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. It can also be used in higher head/lower flow heat recovery, open loop solar heating, and domestic water recirculating 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