How to Calculate Water Softener Capacity

How to Calculate Water Softener Capacityのわかりやすいステップを分かりやすく案内します。初心者から上級者まで必見の内容です。

Calculating capacity is easier than you think. First, you need to know your water hardness in grains per gallon (gpg). You can grab a test strip at the hardware store—or bribe a friend with a test kit, your call. Second, figure out your daily water usage. The average person uses about 75–100 gallons per day (showers, toilets, laundry—yes, even that epic bath you take on Sundays).

Now multiply: hardness (gpg) × daily gallons. That gives you your grains of hardness per day. For example, if your water is 10 gpg and your family uses 300 gallons a day, that’s 3,000 grains of hardness daily. Boom! You’re halfway to soft-water glory.

Don’t Forget the “Iron Factor”

If your water has iron (rusty stains? that’s the clue), it’s like adding double trouble to the mix. Each milligram per liter of iron adds about 5 grains of hardness. So a little iron can sneakily spike your capacity needs. Ignore it, and your softener will cry—and your laundry will turn orange. Test for iron just to be sure.

Water Hardness Scale Commercial Water Hardness Water City Of