{"product_id":"grundfos-upm3-auto-25-70-130-self-regulating-circulator-pump-59c93602","title":"Grundfos UPM3 AUTO 25-70 130 Self-Regulating Circulator Pump - 59C93602","description":"\u003cdiv style=\"font-size:16px; max-width:900px; line-height:1.6; color:#1A1A1A; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"margin:0 0 20px 0; line-height:1.6;\"\u003eThe \u003cstrong\u003eGrundfos UPM3 AUTO 25-70 130\u003c\/strong\u003e (part no. \u003cstrong\u003e59C93602\u003c\/strong\u003e) is a \u003cstrong\u003eself-regulating, internally controlled circulator pump\u003c\/strong\u003e built for domestic heating and underfloor heating systems that need reliable performance without an external speed-control signal. Powered by a \u003cstrong\u003epermanent-magnet ECM motor\u003c\/strong\u003e with an onboard frequency converter, it uses \u003cstrong\u003eAUTOADAPT technology\u003c\/strong\u003e to continuously read the system and settle on the most efficient proportional or constant pressure curve automatically — no commissioning adjustment required.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e7 m\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eMax Head\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e110 °C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eMax Flow Temp\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e5–52 W\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003ePower Input\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eEEI ≤ 0.20\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eEnergy Index\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e1½\" BSP\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eConnection\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e130 mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003ePort-to-Port\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #B9770E; background:#FEF5E7; padding:12px 16px; margin:0 0 20px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B9770E; margin-bottom:4px; font-size:14px;\"\u003ePlease Note\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.6; font-size:15px;\"\u003eThis is an \u003cstrong\u003einternally (self) controlled\u003c\/strong\u003e pump — it does \u003cstrong\u003enot\u003c\/strong\u003e accept an external PWM signal from a manifold controller or wiring centre. If your system already has a PWM-based zone controller, the \u003cstrong\u003eUPM3 FLEX AS 25-70 130 AZA (part no. 93008970)\u003c\/strong\u003e is the correct externally controlled alternative. See the comparison in the FAQs below before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; color:#008377CF; margin:28px 0 12px 0;\"\u003eWhy Choose the UPM3 AUTO\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eAUTOADAPT Self-Regulation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eThe pump continuously analyses system behaviour over a \u003cstrong\u003ethree-step adaptive process\u003c\/strong\u003e and settles on the optimum proportional or constant pressure curve, removing the need for manual curve selection during commissioning.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eFive Control Modes, 18 Curves\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eBeyond AUTOADAPT, the pump offers \u003cstrong\u003efive selectable control modes across 18 performance curves\u003c\/strong\u003e (proportional pressure, constant pressure, and constant speed), giving installers a manual fallback if adaptive control isn't wanted.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eCeramic Bearing Shaft\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eA \u003cstrong\u003eceramic bearing shaft\u003c\/strong\u003e resists limescale build-up far better than steel equivalents, protecting long-term reliability in hard-water areas without added maintenance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eDouble De-Blocking System\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eCombines \u003cstrong\u003eelectronic de-blocking\u003c\/strong\u003e (up to 25 Ncm starting torque) with a manual front-accessible de-blocking screw, so a seized rotor after seasonal shutdown can be freed without removing the pump head.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eHigh Ambient Temperature Tolerance\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eRated for ambient temperatures up to \u003cstrong\u003e70 °C\u003c\/strong\u003e, making it suitable for installation inside enclosed boiler casings and heating appliance cabinets where space and airflow are limited.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:8px; font-size:15px;\"\u003eCompact Footprint\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eOne of the \u003cstrong\u003esmallest circulator footprints available\u003c\/strong\u003e for an appliance-integrated pump, easing retrofit into tight boiler compartments without redesigning the casing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; color:#008377CF; margin:28px 0 12px 0;\"\u003eTechnical Specification\u003c\/div\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:0 0 24px 0;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eElectrical Data\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eRated voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e1 × 230 V, 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003ePower input (P1)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e5 – 52 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eMaximum current consumption\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e0.07 – 0.52 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eEnclosure class\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003eIP44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eMotor protection\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003eNot required (self-protecting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eLiquid Data\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003ePumped liquid\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003eWater, clean and thin, non-aggressive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eLiquid temperature range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e2 – 110 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eWater quality standard\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003eVDI 2035 compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eMechanical \/ Installation\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eMaximum head\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e7 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003ePort-to-port length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e130 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eConnection thread\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e1½\" BSP (G 2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eMaximum ambient temperature\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e70 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eMaximum operating pressure\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eApprovals\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003eCE, UKCA, VDE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB; width:45%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; font-size:14px; border-bottom:1px solid #E0EDEB;\"\u003e2 year manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; color:#008377CF; margin:28px 0 12px 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 24px 0;\"\u003e\n\u003cdetails style=\"margin:0 0 8px 0; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; padding:10px 14px; font-weight:700; font-size:14px; cursor:pointer;\"\u003eWhat's the difference between the UPM3 AUTO and the UPM3 FLEX AS 25-70 130 AZA?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eThe \u003cstrong\u003eAUTO (59C93602)\u003c\/strong\u003e is a self-regulating pump that runs entirely on its own internal AUTOADAPT logic with no external control input required. The \u003cstrong\u003eFLEX AS (93008970)\u003c\/strong\u003e is designed for systems that already have — or may later add — a \u003cstrong\u003ePWM signal from a manifold controller or wiring centre\u003c\/strong\u003e, letting an external controller vary pump speed by zone demand. If you have no PWM controller and want a set-and-forget pump, choose the AUTO. If your system includes zone-based PWM control, choose the FLEX AS.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin:0 0 8px 0; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; padding:10px 14px; font-weight:700; font-size:14px; cursor:pointer;\"\u003eCan this pump be controlled by an external wiring centre or manifold controller?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eNo. The UPM3 AUTO 25-70 130 is \u003cstrong\u003einternally controlled only\u003c\/strong\u003e and has no PWM input for external speed control. It reads pressure conditions in the pipework itself via AUTOADAPT.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin:0 0 8px 0; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; padding:10px 14px; font-weight:700; font-size:14px; cursor:pointer;\"\u003eIs this a suitable replacement for an Alpha2L or older UPS-series pump?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eYes. The UPM3 AUTO is \u003cstrong\u003edesigned as a direct upgrade path\u003c\/strong\u003e for older uncontrolled or basic circulators such as the Alpha2L and legacy UPS 25-60 130 models, offering significantly improved energy efficiency (EEI ≤ 0.20) in the same 130 mm port-to-port footprint.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin:0 0 8px 0; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; padding:10px 14px; font-weight:700; font-size:14px; cursor:pointer;\"\u003eWhat connection size does this pump use?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eThe UPM3 AUTO 25-70 130 uses a \u003cstrong\u003e1½\" BSP (G 2\") threaded connection\u003c\/strong\u003e with a 130 mm port-to-port length, matching standard UK heating pump fittings.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin:0 0 8px 0; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; padding:10px 14px; font-weight:700; font-size:14px; cursor:pointer;\"\u003eDoes it need external motor protection or overload wiring?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eNo. The permanent-magnet ECM motor is \u003cstrong\u003eself-protecting\u003c\/strong\u003e and requires no external motor protection or overload relay — install per the standard 230 V single-phase supply requirements.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":65219015835997,"sku":"UPM3 AUTO-59C93602","price":137.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/GrundfosUPM325-70130.webp?v=1770998991","url":"https:\/\/qualityheating.co.uk\/products\/grundfos-upm3-auto-25-70-130-self-regulating-circulator-pump-59c93602","provider":"AIZO Quality Heating","version":"1.0","type":"link"}