Thinking about adding a more energy-efficient heating system to your home? Taco's hot water pump is a reliable component to add to the design. Its 007-F5 Circulator is constructed of cast iron and runs at 1/25 horsepower. Taco has taken future servicing into consideration and designed a removable cartridge that houses all of the pump's mechanisms. It's an efficient, low-power system that's compact. The self-lubricating circulator and direct-drive component create a quiet operating system. No mechanical seals are required.