{"product_id":"grundfos-92603108-pump","title":"Grundfos 92603108 Pump","description":"\u003cp\u003eThe \u003cstrong\u003eGrundfos 92603108 ALPHA 15-58 FR Circulator Pump\u003c\/strong\u003e is a \u003cstrong\u003e115V\u003c\/strong\u003e, \u003cstrong\u003e60 Hz\u003c\/strong\u003e, single-phase \u003cstrong\u003ewet-rotor circulator\u003c\/strong\u003e driven by an \u003cstrong\u003eelectronically commutated motor (ECM)\u003c\/strong\u003e and built for \u003cstrong\u003eclosed-loop hydronic heating\u003c\/strong\u003e. It moves water through \u003cstrong\u003eboilers\u003c\/strong\u003e, \u003cstrong\u003ebaseboard\u003c\/strong\u003e and \u003cstrong\u003eradiator\u003c\/strong\u003e zones and \u003cstrong\u003eradiant heating loops\u003c\/strong\u003e, and it adjusts motor speed to the load instead of running flat out the way an old fixed-speed circulator does. In the model code, \u003cstrong\u003eALPHA\u003c\/strong\u003e is the product family, \u003cstrong\u003e15\u003c\/strong\u003e is the small-circulator size, \u003cstrong\u003e58\u003c\/strong\u003e is the maximum head in decimeters (5.8 m), and \u003cstrong\u003eFR\u003c\/strong\u003e is the \u003cstrong\u003erotated flange\u003c\/strong\u003e connection. Grundfos literature lists part \u003cstrong\u003e92603108\u003c\/strong\u003e as the \u003cstrong\u003eALPHA 15-58 FRC\u003c\/strong\u003e, a \u003cstrong\u003ecast-iron rotated flange\u003c\/strong\u003e pump with an \u003cstrong\u003eintegral check valve\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe published ratings are a maximum flow of \u003cstrong\u003e13.6 GPM (3.1 m³\/h)\u003c\/strong\u003e, a maximum head of \u003cstrong\u003e19 ft\u003c\/strong\u003e, and a rated duty point of \u003cstrong\u003e8.37 GPM at 11.16 ft\u003c\/strong\u003e. Power input runs from \u003cstrong\u003e3.4 W\u003c\/strong\u003e to \u003cstrong\u003e38 W\u003c\/strong\u003e with a maximum current draw of \u003cstrong\u003e0.71 A\u003c\/strong\u003e, and the pump carries a \u003cstrong\u003eHI Energy Rating of 193\u003c\/strong\u003e and \u003cstrong\u003eTF class 110\u003c\/strong\u003e. It handles liquid from \u003cstrong\u003e36°F to 230°F\u003c\/strong\u003e at up to \u003cstrong\u003e175 psi\u003c\/strong\u003e working pressure. Construction is a \u003cstrong\u003ecast-iron pump housing\u003c\/strong\u003e with a \u003cstrong\u003ecomposite impeller\u003c\/strong\u003e, a \u003cstrong\u003eGF 15\/26\u003c\/strong\u003e flange connection and a flange-to-flange length of about \u003cstrong\u003e6-1\/2 in\u003c\/strong\u003e. Control options include \u003cstrong\u003econstant pressure\u003c\/strong\u003e, \u003cstrong\u003eproportional pressure\u003c\/strong\u003e and \u003cstrong\u003econstant curve\u003c\/strong\u003e modes, each with three fixed settings, plus an \u003cstrong\u003eAUTOADAPT\u003c\/strong\u003e setting that reads the system and removes the guesswork, and a \u003cstrong\u003econstant flow\u003c\/strong\u003e mode. The pump pairs over \u003cstrong\u003eBluetooth\u003c\/strong\u003e with the \u003cstrong\u003eGrundfos GO\u003c\/strong\u003e app for \u003cstrong\u003eguided setup\u003c\/strong\u003e, the \u003cstrong\u003eevent log\u003c\/strong\u003e, \u003cstrong\u003eair detection and venting\u003c\/strong\u003e, \u003cstrong\u003efirmware updates\u003c\/strong\u003e and trend data for \u003cstrong\u003eflow\u003c\/strong\u003e, \u003cstrong\u003ehead\u003c\/strong\u003e and \u003cstrong\u003emedia temperature\u003c\/strong\u003e. Power lands on a \u003cstrong\u003etoolless removable connector\u003c\/strong\u003e at a compact \u003cstrong\u003eterminal box with conduit connections\u003c\/strong\u003e, so the wiring can be done outside the box.\u003c\/p\u003e\n\n\u003cp\u003eFor replacement work, the Grundfos cross-reference lists the \u003cstrong\u003eALPHA 15-58\u003c\/strong\u003e against the \u003cstrong\u003eTaco 0015\/0015e3\u003c\/strong\u003e and the \u003cstrong\u003eB\u0026amp;G ecocirc 19-14\u003c\/strong\u003e, and the series succeeds the earlier \u003cstrong\u003eALPHA1 15-55\u003c\/strong\u003e. Its sibling, \u003cstrong\u003e92603115\u003c\/strong\u003e (\u003cstrong\u003eALPHA 15-58 FC\u003c\/strong\u003e), is the same pump on a standard cast-iron flange with check valve, so confirm which flange orientation your piping needs before ordering. Install the pump with the \u003cstrong\u003emotor shaft horizontal\u003c\/strong\u003e, the flow arrow on the housing pointing with the system flow, and fresh gaskets at both \u003cstrong\u003eisolation flanges\u003c\/strong\u003e. Purge the loop, then run the \u003cstrong\u003eair detection and venting\u003c\/strong\u003e routine from the GO app, because trapped air is the most common reason a new circulator sounds noisy or moves little water. If a zone runs hot or cold, check that the control mode matches the system: \u003cstrong\u003econstant pressure\u003c\/strong\u003e suits zone-valve systems, \u003cstrong\u003eproportional pressure\u003c\/strong\u003e suits systems with thermostatic radiator valves, and \u003cstrong\u003econstant curve\u003c\/strong\u003e suits zone-pump systems. Before condemning the pump, read the \u003cstrong\u003eevent log\u003c\/strong\u003e, confirm power at the \u003cstrong\u003eterminal box\u003c\/strong\u003e, and make sure the isolation valves are fully open.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLow Power Draw:\u003c\/strong\u003e the \u003cstrong\u003eECM\u003c\/strong\u003e motor holds input to \u003cstrong\u003e3.4 W–38 W\u003c\/strong\u003e and earns a \u003cstrong\u003eHI Energy Rating of 193\u003c\/strong\u003e, which cuts the electric cost of running a \u003cstrong\u003ehydronic heating\u003c\/strong\u003e loop all season.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrop-In Fit:\u003c\/strong\u003e the \u003cstrong\u003eGF 15\/26\u003c\/strong\u003e \u003cstrong\u003erotated flange\u003c\/strong\u003e and \u003cstrong\u003eintegral check valve\u003c\/strong\u003e let the pump stand in for common circulators such as the \u003cstrong\u003eTaco 0015\/0015e3\u003c\/strong\u003e and \u003cstrong\u003eB\u0026amp;G ecocirc 19-14\u003c\/strong\u003e without adding a separate check.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSmart Control:\u003c\/strong\u003e \u003cstrong\u003eAUTOADAPT\u003c\/strong\u003e, \u003cstrong\u003econstant pressure\u003c\/strong\u003e, \u003cstrong\u003eproportional pressure\u003c\/strong\u003e, \u003cstrong\u003econstant curve\u003c\/strong\u003e and \u003cstrong\u003econstant flow\u003c\/strong\u003e modes match the pump to \u003cstrong\u003ezone-valve\u003c\/strong\u003e, \u003cstrong\u003ezone-pump\u003c\/strong\u003e and \u003cstrong\u003eradiant\u003c\/strong\u003e layouts, with setup and diagnostics through \u003cstrong\u003eGrundfos GO\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProtection and Quiet Running:\u003c\/strong\u003e a robust \u003cstrong\u003estartup\u003c\/strong\u003e, \u003cstrong\u003eself-venting\u003c\/strong\u003e function and \u003cstrong\u003edry-run protection\u003c\/strong\u003e help the pump clear air and keep running, at a sound level of roughly \u003cstrong\u003e25 dB(A)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat is the difference between the 92603108 and the 92603115?\u003c\/strong\u003e The \u003cstrong\u003e92603108\u003c\/strong\u003e (\u003cstrong\u003eALPHA 15-58 FR\u003c\/strong\u003e, listed by Grundfos as \u003cstrong\u003eALPHA 15-58 FRC\u003c\/strong\u003e) has the \u003cstrong\u003erotated flange\u003c\/strong\u003e, while the \u003cstrong\u003e92603115\u003c\/strong\u003e (\u003cstrong\u003eALPHA 15-58 FC\u003c\/strong\u003e) has the standard flange. Both are \u003cstrong\u003e115V\u003c\/strong\u003e cast-iron pumps with an \u003cstrong\u003eintegral check valve\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhy do some listings show 8.37 GPM and 11.16 ft while others show 13.6 GPM and 19 ft?\u003c\/strong\u003e \u003cstrong\u003e8.37 GPM at 11.16 ft\u003c\/strong\u003e is the \u003cstrong\u003erated duty point\u003c\/strong\u003e; \u003cstrong\u003e13.6 GPM\u003c\/strong\u003e and \u003cstrong\u003e19 ft\u003c\/strong\u003e are the \u003cstrong\u003emaximum flow\u003c\/strong\u003e and \u003cstrong\u003emaximum head\u003c\/strong\u003e of the \u003cstrong\u003eALPHA 15-58\u003c\/strong\u003e. Actual performance follows the system curve and the control mode selected.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCan the 92603108 replace my existing circulator?\u003c\/strong\u003e Usually, if the required flow and head fall inside \u003cstrong\u003e13.6 GPM\u003c\/strong\u003e and \u003cstrong\u003e19 ft\u003c\/strong\u003e, the \u003cstrong\u003eflange orientation\u003c\/strong\u003e and connection suit the piping, and the system is a closed heating loop. The \u003cstrong\u003ecast-iron\u003c\/strong\u003e housing is not intended for open potable water systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\n\u003cspan style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/span\u003e\u003cspan style=\"font-size: 10.0pt; font-family: 'Arial',sans-serif; color: red; background: white;\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":67700005830834,"sku":"92603108","price":492.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_f3fa581a-a63e-4c0b-884c-605808056bbb.png?v=1791999488","url":"https:\/\/www.gsistore.com\/en-ca\/products\/grundfos-92603108-pump","provider":"GSIstore","version":"1.0","type":"link"}