{"product_id":"grundfos-ups-32-100-cast-iron-three-speed-circulator-pump-for-hydronic-heating","title":"Grundfos UPS 32-100 Cast Iron Three Speed Circulator Pump for Hydronic Heating with Composite Impeller","description":"\u003cp\u003eLarge heating networks combine both high resistance and high volume, requiring a pump that can deliver both. The Grundfos UPS 32-100 meets that demand by pairing the widest bore in the cast iron UPS range with its tallest head rating, suited to commercial risers, district-style heating loops, and extensive multi-zone residential systems.\u003c\/p\u003e\r\n\u003cp\u003eAt full speed the pump delivers 113.8 L\/Min against a maximum head of 10 m, with three speed settings stepping power from 280 W to 345 W and current reaching 1.52 A on a 1 x 240 V supply. The 2 inch connection reduces flow velocity and associated resistance compared with the narrower-bore UPS 25-100 at equivalent volumes.\u003c\/p\u003e\r\n\u003cp\u003eCanned rotor construction runs through the model, with bearings lubricated by the circulating heating water rather than a mechanical seal. Liquid temperature tolerance extends from -25°C to 110°C, and the cast iron housing is intended for closed-loop heating rather than potable circuits.\u003c\/p\u003e\r\n\u003cp\u003eClass H insulation and an IPX4D enclosure reflect the higher thermal and ingress protection demands of running at 345 W continuously. At 180 mm port-to-port, the pump matches the physical footprint of the 1 1\/2 inch UPS 25-100, allowing bore size to be increased during a system upgrade without altering pump spacing.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eLarger 2 inch connections reduce flow velocity and associated resistance at equivalent volumes\u003c\/li\u003e\r\n\u003cli\u003eHead rating of 10 m provides pressure capability for commercial risers, district-style heating loops, and extensive multi-zone residential systems\u003c\/li\u003e\r\n\u003cli\u003eThree-speed selector permits commissioning engineers to match output to actual system requirements\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\u003e180 mm port-to-port body dimension matches the footprint of the 1 1\/2 inch UPS 25-100\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50978282602743,"sku":"95906500","price":1573.05,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-ups-32-100-cast-iron-three-speed-circulator-pump-for-hydronic-heating.png?v=1785223229","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-ups-32-100-cast-iron-three-speed-circulator-pump-for-hydronic-heating","provider":"Foundation Pumps","version":"1.0","type":"link"}