The Taco 009 is designed for a wide range of residential and light commercial higher-head / lower-flow water circulating applications. Typical uses include hydronic heating, radiant in-floor/panel heating and closed-loop solar heating systems. The unique replaceable cartridge contains all of the moving parts and allows for easy service, instead of replacing the entire circulator. Compact, direct-drive, low power consumption design is ideal for high-efficiency jobs. Self lubricating - No mechanical seal - Universal flange dimensions