You can also check Harmsco HB-20-50W Calypso Water Filter, Blue and 20" Big Blue Water Filter Purifier System with 5 Micron 4.5 x 20 Pleated Sediment Cartridge for a better comparison at Watersofteneri.com.

1 set of filters with 1 Big Resin Filter for hardness reduction water 19 7/8 inch inch filter housings Operational Range: 40°F-100°F Range: 40-75 PSIIon exchange process Softener Hard ion resin reduce Calcium, in tap and works to remove low concentration of Iron tap any iron 1 PPM it's better with Iron hard scale: softener filters are great way to the your espresso machine, appliances from life of Softening the water before your appliance optimizes performance reduces the damage buildup.High Water Softening of Hardness | flow GPM Refillable Total each.
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