{"product_id":"ar21039-mini-matic-unloader-valve-with-injector-oem-replacement-part","title":"AR21039 Mini-Matic Unloader Valve with Injector – OEM Replacement Part","description":"\u003cp data-start=\"0\" data-end=\"172\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 6090\u003cbr data-start=\"21\" data-end=\"24\"\u003e\u003cstrong data-start=\"24\" data-end=\"37\"\u003eCategory:\u003c\/strong\u003e Pressure Washer Parts → Unloader Valves → Bolt-On Unloader Valves\u003cbr data-start=\"103\" data-end=\"106\"\u003e\u003cstrong data-start=\"106\" data-end=\"115\"\u003eType:\u003c\/strong\u003e AR Pumps AR21039 Mini-Matic Unloader Valve with Injector\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"174\" data-end=\"177\"\u003e\n\u003cp data-start=\"259\" data-end=\"789\"\u003eThe \u003cstrong data-start=\"263\" data-end=\"336\"\u003eAR Pumps AR21039 Mini-Matic Unloader Valve with Injector (Part #6090)\u003c\/strong\u003e is a genuine OEM replacement pressure-actuated bolt-on unloader designed for compact pressure washer systems operating between \u003cstrong data-start=\"464\" data-end=\"483\"\u003e2.0 and 3.0 GPM\u003c\/strong\u003e and pressures up to \u003cstrong data-start=\"504\" data-end=\"517\"\u003e2,600 PSI\u003c\/strong\u003e. Manufactured by \u003cstrong data-start=\"535\" data-end=\"566\"\u003eAR Pumps (Annovi Reverberi)\u003c\/strong\u003e, this Mini-Matic unloader combines reliable pressure regulation with an \u003cstrong data-start=\"639\" data-end=\"682\"\u003eintegrated downstream chemical injector\u003c\/strong\u003e, making it an ideal solution for residential, light commercial, and portable pressure washer applications.\u003c\/p\u003e\n\u003chr data-start=\"1372\" data-end=\"1375\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1377\" data-end=\"1403\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1405\" data-end=\"1911\"\u003e\n\u003cli data-section-id=\"178z840\" data-start=\"1405\" data-end=\"1454\"\u003eGenuine AR Pumps OEM replacement unloader valve\u003c\/li\u003e\n\u003cli data-section-id=\"o2vo1r\" data-start=\"1455\" data-end=\"1482\"\u003eMini-Matic bolt-on design\u003c\/li\u003e\n\u003cli data-section-id=\"c7h1uf\" data-start=\"1483\" data-end=\"1524\"\u003eIntegrated downstream chemical injector\u003c\/li\u003e\n\u003cli data-section-id=\"alnu3l\" data-start=\"1525\" data-end=\"1575\"\u003eDesigned for 2.0–3.0 GPM pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"15jbg0j\" data-start=\"1576\" data-end=\"1617\"\u003eMaximum operating pressure of 2,600 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"7b3l7s\" data-start=\"1618\" data-end=\"1654\"\u003ePressure-actuated bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1fig5wy\" data-start=\"1655\" data-end=\"1691\"\u003eCompact, direct-mount installation\u003c\/li\u003e\n\u003cli data-section-id=\"26wjm6\" data-start=\"1692\" data-end=\"1734\"\u003eHelps protect pumps from pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"vg01y0\" data-start=\"1735\" data-end=\"1776\"\u003eSimplifies detergent injection plumbing\u003c\/li\u003e\n\u003cli data-section-id=\"7dzq54\" data-start=\"1777\" data-end=\"1816\"\u003eDurable commercial-grade construction\u003c\/li\u003e\n\u003cli data-section-id=\"pn4kg1\" data-start=\"1817\" data-end=\"1849\"\u003eReliable long-term performance\u003c\/li\u003e\n\u003cli data-section-id=\"zqdb29\" data-start=\"1850\" data-end=\"1911\"\u003eIdeal for residential and light commercial pressure washers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1913\" data-end=\"1916\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1918\" data-end=\"1945\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1947\" data-end=\"1968\"\u003e\u003cstrong data-start=\"1947\" data-end=\"1963\"\u003ePart Number:\u003c\/strong\u003e 6090\u003c\/p\u003e\n\u003cp data-start=\"1970\" data-end=\"2015\"\u003e\u003cstrong data-start=\"1970\" data-end=\"1987\"\u003eManufacturer:\u003c\/strong\u003e AR Pumps (Annovi Reverberi)\u003c\/p\u003e\n\u003cp data-start=\"2017\" data-end=\"2046\"\u003e\u003cstrong data-start=\"2017\" data-end=\"2027\"\u003eModel:\u003c\/strong\u003e AR21039 Mini-Matic\u003c\/p\u003e\n\u003cp data-start=\"2048\" data-end=\"2096\"\u003e\u003cstrong data-start=\"2048\" data-end=\"2065\"\u003eProduct Type:\u003c\/strong\u003e Pressure Washer Unloader Valve\u003c\/p\u003e\n\u003cp data-start=\"2098\" data-end=\"2132\"\u003e\u003cstrong data-start=\"2098\" data-end=\"2120\"\u003eMaximum Flow Rate:\u003c\/strong\u003e 2.0–3.0 GPM\u003c\/p\u003e\n\u003cp data-start=\"2134\" data-end=\"2165\"\u003e\u003cstrong data-start=\"2134\" data-end=\"2155\"\u003eMaximum Pressure:\u003c\/strong\u003e 2,600 PSI\u003c\/p\u003e\n\u003cp data-start=\"2167\" data-end=\"2197\"\u003e\u003cstrong data-start=\"2167\" data-end=\"2191\"\u003eMaximum Temperature:\u003c\/strong\u003e 160°F\u003c\/p\u003e\n\u003cp data-start=\"2199\" data-end=\"2229\"\u003e\u003cstrong data-start=\"2199\" data-end=\"2220\"\u003eInlet Connection:\u003c\/strong\u003e 1\/2\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2231\" data-end=\"2262\"\u003e\u003cstrong data-start=\"2231\" data-end=\"2253\"\u003eOutlet Connection:\u003c\/strong\u003e 3\/8\" MPT\u003c\/p\u003e\n\u003cp data-start=\"2264\" data-end=\"2317\"\u003e\u003cstrong data-start=\"2264\" data-end=\"2286\"\u003eChemical Injector:\u003c\/strong\u003e Integrated Downstream Injector\u003c\/p\u003e\n\u003cp data-start=\"2319\" data-end=\"2356\"\u003e\u003cstrong data-start=\"2319\" data-end=\"2338\"\u003eOperation Type:\u003c\/strong\u003e Pressure Actuated\u003c\/p\u003e\n\u003cp data-start=\"2358\" data-end=\"2385\"\u003e\u003cstrong data-start=\"2358\" data-end=\"2377\"\u003eMounting Style:\u003c\/strong\u003e Bolt-On\u003c\/p\u003e\n\u003cp data-start=\"2387\" data-end=\"2411\"\u003e\u003cstrong data-start=\"2387\" data-end=\"2407\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2413\" data-end=\"2416\"\u003e\n\u003ch2 data-section-id=\"z71wms\" data-start=\"2418\" data-end=\"2449\"\u003eIntegrated Chemical Injector\u003c\/h2\u003e\n\u003cp data-start=\"2451\" data-end=\"2595\"\u003eThe built-in injector allows downstream application of soaps, detergents, and cleaning solutions without requiring a separate injector assembly.\u003c\/p\u003e\n\u003ch3 data-section-id=\"n2y7d0\" data-start=\"2597\" data-end=\"2618\"\u003eBenefits include:\u003c\/h3\u003e\n\u003cul data-start=\"2620\" data-end=\"2806\"\u003e\n\u003cli data-section-id=\"hfvgbc\" data-start=\"2620\" data-end=\"2645\"\u003eSimplified installation\u003c\/li\u003e\n\u003cli data-section-id=\"6nzhkm\" data-start=\"2646\" data-end=\"2675\"\u003eReduced plumbing components\u003c\/li\u003e\n\u003cli data-section-id=\"ekm0p6\" data-start=\"2676\" data-end=\"2701\"\u003eReliable detergent draw\u003c\/li\u003e\n\u003cli data-section-id=\"r5qute\" data-start=\"2702\" data-end=\"2749\"\u003eProtection of the pump from chemical exposure\u003c\/li\u003e\n\u003cli data-section-id=\"1yedagu\" data-start=\"2750\" data-end=\"2806\"\u003eEasy integration into existing pressure washer systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2808\" data-end=\"2879\"\u003eCompatible with many pressure washer detergents and cleaning chemicals.\u003c\/p\u003e\n\u003chr data-start=\"2881\" data-end=\"2884\"\u003e\n\u003ch2 data-section-id=\"12kdpxk\" data-start=\"2886\" data-end=\"2922\"\u003eHow the Mini-Matic Unloader Works\u003c\/h2\u003e\n\u003cp data-start=\"2924\" data-end=\"2955\"\u003eWhen the spray gun is released:\u003c\/p\u003e\n\u003cul data-start=\"2957\" data-end=\"3171\"\u003e\n\u003cli data-section-id=\"1o72rcr\" data-start=\"2957\" data-end=\"2989\"\u003eWater flow stops at the outlet\u003c\/li\u003e\n\u003cli data-section-id=\"dwszg6\" data-start=\"2990\" data-end=\"3013\"\u003eSystem pressure rises\u003c\/li\u003e\n\u003cli data-section-id=\"j99eal\" data-start=\"3014\" data-end=\"3052\"\u003eThe unloader shifts into bypass mode\u003c\/li\u003e\n\u003cli data-section-id=\"11juf3r\" data-start=\"3053\" data-end=\"3103\"\u003eWater is redirected away from the discharge line\u003c\/li\u003e\n\u003cli data-section-id=\"www87g\" data-start=\"3104\" data-end=\"3133\"\u003eExcess pressure is relieved\u003c\/li\u003e\n\u003cli data-section-id=\"1enbxd3\" data-start=\"3134\" data-end=\"3171\"\u003eThe pump is protected from overload\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3173\" data-end=\"3206\"\u003eWhen the trigger gun is reopened:\u003c\/p\u003e\n\u003cul data-start=\"3208\" data-end=\"3353\"\u003e\n\u003cli data-section-id=\"1ech883\" data-start=\"3208\" data-end=\"3254\"\u003eWater flow immediately returns to the outlet\u003c\/li\u003e\n\u003cli data-section-id=\"vaikfp\" data-start=\"3255\" data-end=\"3292\"\u003eFull operating pressure is restored\u003c\/li\u003e\n\u003cli data-section-id=\"mvr5k7\" data-start=\"3293\" data-end=\"3353\"\u003eChemical injection resumes when detergent is being applied\u003c\/li\u003e\n\u003c\/ul\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=\"1m4yfbj\" data-start=\"3384\" data-end=\"3411\"\u003ePressure Washer Systems\u003c\/h3\u003e\n\u003cp data-start=\"3413\" data-end=\"3423\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-start=\"3425\" data-end=\"3583\"\u003e\n\u003cli data-section-id=\"xvja5y\" data-start=\"3425\" data-end=\"3455\"\u003eResidential pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"8zwadi\" data-start=\"3456\" data-end=\"3491\"\u003eLight commercial pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"15bo0tt\" data-start=\"3492\" data-end=\"3524\"\u003ePortable pressure washer units\u003c\/li\u003e\n\u003cli data-section-id=\"1xt4d8c\" data-start=\"3525\" data-end=\"3551\"\u003eCompact cleaning systems\u003c\/li\u003e\n\u003cli data-section-id=\"1d973ig\" data-start=\"3552\" data-end=\"3583\"\u003eDirect-drive pressure washers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"pnm616\" data-start=\"3585\" data-end=\"3610\"\u003eCleaning Applications\u003c\/h3\u003e\n\u003cp data-start=\"3612\" data-end=\"3625\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul data-start=\"3627\" data-end=\"3779\"\u003e\n\u003cli data-section-id=\"d4mmu5\" data-start=\"3627\" data-end=\"3644\"\u003eVehicle washing\u003c\/li\u003e\n\u003cli data-section-id=\"1wzcl2e\" data-start=\"3645\" data-end=\"3674\"\u003ePatio and driveway cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"cztt5w\" data-start=\"3675\" data-end=\"3700\"\u003eDeck and fence cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"1snc8yn\" data-start=\"3701\" data-end=\"3724\"\u003eEquipment maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"1hcbv4i\" data-start=\"3725\" data-end=\"3747\"\u003eProperty maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"gb6tbm\" data-start=\"3748\" data-end=\"3779\"\u003eGeneral cleaning applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3781\" data-end=\"3784\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"3786\" data-end=\"3809\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"3811\" data-end=\"4043\"\u003e\n\u003cli data-section-id=\"1bl7wox\" data-start=\"3811\" data-end=\"3841\"\u003eReliable pressure regulation\u003c\/li\u003e\n\u003cli data-section-id=\"1mwp3jm\" data-start=\"3842\" data-end=\"3874\"\u003eIntegrated detergent injection\u003c\/li\u003e\n\u003cli data-section-id=\"xawqy\" data-start=\"3875\" data-end=\"3905\"\u003eCompact bolt-on installation\u003c\/li\u003e\n\u003cli data-section-id=\"1bb2u3x\" data-start=\"3906\" data-end=\"3932\"\u003eImproved pump protection\u003c\/li\u003e\n\u003cli data-section-id=\"9lqy9a\" data-start=\"3933\" data-end=\"3962\"\u003eReduced plumbing complexity\u003c\/li\u003e\n\u003cli data-section-id=\"1n9g3io\" data-start=\"3963\" data-end=\"3994\"\u003eConsistent operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1kjg8fj\" data-start=\"3995\" data-end=\"4024\"\u003eExtended equipment lifespan\u003c\/li\u003e\n\u003cli data-section-id=\"7k5acb\" data-start=\"4025\" data-end=\"4043\"\u003eEasy maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4045\" data-end=\"4048\"\u003e\n\u003ch2 data-section-id=\"x2tt67\" data-start=\"4050\" data-end=\"4094\"\u003eSigns an Unloader Valve Needs Replacement\u003c\/h2\u003e\n\u003cp data-start=\"4096\" data-end=\"4131\"\u003eReplace the unloader if you notice:\u003c\/p\u003e\n\u003cul data-start=\"4133\" data-end=\"4324\"\u003e\n\u003cli data-section-id=\"zta6im\" data-start=\"4133\" data-end=\"4156\"\u003ePressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"18ke2hc\" data-start=\"4157\" data-end=\"4178\"\u003ePoor detergent draw\u003c\/li\u003e\n\u003cli data-section-id=\"ldy9cv\" data-start=\"4179\" data-end=\"4209\"\u003eWater leaks around the valve\u003c\/li\u003e\n\u003cli data-section-id=\"irubn0\" data-start=\"4210\" data-end=\"4237\"\u003eReduced cleaning pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1vz4ts\" data-start=\"4238\" data-end=\"4269\"\u003eInconsistent bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"16eqa1l\" data-start=\"4270\" data-end=\"4295\"\u003eTrigger response issues\u003c\/li\u003e\n\u003cli data-section-id=\"wk4w4r\" data-start=\"4296\" data-end=\"4324\"\u003eInternal wear or corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4326\" data-end=\"4329\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"4331\" data-end=\"4352\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"4354\" data-end=\"4719\"\u003e\n\u003cli data-section-id=\"1hh1t5l\" data-start=\"4354\" data-end=\"4409\"\u003eVerify compatibility with your pressure washer pump.\u003c\/li\u003e\n\u003cli data-section-id=\"1hhmv1s\" data-start=\"4410\" data-end=\"4459\"\u003eConfirm system flow and pressure requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"1j8b157\" data-start=\"4460\" data-end=\"4536\"\u003eInstall using the appropriate thread sealant on all threaded connections.\u003c\/li\u003e\n\u003cli data-section-id=\"1jkuouh\" data-start=\"4537\" data-end=\"4590\"\u003eConnect the detergent pickup hose to the injector.\u003c\/li\u003e\n\u003cli data-section-id=\"l20ycu\" data-start=\"4591\" data-end=\"4653\"\u003eTest bypass operation and chemical draw after installation.\u003c\/li\u003e\n\u003cli data-section-id=\"7pbb0i\" data-start=\"4654\" data-end=\"4719\"\u003eVerify proper pressure before returning the system to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4721\" data-end=\"4854\"\u003e\u003cstrong data-start=\"4721\" data-end=\"4735\"\u003eImportant:\u003c\/strong\u003e Ensure all pumps, hoses, spray guns, and fittings are rated for the intended operating pressure and flow requirements.\u003c\/p\u003e\n\u003chr data-start=\"4856\" data-end=\"4859\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4861\" data-end=\"4891\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"4893\" data-end=\"5180\"\u003e\n\u003cli data-section-id=\"8e7fsu\" data-start=\"4893\" data-end=\"4932\"\u003eInspect regularly for leaks and wear.\u003c\/li\u003e\n\u003cli data-section-id=\"kv0fhu\" data-start=\"4933\" data-end=\"4977\"\u003eFlush the injector after using detergents.\u003c\/li\u003e\n\u003cli data-section-id=\"p2ukky\" data-start=\"4978\" data-end=\"5034\"\u003eMonitor operating pressure during routine maintenance.\u003c\/li\u003e\n\u003cli data-section-id=\"jd9knh\" data-start=\"5035\" data-end=\"5075\"\u003eMaintain clean inlet water filtration.\u003c\/li\u003e\n\u003cli data-section-id=\"16ap0lr\" data-start=\"5076\" data-end=\"5131\"\u003eReplace worn seals and internal components as needed.\u003c\/li\u003e\n\u003cli data-section-id=\"1uxjrhn\" data-start=\"5132\" data-end=\"5180\"\u003eFollow AR Pumps recommended service intervals.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Annovi Reverberi","offers":[{"title":"Default Title","offer_id":53430784262507,"sku":null,"price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/AR21039MINI-MATICUNLOADER.webp?v=1782589449","url":"https:\/\/generalsprayers.com\/products\/ar21039-mini-matic-unloader-valve-with-injector-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}