{"product_id":"k3-0-pressure-washer-unloader-valve-2-1-3-0-gpm-400-1450-psi-oem-replacement-part","title":"K3.0 Pressure Washer Unloader Valve 2.1–3.0 GPM 400–1450 PSI – OEM Replacement Part","description":"\u003cp data-start=\"0\" data-end=\"170\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 1593\u003cbr data-start=\"21\" data-end=\"24\"\u003e\u003cstrong data-start=\"24\" data-end=\"37\"\u003eCategory:\u003c\/strong\u003e Pressure Washer Parts → Unloader Valves → Flow Actuated Unloader Valves\u003cbr data-start=\"109\" data-end=\"112\"\u003e\u003cstrong data-start=\"112\" data-end=\"121\"\u003eType:\u003c\/strong\u003e General Pump K3.0 Pressure Washer Unloader Valve\u003c\/p\u003e\n\u003chr data-start=\"172\" data-end=\"175\"\u003e\n\u003cp data-start=\"270\" data-end=\"785\"\u003eThe \u003cstrong data-start=\"274\" data-end=\"339\"\u003eGeneral Pump K3.0 Pressure Washer Unloader Valve (Part #1593)\u003c\/strong\u003e is a genuine OEM replacement \u003cstrong data-start=\"369\" data-end=\"401\"\u003eflow-actuated unloader valve\u003c\/strong\u003e designed for commercial, residential, and light industrial pressure washer systems operating between \u003cstrong data-start=\"503\" data-end=\"522\"\u003e2.1 and 3.0 GPM\u003c\/strong\u003e with adjustable pressures from \u003cstrong data-start=\"554\" data-end=\"574\"\u003e400 to 1,450 PSI\u003c\/strong\u003e. Manufactured by \u003cstrong data-start=\"592\" data-end=\"608\"\u003eGeneral Pump\u003c\/strong\u003e, the K3.0 features a balanced piston design that delivers smooth pressure regulation, reliable bypass operation, and superior protection for pumps and high-pressure components.\u003c\/p\u003e\n\u003chr data-start=\"1536\" data-end=\"1539\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1541\" data-end=\"1567\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1569\" data-end=\"2115\"\u003e\n\u003cli data-section-id=\"1yufexy\" data-start=\"1569\" data-end=\"1622\"\u003eGenuine General Pump OEM replacement unloader valve\u003c\/li\u003e\n\u003cli data-section-id=\"1f1fr4f\" data-start=\"1623\" data-end=\"1661\"\u003eFlow-actuated balanced piston design\u003c\/li\u003e\n\u003cli data-section-id=\"1qhftuo\" data-start=\"1662\" data-end=\"1716\"\u003eDesigned for \u003cstrong data-start=\"1677\" data-end=\"1692\"\u003e2.1–3.0 GPM\u003c\/strong\u003e pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"1eswghe\" data-start=\"1717\" data-end=\"1767\"\u003eAdjustable pressure range from \u003cstrong data-start=\"1750\" data-end=\"1767\"\u003e400–1,450 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2xo3uf\" data-start=\"1768\" data-end=\"1813\"\u003eMaximum operating pressure of \u003cstrong data-start=\"1800\" data-end=\"1813\"\u003e1,450 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gnc41p\" data-start=\"1814\" data-end=\"1868\"\u003eBalanced nozzle technology minimizes pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"klevii\" data-start=\"1869\" data-end=\"1916\"\u003eStainless steel and brass internal components\u003c\/li\u003e\n\u003cli data-section-id=\"1p27ykd\" data-start=\"1917\" data-end=\"1959\"\u003eDual gauge ports for pressure monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"1rg0l6a\" data-start=\"1960\" data-end=\"2017\"\u003eSmooth transition between spraying and bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1sa1x6w\" data-start=\"2018\" data-end=\"2051\"\u003eHelps extend pump and hose life\u003c\/li\u003e\n\u003cli data-section-id=\"168qaul\" data-start=\"2052\" data-end=\"2081\"\u003eCommercial-grade durability\u003c\/li\u003e\n\u003cli data-section-id=\"3iwt53\" data-start=\"2082\" data-end=\"2115\"\u003eOEM-quality fit and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2117\" data-end=\"2120\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"2122\" data-end=\"2149\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2151\" data-end=\"2172\"\u003e\u003cstrong data-start=\"2151\" data-end=\"2167\"\u003ePart Number:\u003c\/strong\u003e 1593\u003c\/p\u003e\n\u003cp data-start=\"2174\" data-end=\"2204\"\u003e\u003cstrong data-start=\"2174\" data-end=\"2191\"\u003eManufacturer:\u003c\/strong\u003e General Pump\u003c\/p\u003e\n\u003cp data-start=\"2206\" data-end=\"2221\"\u003e\u003cstrong data-start=\"2206\" data-end=\"2216\"\u003eModel:\u003c\/strong\u003e K3.0\u003c\/p\u003e\n\u003cp data-start=\"2223\" data-end=\"2269\"\u003e\u003cstrong data-start=\"2223\" data-end=\"2240\"\u003eProduct Type:\u003c\/strong\u003e Flow Actuated Unloader Valve\u003c\/p\u003e\n\u003cp data-start=\"2271\" data-end=\"2298\"\u003e\u003cstrong data-start=\"2271\" data-end=\"2286\"\u003eFlow Range:\u003c\/strong\u003e 2.1–3.0 GPM\u003c\/p\u003e\n\u003cp data-start=\"2300\" data-end=\"2334\"\u003e\u003cstrong data-start=\"2300\" data-end=\"2326\"\u003eMaximum Flow Capacity:\u003c\/strong\u003e 3.0 GPM\u003c\/p\u003e\n\u003cp data-start=\"2336\" data-end=\"2380\"\u003e\u003cstrong data-start=\"2336\" data-end=\"2366\"\u003ePressure Adjustment Range:\u003c\/strong\u003e 400–1,450 PSI\u003c\/p\u003e\n\u003cp data-start=\"2382\" data-end=\"2413\"\u003e\u003cstrong data-start=\"2382\" data-end=\"2403\"\u003eMaximum Pressure:\u003c\/strong\u003e 1,450 PSI\u003c\/p\u003e\n\u003cp data-start=\"2415\" data-end=\"2445\"\u003e\u003cstrong data-start=\"2415\" data-end=\"2439\"\u003eMaximum Temperature:\u003c\/strong\u003e 195°F\u003c\/p\u003e\n\u003cp data-start=\"2447\" data-end=\"2479\"\u003e\u003cstrong data-start=\"2447\" data-end=\"2468\"\u003eInlet Connection:\u003c\/strong\u003e 3\/8\" BSP-F\u003c\/p\u003e\n\u003cp data-start=\"2481\" data-end=\"2514\"\u003e\u003cstrong data-start=\"2481\" data-end=\"2503\"\u003eOutlet Connection:\u003c\/strong\u003e 3\/8\" BSP-M\u003c\/p\u003e\n\u003cp data-start=\"2516\" data-end=\"2549\"\u003e\u003cstrong data-start=\"2516\" data-end=\"2538\"\u003eBypass Connection:\u003c\/strong\u003e 3\/4\" BSP-M\u003c\/p\u003e\n\u003cp data-start=\"2551\" data-end=\"2572\"\u003e\u003cstrong data-start=\"2551\" data-end=\"2567\"\u003eGauge Ports:\u003c\/strong\u003e Dual\u003c\/p\u003e\n\u003cp data-start=\"2574\" data-end=\"2607\"\u003e\u003cstrong data-start=\"2574\" data-end=\"2593\"\u003eOperation Type:\u003c\/strong\u003e Flow Actuated\u003c\/p\u003e\n\u003cp data-start=\"2609\" data-end=\"2633\"\u003e\u003cstrong data-start=\"2609\" data-end=\"2629\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2635\" data-end=\"2638\"\u003e\n\u003ch2 data-section-id=\"1hkt7i0\" data-start=\"2640\" data-end=\"2661\"\u003eHow the K3.0 Works\u003c\/h2\u003e\n\u003cp data-start=\"2663\" data-end=\"2740\"\u003eThe K3.0 regulates pressure using a balanced piston and flow-actuated design.\u003c\/p\u003e\n\u003cp data-start=\"2742\" data-end=\"2769\"\u003eWhen the spray gun is open:\u003c\/p\u003e\n\u003cul data-start=\"2771\" data-end=\"2932\"\u003e\n\u003cli data-section-id=\"17gvr3w\" data-start=\"2771\" data-end=\"2815\"\u003eWater flows normally through the unloader.\u003c\/li\u003e\n\u003cli data-section-id=\"9te9qv\" data-start=\"2816\" data-end=\"2872\"\u003eThe balanced piston remains in the operating position.\u003c\/li\u003e\n\u003cli data-section-id=\"1o9ynhs\" data-start=\"2873\" data-end=\"2932\"\u003eFull operating pressure is delivered to the spray nozzle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2934\" data-end=\"2963\"\u003eWhen the spray gun is closed:\u003c\/p\u003e\n\u003cul data-start=\"2965\" data-end=\"3214\"\u003e\n\u003cli data-section-id=\"1hewgq2\" data-start=\"2965\" data-end=\"2984\"\u003eWater flow stops.\u003c\/li\u003e\n\u003cli data-section-id=\"in7h15\" data-start=\"2985\" data-end=\"3037\"\u003ePressure rises downstream of the internal orifice.\u003c\/li\u003e\n\u003cli data-section-id=\"46fur8\" data-start=\"3038\" data-end=\"3081\"\u003eThe balanced piston shifts automatically.\u003c\/li\u003e\n\u003cli data-section-id=\"n7gl8r\" data-start=\"3082\" data-end=\"3129\"\u003eWater is diverted through the bypass circuit.\u003c\/li\u003e\n\u003cli data-section-id=\"1onoib4\" data-start=\"3130\" data-end=\"3214\"\u003ePressure spikes are minimized, protecting the pump and pressure washer components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3216\" data-end=\"3353\"\u003eThis balanced design provides smoother operation than conventional unloaders while reducing stress throughout the pressure washer system.\u003c\/p\u003e\n\u003chr data-start=\"3355\" data-end=\"3358\"\u003e\n\u003ch2 data-section-id=\"vx2wyp\" data-start=\"3360\" data-end=\"3382\"\u003eCommon Applications\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1pflz4y\" data-start=\"3384\" data-end=\"3429\"\u003eResidential \u0026amp; Commercial Pressure Washers\u003c\/h3\u003e\n\u003cp data-start=\"3431\" data-end=\"3441\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-start=\"3443\" data-end=\"3577\"\u003e\n\u003cli data-section-id=\"xvja5y\" data-start=\"3443\" data-end=\"3473\"\u003eResidential pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"1x2yeeq\" data-start=\"3474\" data-end=\"3508\"\u003ePortable pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"d4mmu5\" data-start=\"3509\" data-end=\"3526\"\u003eVehicle washing\u003c\/li\u003e\n\u003cli data-section-id=\"1hcbv4i\" data-start=\"3527\" data-end=\"3549\"\u003eProperty maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"14dbxr\" data-start=\"3550\" data-end=\"3577\"\u003eLight commercial cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"m9dt0u\" data-start=\"3579\" data-end=\"3612\"\u003eIndustrial Cleaning Equipment\u003c\/h3\u003e\n\u003cp data-start=\"3614\" data-end=\"3627\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul data-start=\"3629\" data-end=\"3772\"\u003e\n\u003cli data-section-id=\"1hsbtdy\" data-start=\"3629\" data-end=\"3654\"\u003eEquipment wash stations\u003c\/li\u003e\n\u003cli data-section-id=\"64g5as\" data-start=\"3655\" data-end=\"3678\"\u003eAgricultural cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"5l5kua\" data-start=\"3679\" data-end=\"3704\"\u003eMaintenance departments\u003c\/li\u003e\n\u003cli data-section-id=\"9sbypv\" data-start=\"3705\" data-end=\"3740\"\u003eSmall industrial cleaning systems\u003c\/li\u003e\n\u003cli data-section-id=\"meedk1\" data-start=\"3741\" data-end=\"3772\"\u003eCustom pressure washer builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3774\" data-end=\"3777\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"3779\" data-end=\"3802\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"3804\" data-end=\"4028\"\u003e\n\u003cli data-section-id=\"13mgugy\" data-start=\"3804\" data-end=\"3833\"\u003ePrecise pressure regulation\u003c\/li\u003e\n\u003cli data-section-id=\"1nzrik5\" data-start=\"3834\" data-end=\"3859\"\u003eSmooth bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1ero2xq\" data-start=\"3860\" data-end=\"3885\"\u003eReduced pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1bb2u3x\" data-start=\"3886\" data-end=\"3912\"\u003eImproved pump protection\u003c\/li\u003e\n\u003cli data-section-id=\"1gpagnp\" data-start=\"3913\" data-end=\"3946\"\u003eConsistent cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"1kjg8fj\" data-start=\"3947\" data-end=\"3976\"\u003eExtended equipment lifespan\u003c\/li\u003e\n\u003cli data-section-id=\"2ks8i6\" data-start=\"3977\" data-end=\"4002\"\u003eLower maintenance costs\u003c\/li\u003e\n\u003cli data-section-id=\"1n877ue\" data-start=\"4003\" data-end=\"4028\"\u003eReliable OEM durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4030\" data-end=\"4033\"\u003e\n\u003ch2 data-section-id=\"x2tt67\" data-start=\"4035\" data-end=\"4079\"\u003eSigns an Unloader Valve Needs Replacement\u003c\/h2\u003e\n\u003cp data-start=\"4081\" data-end=\"4127\"\u003eInspect or replace the unloader if you notice:\u003c\/p\u003e\n\u003cul data-start=\"4129\" data-end=\"4330\"\u003e\n\u003cli data-section-id=\"zta6im\" data-start=\"4129\" data-end=\"4152\"\u003ePressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"irubn0\" data-start=\"4153\" data-end=\"4180\"\u003eReduced cleaning pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1g7kb8v\" data-start=\"4181\" data-end=\"4213\"\u003eWater leakage around the valve\u003c\/li\u003e\n\u003cli data-section-id=\"op63ib\" data-start=\"4214\" data-end=\"4245\"\u003eDifficulty adjusting pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1vz4ts\" data-start=\"4246\" data-end=\"4277\"\u003eInconsistent bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1n6rxvr\" data-start=\"4278\" data-end=\"4304\"\u003eDelayed trigger response\u003c\/li\u003e\n\u003cli data-section-id=\"16xn7rj\" data-start=\"4305\" data-end=\"4330\"\u003eExcessive internal wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4332\" data-end=\"4335\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"4337\" data-end=\"4358\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"4360\" data-end=\"4812\"\u003e\n\u003cli data-section-id=\"oso8v3\" data-start=\"4360\" data-end=\"4434\"\u003eVerify compatibility with your system's flow and pressure requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"g43vau\" data-start=\"4435\" data-end=\"4500\"\u003eInstall using the appropriate BSP fittings and thread sealant.\u003c\/li\u003e\n\u003cli data-section-id=\"1q33z2i\" data-start=\"4501\" data-end=\"4597\"\u003eConnect the inlet, outlet, and bypass ports according to the pressure washer plumbing layout.\u003c\/li\u003e\n\u003cli data-section-id=\"eiytn6\" data-start=\"4598\" data-end=\"4684\"\u003eInstall a pressure gauge using one of the dual gauge ports for accurate adjustment.\u003c\/li\u003e\n\u003cli data-section-id=\"lnumsj\" data-start=\"4685\" data-end=\"4749\"\u003eSet the operating pressure using a calibrated pressure gauge.\u003c\/li\u003e\n\u003cli data-section-id=\"fp39ip\" data-start=\"4750\" data-end=\"4812\"\u003eMaintain a \u003cstrong data-start=\"4764\" data-end=\"4790\"\u003eminimum 5% bypass flow\u003c\/strong\u003e for proper operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4814\" data-end=\"5010\"\u003e\u003cstrong data-start=\"4814\" data-end=\"4828\"\u003eImportant:\u003c\/strong\u003e Ensure all pressure washer components—including pumps, hoses, spray guns, fittings, and nozzles—are rated for the intended operating pressure before placing the system into service.\u003c\/p\u003e\n\u003chr data-start=\"5012\" data-end=\"5015\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"5017\" data-end=\"5047\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"5049\" data-end=\"5374\"\u003e\n\u003cli data-section-id=\"vakiz1\" data-start=\"5049\" data-end=\"5101\"\u003eInspect the unloader regularly for leaks and wear.\u003c\/li\u003e\n\u003cli data-section-id=\"1bk99f5\" data-start=\"5102\" data-end=\"5156\"\u003eVerify pressure settings during routine maintenance.\u003c\/li\u003e\n\u003cli data-section-id=\"q3d7yn\" data-start=\"5157\" data-end=\"5193\"\u003eKeep inlet water filtration clean.\u003c\/li\u003e\n\u003cli data-section-id=\"1vqtz4t\" data-start=\"5194\" data-end=\"5241\"\u003eMaintain the recommended minimum bypass flow.\u003c\/li\u003e\n\u003cli data-section-id=\"1fv3cus\" data-start=\"5242\" data-end=\"5317\"\u003eReplace worn seals and internal components using genuine OEM repair kits.\u003c\/li\u003e\n\u003cli data-section-id=\"14cgjbx\" data-start=\"5318\" data-end=\"5374\"\u003eFollow General Pump recommended maintenance intervals.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Pump","offers":[{"title":"Default Title","offer_id":53433519047019,"sku":null,"price":135.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/K3.0UNLOADER.webp?v=1782700662","url":"https:\/\/generalsprayers.com\/products\/k3-0-pressure-washer-unloader-valve-2-1-3-0-gpm-400-1450-psi-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}