{"product_id":"pa-vb3ka-pressure-washer-unloader-valve-6-5-gpm-adjustable-323-psi-to-3650-psi-oem-replacement-part","title":"PA VB3KA Pressure Washer Unloader Valve 6.5 GPM Adjustable 323 PSI to 3650 PSI – OEM Replacement Part","description":"\u003cp data-start=\"0\" data-end=\"166\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 4107\u003cbr data-start=\"21\" data-end=\"24\"\u003e\u003cstrong data-start=\"24\" data-end=\"37\"\u003eCategory:\u003c\/strong\u003e Pressure Washer Parts → Unloader Valves → Pressure Actuated Unloader Valves\u003cbr data-start=\"113\" data-end=\"116\"\u003e\u003cstrong data-start=\"116\" data-end=\"125\"\u003eType:\u003c\/strong\u003e PA YVB3KA Pressure Washer Unloader Valve\u003c\/p\u003e\n\u003chr data-start=\"168\" data-end=\"171\"\u003e\n\u003cp data-start=\"284\" data-end=\"731\"\u003eThe \u003cstrong data-start=\"288\" data-end=\"345\"\u003ePA YVB3KA Pressure Washer Unloader Valve (Part #4107)\u003c\/strong\u003e is a premium OEM replacement pressure-actuated unloader designed to deliver reliable pressure regulation, pump protection, and adjustable operating performance for commercial and industrial pressure washer systems. Manufactured by \u003cstrong data-start=\"577\" data-end=\"595\"\u003ePA (PA S.p.A.)\u003c\/strong\u003e, this versatile unloader features an adjustable pressure range from \u003cstrong data-start=\"664\" data-end=\"688\"\u003e323 PSI to 3,650 PSI\u003c\/strong\u003e and supports flow rates up to \u003cstrong data-start=\"719\" data-end=\"730\"\u003e6.5 GPM\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1306\" data-end=\"1309\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1311\" data-end=\"1337\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1339\" data-end=\"1821\"\u003e\n\u003cli data-section-id=\"18wuel5\" data-start=\"1339\" data-end=\"1382\"\u003eGenuine PA OEM replacement unloader valve\u003c\/li\u003e\n\u003cli data-section-id=\"7b3l7s\" data-start=\"1383\" data-end=\"1419\"\u003ePressure-actuated bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"ezj6ra\" data-start=\"1420\" data-end=\"1473\"\u003eAdjustable pressure range from 323 PSI to 3,650 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"833lke\" data-start=\"1474\" data-end=\"1504\"\u003eRated for up to 6.5 GPM flow\u003c\/li\u003e\n\u003cli data-section-id=\"1ibnmt6\" data-start=\"1505\" data-end=\"1561\"\u003eAutomatic bypass function when trigger gun is released\u003c\/li\u003e\n\u003cli data-section-id=\"1gq61rn\" data-start=\"1562\" data-end=\"1609\"\u003eProtects pumps and pressure washer components\u003c\/li\u003e\n\u003cli data-section-id=\"1oo2nhy\" data-start=\"1610\" data-end=\"1649\"\u003eHelps reduce damaging pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1051dux\" data-start=\"1650\" data-end=\"1692\"\u003eSupports consistent cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"7dzq54\" data-start=\"1693\" data-end=\"1732\"\u003eDurable commercial-grade construction\u003c\/li\u003e\n\u003cli data-section-id=\"ik6uil\" data-start=\"1733\" data-end=\"1774\"\u003eSuitable for hot and cold water systems\u003c\/li\u003e\n\u003cli data-section-id=\"19dn9u4\" data-start=\"1775\" data-end=\"1801\"\u003eEasy pressure adjustment\u003c\/li\u003e\n\u003cli data-section-id=\"1wdzf4p\" data-start=\"1802\" data-end=\"1821\"\u003eLong service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1823\" data-end=\"1826\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1828\" data-end=\"1855\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1857\" data-end=\"1878\"\u003e\u003cstrong data-start=\"1857\" data-end=\"1873\"\u003ePart Number:\u003c\/strong\u003e 4107\u003c\/p\u003e\n\u003cp data-start=\"1880\" data-end=\"1900\"\u003e\u003cstrong data-start=\"1880\" data-end=\"1897\"\u003eManufacturer:\u003c\/strong\u003e PA\u003c\/p\u003e\n\u003cp data-start=\"1902\" data-end=\"1919\"\u003e\u003cstrong data-start=\"1902\" data-end=\"1912\"\u003eModel:\u003c\/strong\u003e YVB3KA\u003c\/p\u003e\n\u003cp data-start=\"1921\" data-end=\"1969\"\u003e\u003cstrong data-start=\"1921\" data-end=\"1938\"\u003eProduct Type:\u003c\/strong\u003e Pressure Washer Unloader Valve\u003c\/p\u003e\n\u003cp data-start=\"1971\" data-end=\"2001\"\u003e\u003cstrong data-start=\"1971\" data-end=\"1993\"\u003eMaximum Flow Rate:\u003c\/strong\u003e 6.5 GPM\u003c\/p\u003e\n\u003cp data-start=\"2003\" data-end=\"2053\"\u003e\u003cstrong data-start=\"2003\" data-end=\"2033\"\u003ePressure Adjustment Range:\u003c\/strong\u003e 323 PSI – 3,650 PSI\u003c\/p\u003e\n\u003cp data-start=\"2055\" data-end=\"2086\"\u003e\u003cstrong data-start=\"2055\" data-end=\"2076\"\u003eMaximum Pressure:\u003c\/strong\u003e 3,650 PSI\u003c\/p\u003e\n\u003cp data-start=\"2088\" data-end=\"2118\"\u003e\u003cstrong data-start=\"2088\" data-end=\"2112\"\u003eMaximum Temperature:\u003c\/strong\u003e 195°F\u003c\/p\u003e\n\u003cp data-start=\"2120\" data-end=\"2150\"\u003e\u003cstrong data-start=\"2120\" data-end=\"2141\"\u003eInlet Connection:\u003c\/strong\u003e 3\/8\" MPT\u003c\/p\u003e\n\u003cp data-start=\"2152\" data-end=\"2183\"\u003e\u003cstrong data-start=\"2152\" data-end=\"2174\"\u003eOutlet Connection:\u003c\/strong\u003e 3\/8\" MPT\u003c\/p\u003e\n\u003cp data-start=\"2185\" data-end=\"2216\"\u003e\u003cstrong data-start=\"2185\" data-end=\"2207\"\u003eBypass Connection:\u003c\/strong\u003e 3\/8\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2218\" data-end=\"2254\"\u003e\u003cstrong data-start=\"2218\" data-end=\"2236\"\u003eUnloader Type:\u003c\/strong\u003e Pressure Actuated\u003c\/p\u003e\n\u003cp data-start=\"2256\" data-end=\"2280\"\u003e\u003cstrong data-start=\"2256\" data-end=\"2276\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2282\" data-end=\"2285\"\u003e\n\u003ch2 data-section-id=\"1jw1t9r\" data-start=\"2287\" data-end=\"2321\"\u003eAdjustable Pressure Performance\u003c\/h2\u003e\n\u003cp data-start=\"2323\" data-end=\"2388\"\u003eThe YVB3KA offers a wide adjustment range, allowing operators to:\u003c\/p\u003e\n\u003cul data-start=\"2390\" data-end=\"2603\"\u003e\n\u003cli data-section-id=\"v4yjuz\" data-start=\"2390\" data-end=\"2419\"\u003eFine-tune cleaning pressure\u003c\/li\u003e\n\u003cli data-section-id=\"qrcw5w\" data-start=\"2420\" data-end=\"2471\"\u003eMatch system performance to specific applications\u003c\/li\u003e\n\u003cli data-section-id=\"1g3becw\" data-start=\"2472\" data-end=\"2532\"\u003eReduce wear on equipment when lower pressure is sufficient\u003c\/li\u003e\n\u003cli data-section-id=\"1p2hy1s\" data-start=\"2533\" data-end=\"2562\"\u003eImprove cleaning efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"nw45sd\" data-start=\"2563\" data-end=\"2603\"\u003eAdapt to changing operating conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2605\" data-end=\"2722\"\u003eThis flexibility makes the valve suitable for a wide range of residential, commercial, and industrial cleaning tasks.\u003c\/p\u003e\n\u003chr data-start=\"2724\" data-end=\"2727\"\u003e\n\u003ch2 data-section-id=\"1kehdxb\" data-start=\"2729\" data-end=\"2759\"\u003eWhat an Unloader Valve Does\u003c\/h2\u003e\n\u003cp data-start=\"2761\" data-end=\"2799\"\u003eThe unloader valve is responsible for:\u003c\/p\u003e\n\u003cul data-start=\"2801\" data-end=\"3037\"\u003e\n\u003cli data-section-id=\"1pfj4mk\" data-start=\"2801\" data-end=\"2832\"\u003eRegulating operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"10qq8f4\" data-start=\"2833\" data-end=\"2898\"\u003eDiverting water flow into bypass when the trigger gun is closed\u003c\/li\u003e\n\u003cli data-section-id=\"105avs2\" data-start=\"2899\" data-end=\"2942\"\u003eProtecting the pump from pressure buildup\u003c\/li\u003e\n\u003cli data-section-id=\"wasrsj\" data-start=\"2943\" data-end=\"2984\"\u003eReducing stress on hoses and spray guns\u003c\/li\u003e\n\u003cli data-section-id=\"b4yi0e\" data-start=\"2985\" data-end=\"3010\"\u003eImproving system safety\u003c\/li\u003e\n\u003cli data-section-id=\"1vawle\" data-start=\"3011\" data-end=\"3037\"\u003eExtending equipment life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3039\" data-end=\"3143\"\u003eWhen the trigger gun is released, water is redirected through the bypass circuit until cleaning resumes.\u003c\/p\u003e\n\u003chr data-start=\"3145\" data-end=\"3148\"\u003e\n\u003ch2 data-section-id=\"vx2wyp\" data-start=\"3150\" data-end=\"3172\"\u003eCommon Applications\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1m7fp76\" data-start=\"3174\" data-end=\"3205\"\u003eCommercial Pressure Washing\u003c\/h3\u003e\n\u003cp data-start=\"3207\" data-end=\"3217\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-start=\"3219\" data-end=\"3371\"\u003e\n\u003cli data-section-id=\"yt07qn\" data-start=\"3219\" data-end=\"3249\"\u003eMobile pressure washing rigs\u003c\/li\u003e\n\u003cli data-section-id=\"tw9796\" data-start=\"3250\" data-end=\"3285\"\u003eProfessional cleaning contractors\u003c\/li\u003e\n\u003cli data-section-id=\"1hb3h7x\" data-start=\"3286\" data-end=\"3309\"\u003eFleet washing systems\u003c\/li\u003e\n\u003cli data-section-id=\"1hkm1a0\" data-start=\"3310\" data-end=\"3342\"\u003eProperty maintenance equipment\u003c\/li\u003e\n\u003cli data-section-id=\"1q5rf75\" data-start=\"3343\" data-end=\"3371\"\u003eBuilding exterior cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"cl0b4i\" data-start=\"3373\" data-end=\"3404\"\u003eIndustrial Cleaning Systems\u003c\/h3\u003e\n\u003cp data-start=\"3406\" data-end=\"3419\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul data-start=\"3421\" data-end=\"3577\"\u003e\n\u003cli data-section-id=\"dt6p21\" data-start=\"3421\" data-end=\"3451\"\u003eEquipment wash-down stations\u003c\/li\u003e\n\u003cli data-section-id=\"1i0u86j\" data-start=\"3452\" data-end=\"3478\"\u003eManufacturing facilities\u003c\/li\u003e\n\u003cli data-section-id=\"19uyz1u\" data-start=\"3479\" data-end=\"3513\"\u003eAgricultural cleaning operations\u003c\/li\u003e\n\u003cli data-section-id=\"b5ztl1\" data-start=\"3514\" data-end=\"3550\"\u003eIndustrial maintenance departments\u003c\/li\u003e\n\u003cli data-section-id=\"194071w\" data-start=\"3551\" data-end=\"3577\"\u003eService and repair shops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"6j53bi\" data-start=\"3579\" data-end=\"3616\"\u003eHot \u0026amp; Cold Water Pressure Washers\u003c\/h3\u003e\n\u003cp data-start=\"3618\" data-end=\"3634\"\u003eCompatible with:\u003c\/p\u003e\n\u003cul data-start=\"3636\" data-end=\"3780\"\u003e\n\u003cli data-section-id=\"g7mqf6\" data-start=\"3636\" data-end=\"3664\"\u003eHot water pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"1l5zndh\" data-start=\"3665\" data-end=\"3694\"\u003eCold water pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"17gf3sa\" data-start=\"3695\" data-end=\"3717\"\u003eSkid-mounted systems\u003c\/li\u003e\n\u003cli data-section-id=\"111nmdm\" data-start=\"3718\" data-end=\"3743\"\u003eTrailer-mounted systems\u003c\/li\u003e\n\u003cli data-section-id=\"1quwlh6\" data-start=\"3744\" data-end=\"3780\"\u003eCustom-built pressure washer units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3782\" data-end=\"3785\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"3787\" data-end=\"3810\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"3812\" data-end=\"4048\"\u003e\n\u003cli data-section-id=\"1bl7wox\" data-start=\"3812\" data-end=\"3842\"\u003eReliable pressure regulation\u003c\/li\u003e\n\u003cli data-section-id=\"1h8h6yq\" data-start=\"3843\" data-end=\"3876\"\u003eAdjustable cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"1bb2u3x\" data-start=\"3877\" data-end=\"3903\"\u003eImproved pump protection\u003c\/li\u003e\n\u003cli data-section-id=\"1ero2xq\" data-start=\"3904\" data-end=\"3929\"\u003eReduced pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1n9g3io\" data-start=\"3930\" data-end=\"3961\"\u003eConsistent operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1kjg8fj\" data-start=\"3962\" data-end=\"3991\"\u003eExtended equipment lifespan\u003c\/li\u003e\n\u003cli data-section-id=\"1fswne1\" data-start=\"3992\" data-end=\"4019\"\u003eReduced maintenance costs\u003c\/li\u003e\n\u003cli data-section-id=\"104vb9g\" data-start=\"4020\" data-end=\"4048\"\u003eCommercial-duty durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4050\" data-end=\"4053\"\u003e\n\u003ch2 data-section-id=\"x2tt67\" data-start=\"4055\" data-end=\"4099\"\u003eSigns an Unloader Valve Needs Replacement\u003c\/h2\u003e\n\u003cp data-start=\"4101\" data-end=\"4133\"\u003eReplace the valve if you notice:\u003c\/p\u003e\n\u003cul data-start=\"4135\" data-end=\"4360\"\u003e\n\u003cli data-section-id=\"zta6im\" data-start=\"4135\" data-end=\"4158\"\u003ePressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"7x7ebz\" data-start=\"4159\" data-end=\"4194\"\u003eWater leaks around the valve body\u003c\/li\u003e\n\u003cli data-section-id=\"op63ib\" data-start=\"4195\" data-end=\"4226\"\u003eDifficulty adjusting pressure\u003c\/li\u003e\n\u003cli data-section-id=\"uz2anl\" data-start=\"4227\" data-end=\"4250\"\u003eExcessive bypass flow\u003c\/li\u003e\n\u003cli data-section-id=\"1n1a9ox\" data-start=\"4251\" data-end=\"4281\"\u003eReduced cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"16eqa1l\" data-start=\"4282\" data-end=\"4307\"\u003eTrigger response issues\u003c\/li\u003e\n\u003cli data-section-id=\"wk4w4r\" data-start=\"4308\" data-end=\"4336\"\u003eInternal wear or corrosion\u003c\/li\u003e\n\u003cli data-section-id=\"d4j17h\" data-start=\"4337\" data-end=\"4360\"\u003ePump cycling problems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4362\" data-end=\"4365\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"4367\" data-end=\"4388\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"4390\" data-end=\"4789\"\u003e\n\u003cli data-section-id=\"1xqzeet\" data-start=\"4390\" data-end=\"4451\"\u003eShut down the pressure washer and relieve system pressure.\u003c\/li\u003e\n\u003cli data-section-id=\"13m8l09\" data-start=\"4452\" data-end=\"4519\"\u003eVerify compatibility with system flow and pressure requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"l7kpdd\" data-start=\"4520\" data-end=\"4566\"\u003eInstall using the proper threaded fittings.\u003c\/li\u003e\n\u003cli data-section-id=\"13x5u69\" data-start=\"4567\" data-end=\"4609\"\u003eApply thread sealant where appropriate.\u003c\/li\u003e\n\u003cli data-section-id=\"1nb3xm7\" data-start=\"4610\" data-end=\"4667\"\u003eAdjust pressure according to equipment specifications.\u003c\/li\u003e\n\u003cli data-section-id=\"1oxwt74\" data-start=\"4668\" data-end=\"4714\"\u003eTest for leaks and proper bypass operation.\u003c\/li\u003e\n\u003cli data-section-id=\"oucxin\" data-start=\"4715\" data-end=\"4789\"\u003eVerify stable operating pressure before returning equipment to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4791\" data-end=\"4918\"\u003e\u003cstrong data-start=\"4791\" data-end=\"4805\"\u003eImportant:\u003c\/strong\u003e Always ensure that pumps, hoses, spray guns, and fittings are properly rated for the desired operating pressure.\u003c\/p\u003e\n\u003chr data-start=\"4920\" data-end=\"4923\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4925\" data-end=\"4955\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"4957\" data-end=\"5203\"\u003e\n\u003cli data-section-id=\"8e7fsu\" data-start=\"4957\" data-end=\"4996\"\u003eInspect regularly for leaks and wear.\u003c\/li\u003e\n\u003cli data-section-id=\"1nnyne9\" data-start=\"4997\" data-end=\"5047\"\u003eVerify pressure settings during routine service.\u003c\/li\u003e\n\u003cli data-section-id=\"rst94\" data-start=\"5048\" data-end=\"5083\"\u003eMaintain proper water filtration.\u003c\/li\u003e\n\u003cli data-section-id=\"178nkfp\" data-start=\"5084\" data-end=\"5111\"\u003eMonitor bypass operation.\u003c\/li\u003e\n\u003cli data-section-id=\"16ap0lr\" data-start=\"5112\" data-end=\"5167\"\u003eReplace worn seals and internal components as needed.\u003c\/li\u003e\n\u003cli data-section-id=\"hoeat8\" data-start=\"5168\" data-end=\"5203\"\u003eFollow PA maintenance guidelines.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PA","offers":[{"title":"Default Title","offer_id":53429581054315,"sku":null,"price":68.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/PAVB3KAUNLOADER.webp?v=1782523635","url":"https:\/\/generalsprayers.com\/products\/pa-vb3ka-pressure-washer-unloader-valve-6-5-gpm-adjustable-323-psi-to-3650-psi-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}