The newely redesigned Grundfos pump is a great replacement for other higher priced portable spa circulation pumps. Along with its almost silent operation, it is energy efficient costs only pennies a day to operate. This pump has been completely redesigned with an ingenious rotating volute allowing installation in most plumbing configurations. Includes circulation pump, mounting bracket with screws (which allows for mounting the pump with the discharge in several different locations) and manual. Features: Quiet operation pennies a day to operate 12-18 GPM/540 GPH 230 volts (compatible) 1" barb suction x 1" barb discharge