{"product_id":"grundfos-upm4-primary-circulation-pump-pwm-speed-control-130mm","title":"Grundfos UPM4 Primary Circulation Pump | PWM Speed Control | 130mm","description":"\u003c!-- SEO Product Name: Grundfos UPM4 Primary Circulation Pump | PWM Speed Control | 130mm --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong style=\"color:#008377CF;\"\u003eGrundfos UPM4 primary circulation pump\u003c\/strong\u003e is an \u003cstrong\u003eexternally speed-controlled circulator\u003c\/strong\u003e designed to run as the primary (or sole) pump in Samsung heat pump systems. Speed is taken directly from the Samsung heat pump control board via a \u003cstrong\u003ePWM signal\u003c\/strong\u003e, allowing the outdoor unit to modulate flow precisely to match heating demand rather than running the pump at a fixed speed.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eAvailable in two power variants — the standard \u003cstrong\u003eUPM4 (60W, 8m head)\u003c\/strong\u003e and the higher-output \u003cstrong\u003eUPM4XL (90W, 9m head)\u003c\/strong\u003e — both share the same 130mm port-to-port dimension and 1½\" pipe thread connections, and are supplied complete with a power lead and PWM speed control cable. \u003cstrong\u003eThese pumps only operate under external speed control from a Samsung heat pump control board\u003c\/strong\u003e and are not intended for standalone or manually-controlled use.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px -4px 24px -4px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003e60–90W\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003eMotor power range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003e8–9m\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003eMax head range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003e130mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003ePort-to-port\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003e1½\"\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003ePipe thread\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003ePWM\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003eSpeed control signal\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:19px; font-weight:800; color:#008377CF;\"\u003e1x230V\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px; line-height:1.3;\"\u003eSupply voltage\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:18px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#E0942A; font-size:13px; text-transform:uppercase; letter-spacing:0.04em; margin-bottom:6px;\"\u003ePlease Note\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#333; line-height:1.6;\"\u003eThese pumps \u003cstrong\u003eonly operate when taking external speed control from a Samsung heat pump control board\u003c\/strong\u003e via the supplied PWM cable. They are not designed to run as a standalone, fixed-speed or manually-controlled circulator.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:10px -6px 24px -6px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eExternal PWM Speed Control\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eSpeed is controlled directly by the \u003cstrong\u003eSamsung heat pump control board\u003c\/strong\u003e via a low-voltage PWM signal, allowing precise flow modulation to match system demand.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eTwo Power Variants\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eAvailable as the standard \u003cstrong\u003eUPM4 (60W, 8m head)\u003c\/strong\u003e or the higher-output \u003cstrong\u003eUPM4XL (90W, 9m head)\u003c\/strong\u003e for larger systems and direct circuits.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eSupplied Ready to Install\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eShipped complete with a \u003cstrong\u003epower lead and PWM speed control cable\u003c\/strong\u003e, reducing on-site wiring work.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eCompact 130mm Footprint\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eA 130mm port-to-port length with \u003cstrong\u003e1½\" pipe threads\u003c\/strong\u003e suits straightforward retrofit and new-build plant room installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eMaintenance-Free Operation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eThe pump requires \u003cstrong\u003eno external motor protection\u003c\/strong\u003e and needs no routine servicing under normal operation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#fff; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px; margin:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eWide Liquid Temperature Range\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eSuitable for heating system water meeting recognised water quality standards, supporting reliable long-term operation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eVariant Comparison\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:10px 0 24px 0;\"\u003e\n\u003cdiv style=\"display:flex; background:#008377CF; color:#fff;\"\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-weight:700; font-size:13px;\"\u003eModel\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-weight:700; font-size:13px;\"\u003eMax. Power\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-weight:700; font-size:13px;\"\u003eMax. Head\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-weight:700; font-size:13px;\"\u003ePort-to-Port\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-weight:700; font-size:13px;\"\u003ePipe Thread\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003eGrundfos UPM4 (25-75 130)\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e60W\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e8m (7.5m)\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e130mm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e1½\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003eGrundfos UPM4XL (25-90 130)\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e90W\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e9m\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e130mm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 12px; font-size:14px; color:#222;\"\u003e1½\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eTechnical Specification\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:10px 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; font-size:13px; letter-spacing:0.05em; text-transform:uppercase; padding:10px 16px;\"\u003eApplication\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003ePump Type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003ePrimary circulation pump, externally speed-controlled\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eControl Method\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eLow-voltage PWM signal from Samsung heat pump control board\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eTypical Use\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003ePrimary or sole pump in Samsung heat pump systems\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eSupplied With\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003ePower lead and PWM speed control cable\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; font-size:13px; letter-spacing:0.05em; text-transform:uppercase; padding:10px 16px;\"\u003eElectrical\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eSupply Voltage\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003e1 x 230V +10% \/ -15%, 50\/60Hz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eMotor Protection\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eNot required – protected internally by control box electronics\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eInsulation Class\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eF (EN 60335-1)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eEnclosure Class\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eIP44 (standard, non-drain-hole version)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; font-size:13px; letter-spacing:0.05em; text-transform:uppercase; padding:10px 16px;\"\u003eMechanical \u0026amp; Installation\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003ePort-to-Port Length\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003e130mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003ePipe Thread\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003e1½\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eSpeed Range\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003e563–6300 rpm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eSystem Pressure (Cast Iron Housing)\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eUp to 10 bar (1 MPa)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eStorage Temperature\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003e-40°C to +75°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; font-size:13px; letter-spacing:0.05em; text-transform:uppercase; padding:10px 16px;\"\u003ePumped Liquid Requirements\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eLiquid Type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eClean, thin, non-aggressive heating system water\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F7FAFA; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eWater Quality Standard\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eCompliant with accepted heating system water standards (e.g. VDI 2035)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 46%; padding:9px 16px; font-weight:600; font-size:14px; color:#333;\"\u003eAntifreeze Compatibility\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:9px 16px; font-size:14px; color:#222;\"\u003eWater\/glycol mixtures up to 50% by volume, kinematic viscosity below 10 mm²\/s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin:10px 0 24px 0;\"\u003e\n\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eWhat is the difference between the UPM4 and UPM4XL?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eThe standard \u003cstrong\u003eUPM4 has a 60W motor and 8m maximum head\u003c\/strong\u003e, while the \u003cstrong\u003eUPM4XL has a more powerful 90W motor and 9m maximum head\u003c\/strong\u003e, making it better suited to larger Samsung heat pump systems or direct circuits with higher resistance.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eCan this pump be run without a Samsung control board?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eNo. Both variants are designed to \u003cstrong\u003etake external speed control from a Samsung heat pump control board\u003c\/strong\u003e via the supplied PWM cable and are not intended for standalone or manually fixed-speed operation.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eWhat pipe connection size do these pumps use?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eBoth the UPM4 and UPM4XL have a \u003cstrong\u003e130mm port-to-port length\u003c\/strong\u003e and use \u003cstrong\u003e1½\" pipe threads\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eDoes the pump need external motor protection?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eNo. The \u003cstrong\u003emotor is protected by the electronics in the control box\u003c\/strong\u003e and requires no external motor protection device.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eWhat is supplied with the pump?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eEach pump is shipped with a \u003cstrong\u003epower lead and PWM speed control cable\u003c\/strong\u003e ready for connection to the Samsung control board.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:12px 16px; font-weight:700; font-size:14.5px; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;\"\u003e\u003cspan\u003eWhat is the maximum operating pressure?\u003c\/span\u003e\u003cspan style=\"font-size:13px; color:#008377CF;\"\u003e▼\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#fff;\"\u003eFor cast iron and stainless steel pump housings, the \u003cstrong\u003emaximum system pressure is 10 bar (1 MPa)\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grundfos","offers":[{"title":"UPM4 25-75 130","offer_id":66013809836381,"sku":"UPM4","price":163.0,"currency_code":"GBP","in_stock":true},{"title":"UPM4XL 25-90 130","offer_id":66013809869149,"sku":"UPM4XL","price":213.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/GrundfosUPM4PrimaryCirculationPumpPWMSpeedControl130mm.jpg?v=1790232631","url":"https:\/\/qualityheating.co.uk\/products\/grundfos-upm4-primary-circulation-pump-pwm-speed-control-130mm","provider":"AIZO Quality Heating","version":"1.0","type":"link"}