Sizing tools

Pick your softener's control valve to see the rebuild kits, pistons, boards, meters, bypass valves and floats whose listings name it.

Convert a hardness reading in mg/L, ppm or German degrees to grains per gallon, see which hardness band it falls in, and the grains a softener removes each week.

Enter a softener's grain rating, your hardness and household to see how many days it runs between regenerations at an efficient or a full salt setting.

Convert softener resin volume in cubic feet to grain capacity, or a grain rating to the resin volume to buy when you re-bed the tank.

Estimate how much salt your softener uses from your hardness, iron and household, at an efficient or a heavy salt setting, in pounds a week and 40 lb bags a year.

Enter your hardness, iron, household and bathrooms to get the grains a softener must remove each week, and the softeners that keep up at an efficient salt setting.