{"product_id":"grundfos-upm3-auto-25-70-130-high-efficiency-circulator-pump-230v-for-heating-amp-air-conditioning-systems","title":"Grundfos UPM3 FLEX AS 25-70 130 AZA PWM Circulator Pump - 93008970","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 FLEX AS 25-70 130 AZA\u003c\/strong\u003e (part no. \u003cstrong\u003e93008970\u003c\/strong\u003e) is a \u003cstrong\u003ehigh-efficiency circulator pump\u003c\/strong\u003e built to run with or without an external PWM control signal, making it one of the most widely specified pumps for \u003cstrong\u003eunderfloor heating manifolds\u003c\/strong\u003e — from single-port setups up to \u003cstrong\u003e12-port manifold systems\u003c\/strong\u003e. Its compact 130 mm port-to-port body suits tight manifold cabinets and boiler compartments alike.\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;\"\u003e2–52 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 pump can run \u003cstrong\u003ewith or without a PWM signal\u003c\/strong\u003e. Without an external PWM controller connected, it defaults to running at a fixed speed setting rather than adapting automatically like the \u003cstrong\u003eUPM3 AUTO 25-70 130 (part no. 59C93602)\u003c\/strong\u003e. For multi-zone manifold systems with only an on\/off thermostat and no PWM wiring centre, the AUTO variant will generally give better part-load efficiency — see the comparison FAQ below.\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 FLEX AS\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;\"\u003eDual-Mode PWM Operation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eOperates as a \u003cstrong\u003edigital low-voltage PWM-controlled circulator\u003c\/strong\u003e when wired to a compatible manifold controller or wiring centre, while remaining fully functional as a standalone fixed-speed pump when no PWM signal is present — one product covers both scenarios.\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;\"\u003eBuilt for Manifold Retrofits\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eIts control flexibility makes it the \u003cstrong\u003ego-to choice for underfloor heating manifold upgrades\u003c\/strong\u003e, allowing installers to add PWM zone control later without swapping the pump.\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;\"\u003eFitted with the same \u003cstrong\u003eceramic bearing shaft\u003c\/strong\u003e used across the UPM3 range, resisting limescale build-up in hard-water areas for a longer maintenance-free service life.\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 with a manual front-accessible de-blocking screw, so a rotor seized after seasonal shutdown can be freed without dismounting 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;\"\u003eDesigned to operate reliably in \u003cstrong\u003eenclosed cabinets and appliance housings\u003c\/strong\u003e with ambient temperatures up to 70 °C, common in manifold cupboards and boiler compartments.\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;\"\u003eSpace-Saving Design\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6;\"\u003eA \u003cstrong\u003elow space requirement\u003c\/strong\u003e and front-accessible user interface, connectors, and de-blocking screw simplify installation and servicing in confined manifold cabinets.\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;\"\u003e2 – 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;\"\u003e0.04 – 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\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 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, 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 FLEX AS and the UPM3 AUTO 25-70 130?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eThe \u003cstrong\u003eFLEX AS (93008970)\u003c\/strong\u003e is built to accept an \u003cstrong\u003eexternal PWM signal\u003c\/strong\u003e from a manifold controller or wiring centre, letting zone demand vary pump speed directly. The \u003cstrong\u003eAUTO (59C93602)\u003c\/strong\u003e has no PWM input and instead regulates itself automatically via AUTOADAPT. If your manifold has, or will have, PWM zone control wiring, choose the FLEX AS. If you want a standalone pump that self-optimises with no external controller, choose the AUTO.\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;\"\u003eWill this pump work if I don't have a PWM controller?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eYes. Without a PWM signal connected, the \u003cstrong\u003eUPM3 FLEX AS runs at a fixed speed setting\u003c\/strong\u003e rather than adapting automatically. It will still circulate the system correctly, but for multi-zone manifolds without PWM wiring, the AUTO variant typically gives better efficiency across partial loads.\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;\"\u003eHow many manifold ports can this pump support?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eThe UPM3 FLEX AS 25-70 130 AZA is suitable for underfloor heating manifolds ranging from \u003cstrong\u003esingle-port setups up to 12-port manifold systems\u003c\/strong\u003e, depending on system design and pressure requirements.\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 and port-to-port length does it use?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px; font-size:14px; line-height:1.6; background:#FFFFFF;\"\u003eIt uses a \u003cstrong\u003e1½\" BSP (G 2\") threaded connection\u003c\/strong\u003e with a \u003cstrong\u003e130 mm port-to-port length\u003c\/strong\u003e, matching standard UK manifold and boiler 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 the pump need external motor protection?\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 needs no external motor protection or overload relay beyond a standard 230 V single-phase supply.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":63420048834909,"sku":"UPM3-FLEX-AS-25-70-130-AZA","price":117.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/GrundfosUPM325-70130Pump.jpg?v=1770998939","url":"https:\/\/qualityheating.co.uk\/products\/grundfos-upm3-auto-25-70-130-high-efficiency-circulator-pump-230v-for-heating-amp-air-conditioning-systems","provider":"AIZO Quality Heating","version":"1.0","type":"link"}