PCC series cartridges contain food-grade hexametaphosphate that dissolves slowly in water to prevent scale and rust build-up. This type of treatment is recommended for use with ice machines, coffee and vending machines, food service equipment, water heaters, air conditioning equipment and many other types of water processing equipment. To best meet your needs, cartridges are available in four feeder sizes and all materials are FDA grade. They are highly effective at treating scale, corrosion and iron problems for up to six months at various flow rates and feed concentrations. ScaleHardness particles are kept separated so they cannot precipitate and form deposits when heated. Corrosion A protective coating is formed on all metal surfaces, safeguarding against acidity/alkalinity, hardness, chloride turbulence and other factors which affect the corrosion that leads to 'rustingout' of water equipment and pipes. IronDissolved iron, up to 1 ppm, is kept suspended in solution (sequestered), decreasing exposure to air and preventing precipitation, which would cause staining, discoloration and undesirable flavour. PCC1 (4 - 19 LPM) - suitable for all 3/4" plastic, knife-edge seal vesselsPCC106 (4 - 6 LPM) - suitable for insertion into centre core of open end capped vessels.PCC 2-18 (6 - 10 LPM) - suitable for all 10" plastic vessels click here for data sheetPeople who bought this item also bought: