* Imports into China more than 20 years. Is one of the largest swimming pool industries dosing pumps currently. US blue white pool dosing pump is convenient and efficient design standards, the chemical injection piping system, the side of the mechanical flow control buttons and loop control switch (optional), easy installation. General requirements with on-line automatic water quality monitoring instrument, can also be used alone. Purpose: pool dosing, disinfection, features: all ball bearings, durable lubricating gears click, so running smoothly, quietly and efficiently. Double-ball inlet and outlet check valve cartridge ceramics, chemical resistance PVDF body and accessories, ceramics ball, Viton static sealing and TFE / P tee O-ring seal, no metal springs to use.