{"product_id":"ar21040-mini-matic-unloader-valve-with-injector-oem-replacement-part","title":"AR21040 Mini-Matic Unloader Valve with Injector – OEM Replacement Part","description":"\u003cp data-start=\"0\" data-end=\"182\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 6091\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 \u0026amp; Compact Unloader Valves\u003cbr data-start=\"113\" data-end=\"116\"\u003e\u003cstrong data-start=\"116\" data-end=\"125\"\u003eType:\u003c\/strong\u003e AR Pumps AR21040 Mini-Matic Unloader Valve with Injector\u003c\/p\u003e\n\u003chr data-start=\"184\" data-end=\"187\"\u003e\n\u003cp data-start=\"269\" data-end=\"709\"\u003eThe \u003cstrong data-start=\"273\" data-end=\"346\"\u003eAR Pumps AR21040 Mini-Matic Unloader Valve with Injector (Part #6091)\u003c\/strong\u003e is a compact OEM replacement unloader designed to provide reliable pressure regulation, pump protection, and downstream chemical injection capabilities for pressure washer systems. Manufactured by \u003cstrong data-start=\"544\" data-end=\"575\"\u003eAR Pumps (Annovi Reverberi)\u003c\/strong\u003e, this Mini-Matic unloader is rated for \u003cstrong data-start=\"615\" data-end=\"633\"\u003e3.0 to 4.0 GPM\u003c\/strong\u003e, pressures up to \u003cstrong data-start=\"651\" data-end=\"664\"\u003e2,600 PSI\u003c\/strong\u003e, and operating temperatures up to \u003cstrong data-start=\"699\" data-end=\"708\"\u003e160°F\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1518\" data-end=\"1521\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1523\" data-end=\"1549\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1551\" data-end=\"2004\"\u003e\n\u003cli data-section-id=\"178z840\" data-start=\"1551\" data-end=\"1600\"\u003eGenuine AR Pumps OEM replacement unloader valve\u003c\/li\u003e\n\u003cli data-section-id=\"c7h1uf\" data-start=\"1601\" data-end=\"1642\"\u003eIntegrated downstream chemical injector\u003c\/li\u003e\n\u003cli data-section-id=\"1fwnplt\" data-start=\"1643\" data-end=\"1670\"\u003eCompact Mini-Matic design\u003c\/li\u003e\n\u003cli data-section-id=\"1tjl1cr\" data-start=\"1671\" data-end=\"1696\"\u003eRated for 3.0 – 4.0 GPM\u003c\/li\u003e\n\u003cli data-section-id=\"14zfp9l\" data-start=\"1697\" data-end=\"1735\"\u003eMaximum pressure rating of 2,600 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"1e2zjai\" data-start=\"1736\" data-end=\"1764\"\u003eAutomatic bypass operation\u003c\/li\u003e\n\u003cli data-section-id=\"1fw8lyz\" data-start=\"1765\" data-end=\"1810\"\u003eHelps protect pumps and plumbing components\u003c\/li\u003e\n\u003cli data-section-id=\"l9cv3h\" data-start=\"1811\" data-end=\"1854\"\u003eAllows detergent and chemical application\u003c\/li\u003e\n\u003cli data-section-id=\"1ab82zw\" data-start=\"1855\" data-end=\"1887\"\u003eReduces system pressure spikes\u003c\/li\u003e\n\u003cli data-section-id=\"ng1lq0\" data-start=\"1888\" data-end=\"1931\"\u003eIdeal for compact pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"7dzq54\" data-start=\"1932\" data-end=\"1971\"\u003eDurable commercial-grade construction\u003c\/li\u003e\n\u003cli data-section-id=\"pn4kg1\" data-start=\"1972\" data-end=\"2004\"\u003eReliable long-term performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2006\" data-end=\"2009\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"2011\" data-end=\"2038\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2040\" data-end=\"2061\"\u003e\u003cstrong data-start=\"2040\" data-end=\"2056\"\u003ePart Number:\u003c\/strong\u003e 6091\u003c\/p\u003e\n\u003cp data-start=\"2063\" data-end=\"2108\"\u003e\u003cstrong data-start=\"2063\" data-end=\"2080\"\u003eManufacturer:\u003c\/strong\u003e AR Pumps (Annovi Reverberi)\u003c\/p\u003e\n\u003cp data-start=\"2110\" data-end=\"2147\"\u003e\u003cstrong data-start=\"2110\" data-end=\"2139\"\u003eManufacturer Part Number:\u003c\/strong\u003e AR21040\u003c\/p\u003e\n\u003cp data-start=\"2149\" data-end=\"2184\"\u003e\u003cstrong data-start=\"2149\" data-end=\"2159\"\u003eModel:\u003c\/strong\u003e Mini-Matic with Injector\u003c\/p\u003e\n\u003cp data-start=\"2186\" data-end=\"2234\"\u003e\u003cstrong data-start=\"2186\" data-end=\"2203\"\u003eProduct Type:\u003c\/strong\u003e Pressure Washer Unloader Valve\u003c\/p\u003e\n\u003cp data-start=\"2236\" data-end=\"2267\"\u003e\u003cstrong data-start=\"2236\" data-end=\"2257\"\u003eMaximum Pressure:\u003c\/strong\u003e 2,600 PSI\u003c\/p\u003e\n\u003cp data-start=\"2269\" data-end=\"2298\"\u003e\u003cstrong data-start=\"2269\" data-end=\"2284\"\u003eFlow Range:\u003c\/strong\u003e 3.0 – 4.0 GPM\u003c\/p\u003e\n\u003cp data-start=\"2300\" data-end=\"2330\"\u003e\u003cstrong data-start=\"2300\" data-end=\"2324\"\u003eMaximum Temperature:\u003c\/strong\u003e 160°F\u003c\/p\u003e\n\u003cp data-start=\"2332\" data-end=\"2362\"\u003e\u003cstrong data-start=\"2332\" data-end=\"2353\"\u003eInlet Connection:\u003c\/strong\u003e 1\/2\" FPT\u003c\/p\u003e\n\u003cp data-start=\"2364\" data-end=\"2395\"\u003e\u003cstrong data-start=\"2364\" data-end=\"2386\"\u003eOutlet Connection:\u003c\/strong\u003e 3\/8\" MPT\u003c\/p\u003e\n\u003cp data-start=\"2397\" data-end=\"2430\"\u003e\u003cstrong data-start=\"2397\" data-end=\"2419\"\u003eChemical Injector:\u003c\/strong\u003e Integrated\u003c\/p\u003e\n\u003cp data-start=\"2432\" data-end=\"2479\"\u003e\u003cstrong data-start=\"2432\" data-end=\"2450\"\u003eUnloader Type:\u003c\/strong\u003e Mini-Matic Pressure Actuated\u003c\/p\u003e\n\u003cp data-start=\"2481\" data-end=\"2505\"\u003e\u003cstrong data-start=\"2481\" data-end=\"2501\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2507\" data-end=\"2510\"\u003e\n\u003ch2 data-section-id=\"1c6avxs\" data-start=\"2512\" data-end=\"2552\"\u003eIntegrated Chemical Injector Benefits\u003c\/h2\u003e\n\u003cp data-start=\"2554\" data-end=\"2583\"\u003eThe built-in injector allows:\u003c\/p\u003e\n\u003cul data-start=\"2585\" data-end=\"2773\"\u003e\n\u003cli data-section-id=\"16zky9y\" data-start=\"2585\" data-end=\"2619\"\u003eDownstream detergent application\u003c\/li\u003e\n\u003cli data-section-id=\"9lqy9a\" data-start=\"2620\" data-end=\"2649\"\u003eReduced plumbing complexity\u003c\/li\u003e\n\u003cli data-section-id=\"bfi9q8\" data-start=\"2650\" data-end=\"2681\"\u003eFewer fittings and components\u003c\/li\u003e\n\u003cli data-section-id=\"hfvgbc\" data-start=\"2682\" data-end=\"2707\"\u003eSimplified installation\u003c\/li\u003e\n\u003cli data-section-id=\"178kqz2\" data-start=\"2708\" data-end=\"2734\"\u003eEasy detergent switching\u003c\/li\u003e\n\u003cli data-section-id=\"6miqlo\" data-start=\"2735\" data-end=\"2773\"\u003eEfficient cleaning chemical delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2775\" data-end=\"2871\"\u003eThis design eliminates the need for a separate injector assembly in many pressure washer setups.\u003c\/p\u003e\n\u003chr data-start=\"2873\" data-end=\"2876\"\u003e\n\u003ch2 data-section-id=\"77w02t\" data-start=\"2878\" data-end=\"2912\"\u003eWhat a Mini-Matic Unloader Does\u003c\/h2\u003e\n\u003cp data-start=\"2914\" data-end=\"2941\"\u003eThe AR21040 is designed to:\u003c\/p\u003e\n\u003cul data-start=\"2943\" data-end=\"3180\"\u003e\n\u003cli data-section-id=\"1guzp1l\" data-start=\"2943\" data-end=\"2972\"\u003eRegulate operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1gzaa3t\" data-start=\"2973\" data-end=\"3025\"\u003eDivert water flow when the trigger gun is released\u003c\/li\u003e\n\u003cli data-section-id=\"syvdyp\" data-start=\"3026\" data-end=\"3062\"\u003ePrevent excessive pressure buildup\u003c\/li\u003e\n\u003cli data-section-id=\"zv23ry\" data-start=\"3063\" data-end=\"3105\"\u003eProtect pumps, hoses, guns, and fittings\u003c\/li\u003e\n\u003cli data-section-id=\"fhdcyw\" data-start=\"3106\" data-end=\"3142\"\u003eImprove overall system reliability\u003c\/li\u003e\n\u003cli data-section-id=\"1v5u496\" data-start=\"3143\" data-end=\"3180\"\u003eExtend pressure washer service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3182\" data-end=\"3281\"\u003eWhen the trigger gun closes, water is redirected through the bypass circuit until cleaning resumes.\u003c\/p\u003e\n\u003chr data-start=\"3283\" data-end=\"3286\"\u003e\n\u003ch2 data-section-id=\"vx2wyp\" data-start=\"3288\" data-end=\"3310\"\u003eCommon Applications\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1m4yfbj\" data-start=\"3312\" data-end=\"3339\"\u003ePressure Washer Systems\u003c\/h3\u003e\n\u003cp data-start=\"3341\" data-end=\"3351\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-start=\"3353\" data-end=\"3505\"\u003e\n\u003cli data-section-id=\"xvja5y\" data-start=\"3353\" data-end=\"3383\"\u003eResidential pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"n48o3f\" data-start=\"3384\" data-end=\"3415\"\u003eCommercial cleaning equipment\u003c\/li\u003e\n\u003cli data-section-id=\"1d973ig\" data-start=\"3416\" data-end=\"3447\"\u003eDirect-drive pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"6io7s6\" data-start=\"3448\" data-end=\"3481\"\u003eCompact pressure washer systems\u003c\/li\u003e\n\u003cli data-section-id=\"5z2q8o\" data-start=\"3482\" data-end=\"3505\"\u003eMobile cleaning units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"pnm616\" data-start=\"3507\" data-end=\"3532\"\u003eCleaning Applications\u003c\/h3\u003e\n\u003cp data-start=\"3534\" data-end=\"3547\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul data-start=\"3549\" data-end=\"3673\"\u003e\n\u003cli data-section-id=\"d4mmu5\" data-start=\"3549\" data-end=\"3566\"\u003eVehicle washing\u003c\/li\u003e\n\u003cli data-section-id=\"zo3ggr\" data-start=\"3567\" data-end=\"3586\"\u003eBuilding cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"1snc8yn\" data-start=\"3587\" data-end=\"3610\"\u003eEquipment maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"64g5as\" data-start=\"3611\" data-end=\"3634\"\u003eAgricultural cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"xkh8e3\" data-start=\"3635\" data-end=\"3650\"\u003eFleet washing\u003c\/li\u003e\n\u003cli data-section-id=\"1hcbv4i\" data-start=\"3651\" data-end=\"3673\"\u003eProperty maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wjr1co\" data-start=\"3675\" data-end=\"3699\"\u003eChemical Application\u003c\/h3\u003e\n\u003cp data-start=\"3701\" data-end=\"3720\"\u003eCommonly used with:\u003c\/p\u003e\n\u003cul data-start=\"3722\" data-end=\"3826\"\u003e\n\u003cli data-section-id=\"1q0qfdt\" data-start=\"3722\" data-end=\"3734\"\u003eDetergents\u003c\/li\u003e\n\u003cli data-section-id=\"1mp2pwv\" data-start=\"3735\" data-end=\"3747\"\u003eDegreasers\u003c\/li\u003e\n\u003cli data-section-id=\"1eqf5k3\" data-start=\"3748\" data-end=\"3768\"\u003eVehicle wash soaps\u003c\/li\u003e\n\u003cli data-section-id=\"1337idt\" data-start=\"3769\" data-end=\"3797\"\u003eGeneral cleaning solutions\u003c\/li\u003e\n\u003cli data-section-id=\"2aua5z\" data-start=\"3798\" data-end=\"3826\"\u003ePressure washing chemicals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3828\" data-end=\"3831\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"3833\" data-end=\"3856\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"3858\" data-end=\"4091\"\u003e\n\u003cli data-section-id=\"1bl7wox\" data-start=\"3858\" data-end=\"3888\"\u003eReliable pressure regulation\u003c\/li\u003e\n\u003cli data-section-id=\"17s1qjt\" data-start=\"3889\" data-end=\"3919\"\u003eBuilt-in detergent injection\u003c\/li\u003e\n\u003cli data-section-id=\"1rfyis4\" data-start=\"3920\" data-end=\"3953\"\u003eReduced installation complexity\u003c\/li\u003e\n\u003cli data-section-id=\"1bb2u3x\" data-start=\"3954\" data-end=\"3980\"\u003eImproved pump protection\u003c\/li\u003e\n\u003cli data-section-id=\"1n9g3io\" data-start=\"3981\" data-end=\"4012\"\u003eConsistent operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1wriplc\" data-start=\"4013\" data-end=\"4045\"\u003eCompact installation footprint\u003c\/li\u003e\n\u003cli data-section-id=\"bugqtc\" data-start=\"4046\" data-end=\"4071\"\u003eReduced component count\u003c\/li\u003e\n\u003cli data-section-id=\"1wdzf4p\" data-start=\"4072\" data-end=\"4091\"\u003eLong service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4093\" data-end=\"4096\"\u003e\n\u003ch2 data-section-id=\"x2tt67\" data-start=\"4098\" data-end=\"4142\"\u003eSigns an Unloader Valve Needs Replacement\u003c\/h2\u003e\n\u003cp data-start=\"4144\" data-end=\"4176\"\u003eReplace the valve if you notice:\u003c\/p\u003e\n\u003cul data-start=\"4178\" data-end=\"4394\"\u003e\n\u003cli data-section-id=\"zta6im\" data-start=\"4178\" data-end=\"4201\"\u003ePressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"1me4qo6\" data-start=\"4202\" data-end=\"4224\"\u003eChemical draw issues\u003c\/li\u003e\n\u003cli data-section-id=\"1g7kb8v\" data-start=\"4225\" data-end=\"4257\"\u003eWater leakage around the valve\u003c\/li\u003e\n\u003cli data-section-id=\"irubn0\" data-start=\"4258\" data-end=\"4285\"\u003eReduced cleaning pressure\u003c\/li\u003e\n\u003cli data-section-id=\"op63ib\" data-start=\"4286\" data-end=\"4317\"\u003eDifficulty adjusting pressure\u003c\/li\u003e\n\u003cli data-section-id=\"d4j17h\" data-start=\"4318\" data-end=\"4341\"\u003ePump cycling problems\u003c\/li\u003e\n\u003cli data-section-id=\"uz2anl\" data-start=\"4342\" data-end=\"4365\"\u003eExcessive bypass flow\u003c\/li\u003e\n\u003cli data-section-id=\"wk4w4r\" data-start=\"4366\" data-end=\"4394\"\u003eInternal wear or corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4396\" data-end=\"4399\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"4401\" data-end=\"4422\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"4424\" data-end=\"4862\"\u003e\n\u003cli data-section-id=\"v1qt1w\" data-start=\"4424\" data-end=\"4489\"\u003eShut down the pressure washer and relieve all system pressure.\u003c\/li\u003e\n\u003cli data-section-id=\"14l3q9l\" data-start=\"4490\" data-end=\"4557\"\u003eVerify compatibility with system pressure and flow requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"1vgduw5\" data-start=\"4558\" data-end=\"4612\"\u003eInstall using the appropriate threaded connections.\u003c\/li\u003e\n\u003cli data-section-id=\"158jhau\" data-start=\"4613\" data-end=\"4674\"\u003eConnect the chemical pickup line to the injector assembly.\u003c\/li\u003e\n\u003cli data-section-id=\"1d3s9im\" data-start=\"4675\" data-end=\"4714\"\u003eApply thread sealant where required.\u003c\/li\u003e\n\u003cli data-section-id=\"kdig35\" data-start=\"4715\" data-end=\"4775\"\u003eAdjust pressure according to manufacturer specifications.\u003c\/li\u003e\n\u003cli data-section-id=\"efj2sf\" data-start=\"4776\" data-end=\"4862\"\u003eTest pressure and chemical draw performance before returning the system to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4864\" data-end=\"4976\"\u003e\u003cstrong data-start=\"4864\" data-end=\"4878\"\u003eImportant:\u003c\/strong\u003e Always verify compatibility between cleaning chemicals and pressure washer components before use.\u003c\/p\u003e\n\u003chr data-start=\"4978\" data-end=\"4981\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4983\" data-end=\"5013\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"5015\" data-end=\"5299\"\u003e\n\u003cli data-section-id=\"8e7fsu\" data-start=\"5015\" data-end=\"5054\"\u003eInspect regularly for leaks and wear.\u003c\/li\u003e\n\u003cli data-section-id=\"11im2af\" data-start=\"5055\" data-end=\"5094\"\u003eClean injector passages periodically.\u003c\/li\u003e\n\u003cli data-section-id=\"ybsf6o\" data-start=\"5095\" data-end=\"5155\"\u003eVerify chemical draw operation during routine maintenance.\u003c\/li\u003e\n\u003cli data-section-id=\"jd9knh\" data-start=\"5156\" data-end=\"5196\"\u003eMaintain clean inlet water filtration.\u003c\/li\u003e\n\u003cli data-section-id=\"16ap0lr\" data-start=\"5197\" data-end=\"5252\"\u003eReplace worn seals and internal components as needed.\u003c\/li\u003e\n\u003cli data-section-id=\"1skoia0\" data-start=\"5253\" data-end=\"5299\"\u003eFollow AR Pumps maintenance recommendations.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Annovi Reverberi","offers":[{"title":"Default Title","offer_id":53429568962923,"sku":null,"price":130.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/AR21040MINI-MATIC.webp?v=1782520479","url":"https:\/\/generalsprayers.com\/products\/ar21040-mini-matic-unloader-valve-with-injector-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}