230\"\u003eMaximum Temperature:\u003c\/strong\u003e 160°F\u003c\/p\u003e\n\u003cp data-start=\"2238\" data-end=\"2268\"\u003e\u003cstrong data-start=\"2238\" data-end=\"2259\"\u003eInlet Connection:\u003c\/strong\u003e 3\/4\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2270\" data-end=\"2301\"\u003e\u003cstrong data-start=\"2270\" data-end=\"2292\"\u003eOutlet Connection:\u003c\/strong\u003e 3\/4\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2303\" data-end=\"2334\"\u003e\u003cstrong data-start=\"2303\" data-end=\"2325\"\u003eBypass Connection:\u003c\/strong\u003e 3\/4\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2336\" data-end=\"2360\"\u003e\u003cstrong data-start=\"2336\" data-end=\"2353\"\u003eSpring Color:\u003c\/strong\u003e Yellow\u003c\/p\u003e\n\u003cp data-start=\"2362\" data-end=\"2399\"\u003e\u003cstrong data-start=\"2362\" data-end=\"2381\"\u003eOperation Type:\u003c\/strong\u003e Pressure Actuated\u003c\/p\u003e\n\u003cp data-start=\"2401\" data-end=\"2425\"\u003e\u003cstrong data-start=\"2401\" data-end=\"2421\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2427\" data-end=\"2430\"\u003e\n\u003ch2 data-section-id=\"1aac3xw\" data-start=\"2432\" data-end=\"2457\"\u003eHow the Unloader Works\u003c\/h2\u003e\n\u003cp data-start=\"2459\" data-end=\"2534\"\u003eThe 22971C automatically regulates pressure throughout the cleaning system.\u003c\/p\u003e\n\u003cp data-start=\"2536\" data-end=\"2586\"\u003eWhen the discharge valve or trigger gun is closed:\u003c\/p\u003e\n\u003cul data-start=\"2588\" data-end=\"2782\"\u003e\n\u003cli data-section-id=\"1vxqplw\" data-start=\"2588\" data-end=\"2623\"\u003eSystem pressure rapidly increases\u003c\/li\u003e\n\u003cli data-section-id=\"1l4c8ll\" data-start=\"2624\" data-end=\"2664\"\u003eThe internal unloader piston activates\u003c\/li\u003e\n\u003cli data-section-id=\"1dvm6ua\" data-start=\"2665\" data-end=\"2708\"\u003eWater is diverted into the bypass circuit\u003c\/li\u003e\n\u003cli data-section-id=\"13p4p2c\" data-start=\"2709\" data-end=\"2739\"\u003ePressure buildup is relieved\u003c\/li\u003e\n\u003cli data-section-id=\"1wtb6fm\" data-start=\"2740\" data-end=\"2782\"\u003eThe pump remains protected from overload\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2784\" data-end=\"2802\"\u003eWhen flow resumes:\u003c\/p\u003e\n\u003cul data-start=\"2804\" data-end=\"2929\"\u003e\n\u003cli data-section-id=\"1eanjgp\" data-start=\"2804\" data-end=\"2849\"\u003eWater is redirected to the discharge outlet\u003c\/li\u003e\n\u003cli data-section-id=\"vaikfp\" data-start=\"2850\" data-end=\"2887\"\u003eFull operating pressure is restored\u003c\/li\u003e\n\u003cli data-section-id=\"775ags\" data-start=\"2888\" data-end=\"2929\"\u003eCleaning continues without interruption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2931\" data-end=\"3036\"\u003eThis automatic operation helps maximize equipment reliability while minimizing wear on system components.\u003c\/p\u003e\n\u003chr data-start=\"3038\" data-end=\"3041\"\u003e\n\u003ch2 data-section-id=\"k3nz8q\" data-start=\"3043\" data-end=\"3076\"\u003eDesigned for High-Flow Systems\u003c\/h2\u003e\n\u003cp data-start=\"3078\" data-end=\"3182\"\u003eWith a \u003cstrong data-start=\"3085\" data-end=\"3097\"\u003e35.7 GPM\u003c\/strong\u003e maximum flow capacity, the 22971C is ideal for large-volume applications, including:\u003c\/p\u003e\n\u003cul data-start=\"3184\" data-end=\"3434\"\u003e\n\u003cli data-section-id=\"10pt3xi\" data-start=\"3184\" data-end=\"3220\"\u003eIndustrial pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"tgdgwk\" data-start=\"3221\" data-end=\"3246\"\u003eMulti-gun wash stations\u003c\/li\u003e\n\u003cli data-section-id=\"6j4sqw\" data-start=\"3247\" data-end=\"3280\"\u003eFleet and truck wash facilities\u003c\/li\u003e\n\u003cli data-section-id=\"mjfxu2\" data-start=\"3281\" data-end=\"3308\"\u003eAgricultural wash systems\u003c\/li\u003e\n\u003cli data-section-id=\"1qhs68e\" data-start=\"3309\" data-end=\"3345\"\u003eFood processing equipment cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"1i0u86j\" data-start=\"3346\" data-end=\"3372\"\u003eManufacturing facilities\u003c\/li\u003e\n\u003cli data-section-id=\"7jh1sn\" data-start=\"3373\" data-end=\"3406\"\u003eMunicipal maintenance equipment\u003c\/li\u003e\n\u003cli data-section-id=\"14u5bc5\" data-start=\"3407\" data-end=\"3434\"\u003eHeavy equipment wash bays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3436\" data-end=\"3439\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"3441\" data-end=\"3464\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"3466\" data-end=\"3693\"\u003e\n\u003cli data-section-id=\"1bl7wox\" data-start=\"3466\" data-end=\"3496\"\u003eReliable pressure regulation\u003c\/li\u003e\n\u003cli data-section-id=\"1nzrik5\" data-start=\"3497\" data-end=\"3522\"\u003eSmooth bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"elm3ry\" data-start=\"3523\" data-end=\"3550\"\u003eHigh-volume flow handling\u003c\/li\u003e\n\u003cli data-section-id=\"1bb2u3x\" data-start=\"3551\" data-end=\"3577\"\u003eImproved pump protection\u003c\/li\u003e\n\u003cli data-section-id=\"1ero2xq\" data-start=\"3578\" data-end=\"3603\"\u003eReduced pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1gpagnp\" data-start=\"3604\" data-end=\"3637\"\u003eConsistent cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"1kjg8fj\" data-start=\"3638\" data-end=\"3667\"\u003eExtended equipment lifespan\u003c\/li\u003e\n\u003cli data-section-id=\"2ks8i6\" data-start=\"3668\" data-end=\"3693\"\u003eLower maintenance costs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3695\" data-end=\"3698\"\u003e\n\u003ch2 data-section-id=\"vx2wyp\" data-start=\"3700\" data-end=\"3722\"\u003eCommon Applications\u003c\/h2\u003e\n\u003ch3 data-section-id=\"cl0b4i\" data-start=\"3724\" data-end=\"3755\"\u003eIndustrial Cleaning Systems\u003c\/h3\u003e\n\u003cp data-start=\"3757\" data-end=\"3767\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-start=\"3769\" data-end=\"3898\"\u003e\n\u003cli data-section-id=\"pq5ogs\" data-start=\"3769\" data-end=\"3791\"\u003eManufacturing plants\u003c\/li\u003e\n\u003cli data-section-id=\"dt6p21\" data-start=\"3792\" data-end=\"3822\"\u003eEquipment wash-down stations\u003c\/li\u003e\n\u003cli data-section-id=\"1ygviu8\" data-start=\"3823\" data-end=\"3846\"\u003eProcessing facilities\u003c\/li\u003e\n\u003cli data-section-id=\"1sbnuaq\" data-start=\"3847\" data-end=\"3873\"\u003eCentralized wash systems\u003c\/li\u003e\n\u003cli data-section-id=\"snqbg6\" data-start=\"3874\" data-end=\"3898\"\u003eProduction maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1m7fp76\" data-start=\"3900\" data-end=\"3931\"\u003eCommercial Pressure Washing\u003c\/h3\u003e\n\u003cp data-start=\"3933\" data-end=\"3946\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul data-start=\"3948\" data-end=\"4082\"\u003e\n\u003cli data-section-id=\"xkh8e3\" data-start=\"3948\" data-end=\"3963\"\u003eFleet washing\u003c\/li\u003e\n\u003cli data-section-id=\"167zffo\" data-start=\"3964\" data-end=\"3990\"\u003eHeavy equipment cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"tb0sal\" data-start=\"3991\" data-end=\"4014\"\u003eTruck wash facilities\u003c\/li\u003e\n\u003cli data-section-id=\"cmqtpi\" data-start=\"4015\" data-end=\"4051\"\u003eAgricultural equipment maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"lx5i2j\" data-start=\"4052\" data-end=\"4082\"\u003eMunicipal service operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4084\" data-end=\"4087\"\u003e\n\u003ch2 data-section-id=\"x2tt67\" data-start=\"4089\" data-end=\"4133\"\u003eSigns an Unloader Valve Needs Replacement\u003c\/h2\u003e\n\u003cp data-start=\"4135\" data-end=\"4181\"\u003eInspect or replace the unloader if you notice:\u003c\/p\u003e\n\u003cul data-start=\"4183\" data-end=\"4380\"\u003e\n\u003cli data-section-id=\"zta6im\" data-start=\"4183\" data-end=\"4206\"\u003ePressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"ldy9cv\" data-start=\"4207\" data-end=\"4237\"\u003eWater leaks around the valve\u003c\/li\u003e\n\u003cli data-section-id=\"zu24k4\" data-start=\"4238\" data-end=\"4266\"\u003eReduced operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1vz4ts\" data-start=\"4267\" data-end=\"4298\"\u003eInconsistent bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"66ilga\" data-start=\"4299\" data-end=\"4326\"\u003eDelayed pressure response\u003c\/li\u003e\n\u003cli data-section-id=\"wk4w4r\" data-start=\"4327\" data-end=\"4355\"\u003eInternal wear or corrosion\u003c\/li\u003e\n\u003cli data-section-id=\"rsd6zo\" data-start=\"4356\" data-end=\"4380\"\u003eExcessive pump cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4382\" data-end=\"4385\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"4387\" data-end=\"4408\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"4410\" data-end=\"4791\"\u003e\n\u003cli data-section-id=\"1gvthsq\" data-start=\"4410\" data-end=\"4477\"\u003eVerify compatibility with system flow and pressure requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"g9gxon\" data-start=\"4478\" data-end=\"4549\"\u003eInstall using the proper thread sealant on all threaded connections.\u003c\/li\u003e\n\u003cli data-section-id=\"artpak\" data-start=\"4550\" data-end=\"4596\"\u003eEnsure bypass plumbing is correctly routed.\u003c\/li\u003e\n\u003cli data-section-id=\"18mc05i\" data-start=\"4597\" data-end=\"4636\"\u003eInspect all fittings before startup.\u003c\/li\u003e\n\u003cli data-section-id=\"w8omez\" data-start=\"4637\" data-end=\"4705\"\u003eTest pressure regulation and bypass operation after installation.\u003c\/li\u003e\n\u003cli data-section-id=\"4771lz\" data-start=\"4706\" data-end=\"4791\"\u003eVerify that all system components are rated for the intended operating conditions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4793\" data-end=\"4967\"\u003e\u003cstrong data-start=\"4793\" data-end=\"4807\"\u003eImportant:\u003c\/strong\u003e This unloader is designed for high-flow systems. Ensure the pump, plumbing, hoses, and accessories are properly sized to accommodate the maximum flow capacity.\u003c\/p\u003e\n\u003chr data-start=\"4969\" data-end=\"4972\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4974\" data-end=\"5004\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"5006\" data-end=\"5317\"\u003e\n\u003cli data-section-id=\"8e7fsu\" data-start=\"5006\" data-end=\"5045\"\u003eInspect regularly for leaks and wear.\u003c\/li\u003e\n\u003cli data-section-id=\"1jiffy3\" data-start=\"5046\" data-end=\"5108\"\u003eVerify proper bypass operation during scheduled maintenance.\u003c\/li\u003e\n\u003cli data-section-id=\"jd9knh\" data-start=\"5109\" data-end=\"5149\"\u003eMaintain clean inlet water filtration.\u003c\/li\u003e\n\u003cli data-section-id=\"1rklumh\" data-start=\"5150\" data-end=\"5203\"\u003eMonitor system pressure for consistent performance.\u003c\/li\u003e\n\u003cli data-section-id=\"a8f7cd\" data-start=\"5204\" data-end=\"5261\"\u003eReplace worn seals and internal components as required.\u003c\/li\u003e\n\u003cli data-section-id=\"11ofez1\" data-start=\"5262\" data-end=\"5317\"\u003eFollow Giant Pumps recommended maintenance intervals.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Giant","offers":[{"title":"Default Title","offer_id":53431333552491,"sku":null,"price":499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/22971CUNLOADERHI-FLOW.jpg?v=1782603741","url":"https:\/\/generalsprayers.com\/products\/22971c-hi-flow-pressure-washer-unloader-valve-35-7-gpm-1740-psi-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}