{"product_id":"grundfos-ups-25-100-cast-iron-three-speed-circulator-pump-for-multi-zone-heating","title":"Grundfos UPS 25-100 Cast Iron Three Speed Circulator Pump for Multi-Zone Heating with Composite Impeller","description":"\u003cp\u003eHeating circuits with significant pipe resistance, whether from a tall building riser or an extensive multi-storey radiator layout, require more head than a standard domestic circulator can generate. The Grundfos UPS 25-100 is built for that higher-resistance category, with a 10 m head rating at the top of the cast iron UPS range.\u003c\/p\u003e\r\n\u003cp\u003eAt its highest speed setting, the pump delivers 111 L\/Min against a maximum head of 10 m, drawing up to 345 W and 1.52 A on a 1 x 240 V supply. Three selectable speeds step power from 280 W upward, letting the pump be run below its maximum during commissioning while retaining the reserve head for peak load conditions.\u003c\/p\u003e\r\n\u003cp\u003eThe canned rotor motor construction lubricates its own bearings using the circulating heating water, removing the mechanical shaft seal from the design. Liquid temperature tolerance runs from -25°C to 110°C, and the cast iron housing is built for closed-loop systems rather than potable water.\u003c\/p\u003e\r\n\u003cp\u003eGiven the higher power draw, insulation class steps up to H rather than F, and the enclosure carries an IPX4D rating for improved ingress protection. At 180 mm port-to-port with 1 1\/2 inch connections, it retains a familiar footprint for installers working with the smaller UPS 25 models.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eHead rating of 10 m provides pressure capability for tall building risers, multi-storey radiator layouts, and resistance-heavy heating circuits\u003c\/li\u003e\r\n\u003cli\u003eThree-speed selector permits commissioning engineers to run below maximum during set-up while retaining reserve head\u003c\/li\u003e\r\n\u003cli\u003eCanned rotor design with self-lubricating bearings eliminates the mechanical shaft seal\u003c\/li\u003e\r\n\u003cli\u003eClass H insulation (180°C) supports continuous operation at full 345 W load\u003c\/li\u003e\r\n\u003cli\u003eIPX4D enclosure rating provides ingress protection against splashing water and dust\u003c\/li\u003e\r\n\u003cli\u003eCast iron housing specified for closed-loop heating applications where potable water approval is not required\u003c\/li\u003e\r\n\u003cli\u003eLiquid temperature tolerance from -25°C to 110°C covers standard radiator circuits and higher-temperature boiler installations\u003c\/li\u003e\r\n\u003cli\u003e180 mm port-to-port body dimension aligns with standard domestic heating pipe centres\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50978282569975,"sku":"95906480","price":1429.75,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-ups-25-100-cast-iron-three-speed-circulator-pump-for-multi-zone-heating.png?v=1785223227","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-ups-25-100-cast-iron-three-speed-circulator-pump-for-multi-zone-heating","provider":"Foundation Pumps","version":"1.0","type":"link"}