Armstrong ASTRO-225SS 1/2 Pump, 1/2" Sweat 3-Speed Open System Circulator - Lead-Free Bronze (110223-303)

"The Armstrong 110223303 (Astro 225BS 1/2"" SWT) is a 3speed wetroter circulator from the Astro 2 line. This collection of circulators can accommodate a wide range of head and flow requirements, making them perfect for a wide range of installations. Plus, because it offers 3 speeds of use, this circulator is very adaptable. When changes to your installation arise ndash; like building additions, a miscalculation in the building's original system design or an added water tank or spa ndash; you can simply change the oprating speed to handle these new requirements.This Armstrong circulator uses an innovative wet roter design that provides a silent operation. It's designed for use in closed hydronic or solar heating systems and is suitable for potable water use. This circulator requires minimal maintenance, as it doesn't require lubrication to operate. Plus, it doesn't have mechanical seals or couplers that require replacing."