{"product_id":"stenner85m538singleheadfeederstennerpump85gpd25psiadj120v38whitetubing85mjl5a3staastn85mjl5a3staa","title":"Stenner 85M5 3\/8\" Single Head Feeder Pump 120V 3\/8\" White Tubing  | 85MJL5A3STAA","description":"\u003cdiv\u003e\n  \u003ch2\u003eStenner 85MJL5A3STAA Classic Series Single Head Adjustable Peristaltic Metering Pump – 85 GPD, 25 PSI, 120V (3\/8\" Tube)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Stenner 85MJL5A3STAA is a Classic Series \u003cstrong\u003esingle head adjustable-output\u003c\/strong\u003e peristaltic metering pump designed for dependable chemical feed in commercial pools, water treatment, and industrial applications.\n    Output is adjusted with an external dial to fine-tune dosing, while the peristaltic design stays self-priming and handles many off-gassing solutions without losing prime.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeries\/Type:\u003c\/strong\u003e Classic Series 85MJ, single head adjustable-output peristaltic pump\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAdjustable feed control:\u003c\/strong\u003e External dial provides an adjustable range from approximately \u003cstrong\u003e5% to 100%\u003c\/strong\u003e output in \u003cstrong\u003e2.5% increments\u003c\/strong\u003e (20:1 turndown)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuickPro® pump head:\u003c\/strong\u003e Tool-free access and fast pump tube replacement\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePeristaltic dosing:\u003c\/strong\u003e Self-priming, consistent metering, and tolerant of many off-gassing chemical solutions\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService-friendly design:\u003c\/strong\u003e Motor, feed rate control, and pump head separate without tools for easier maintenance\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePerformance \u0026amp; Specifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax output (at 25 PSI):\u003c\/strong\u003e Up to \u003cstrong\u003e85 gallons per day\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApprox. adjustable range (at 25 PSI):\u003c\/strong\u003e \u003cstrong\u003e4.3 to 85 GPD\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax working pressure:\u003c\/strong\u003e \u003cstrong\u003e25 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax suction lift:\u003c\/strong\u003e \u003cstrong\u003e25 ft\u003c\/strong\u003e vertical lift (water)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoltage\/Frequency:\u003c\/strong\u003e \u003cstrong\u003e120V, 60 Hz, single phase\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e \u003cstrong\u003e125°F\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax viscosity:\u003c\/strong\u003e Up to \u003cstrong\u003e1500 cP\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePump tube (this model):\u003c\/strong\u003e \u003cstrong\u003eTube #5\u003c\/strong\u003e (3\/8\" OD white) with \u003cstrong\u003eSantoprene®\u003c\/strong\u003e tube material\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e \u003cstrong\u003e1\/30 HP\u003c\/strong\u003e, continuous duty\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePower cord:\u003c\/strong\u003e \u003cstrong\u003e6 ft\u003c\/strong\u003e cord with standard 120V plug\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShipping weight (approx.):\u003c\/strong\u003e \u003cstrong\u003e9 lbs\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePool and spa chemical feed (sanitizer, pH control)\u003c\/li\u003e\n    \u003cli\u003eWater conditioning (oxidation, disinfection, scale\/corrosion control)\u003c\/li\u003e\n    \u003cli\u003eIndustrial process dosing and cooling tower treatment\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=stenner%2085MJL5A3STAA\"\u003eSearch: Stenner 85MJL5A3STAA\u003c\/a\u003e\n      \u003cspan\u003e (check if this exact pump is listed in our catalog)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=stenner%20tube%205%203%2F8%20santoprene\"\u003eSearch: Stenner Pump Tube #5 (3\/8\" Santoprene)\u003c\/a\u003e\n      \u003cspan\u003e (primary wear item that controls output on this model)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=stenner%20quickpro%20pump%20head%20service%20kit\"\u003eSearch: Stenner QuickPro Pump Head Service Kit\u003c\/a\u003e\n      \u003cspan\u003e (roller\/parts kits for QuickPro heads, depending on inventory)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=stenner%20injection%20check%20valve\"\u003eSearch: Stenner Injection Check Valve\u003c\/a\u003e\n      \u003cspan\u003e (a restricted injection point can stop flow even if the pump runs)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=stenner%20suction%20strainer%20foot%20valve\"\u003eSearch: Stenner Suction Strainer \/ Foot Valve\u003c\/a\u003e\n      \u003cspan\u003e (helps prevent debris from entering the suction line and pump head)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=MP90000%20stenner%20rain%20roof\"\u003eSearch: Stenner Rain Roof (MP90000)\u003c\/a\u003e\n      \u003cspan\u003e (recommended for outdoor installations)\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003ca href=\"https:\/\/aquapoolsupply.com\/collections\/vendors?q=stenner\"\u003eShop: Stenner\u003c\/a\u003e\n      \u003cspan\u003e (browse more Stenner pumps, parts, and accessories)\u003c\/span\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCalibrate output in the field after installation—actual feed can vary based on chemical properties, suction lift, and system pressure.\u003c\/li\u003e\n    \u003cli\u003eReplace the pump tube on a regular schedule; a worn tube is the most common cause of low output, loss of prime, and inconsistent dosing.\u003c\/li\u003e\n    \u003cli\u003eIf the pump runs but flow is low, inspect the injection check valve and the injection point for scale or blockage.\u003c\/li\u003e\n    \u003cli\u003eKeep suction connections airtight—small air leaks on the suction side can cause intermittent output and priming issues.\u003c\/li\u003e\n    \u003cli\u003eFor outdoor installs, protect the unit from direct weather exposure (use a compatible rain roof\/cover where applicable).\u003c\/li\u003e\n    \u003cli\u003eAfter servicing, run the pump and visually confirm steady discharge flow, then re-check for drips or air intrusion at fittings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Stenner","offers":[{"title":"Default Title","offer_id":52589959971132,"sku":"85MJL5A3STAA","price":499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/stenner-85m5-38-single-head-feeder-pump-120v-38-white-tubing-85mjl5a3staa-miscellaneous-4596713.jpg?v=1770672377","url":"https:\/\/aquapoolsupply.com\/products\/stenner85m538singleheadfeederstennerpump85gpd25psiadj120v38whitetubing85mjl5a3staastn85mjl5a3staa","provider":"Aqua Pool Supply","version":"1.0","type":"link"}