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Armstrong Astro 2 Series - 220SSU - 3-Speed Wet-Rotor Circulator - 1 1 /4 npsm Union (220SSU)* Overnight Shipping Available! 
Armstrong Astro 2 three speed circulators provide unmatched performance over a wide range of head and flow requirements. The three-speed design allows users to match the requirements of an installation exactly. Lead-free bronze and stainless steel models of Astro 2 certified <0.25 weighted average percent lead (nsf 61 Annex g) and complies with California Health and Safety Code Section 116875 (commonly known as ab1953). Astro 2 units are etl listed for the US and Canada and conform to ul std. 778 and Canadian electrical safety standards csa std. c22.2 No. 108-01. Models are available with union, sweat or flange connections. Models are also available with rotated flanges for installation in tight locations, where clearance is an issue. Available in Cast iron (closed system), Stainless steel (open system) and Lead-free bronze** (open system).Key Features:
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