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The Everpure Costguard SO20 # DEV910843 / EV910843 Reduces hardness that can cause mineral build-up.
Reduces calcium and magnesium.
May be used on water with up to 30 grains hardness per gal at flow rates up to 0.75 gpm.
Fits standard 20" bowl housings.
Capacity: 1,500 Grains
Pack Size: 1