{"product_id":"armstrong-106285mf-742-s-57-1-cast-iron-pump-3-4-hp-1ph-ecm-motor","title":"Armstrong 106285MF-742 S-57-1 Cast Iron Pump 3\/4 HP 1PH ECM Motor","description":"\u003cp\u003eDesigned to deliver reliable circulation for residential and light‑commercial hydronic heating systems, this robust cast‑iron pump ensures consistent flow and temperature stability. The \u003cstrong\u003e106285MF-742\u003c\/strong\u003e Armstrong S‑57‑1 model pairs a 3\/4 HP single‑phase ECM motor with a bronze‑fitted cast‑iron body for long‑lasting performance.\u003c\/p\u003e\u003cp\u003eThe pump operates by converting motor torque into steady water movement through a volute and diffuser configuration, allowing the ECM controller to modulate speed for exact flow set‑points while minimizing energy consumption.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Rate:\u003c\/strong\u003e up to 25 GPM, supporting typical zone heating loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Capacity:\u003c\/strong\u003e delivers up to 30 ft of head for efficient pressure overcoming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy Efficiency:\u003c\/strong\u003e ECM motor reduces electricity use by up to 40% compared to standard induction motors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e bronze‑fitted cast‑iron construction resists corrosion and wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Level:\u003c\/strong\u003e low‑vibration design provides quiet operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for boiler return circulation, radiant floor loops, domestic hot water recirculation, and small‑scale commercial boiler systems.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43118607302750,"sku":"106285MF-742","price":4816.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/106285MF_742_image_4c6e34a2-4c7d-4479-9f1c-8248b8cc9891.png?v=1785977836","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-106285mf-742-s-57-1-cast-iron-pump-3-4-hp-1ph-ecm-motor","provider":"National Boiler Supply","version":"1.0","type":"link"}