Now you need to know how much water your household uses daily. The standard rule is 80 gallons per person per day, but let’s be real—your teenager probably uses 400 gallons just perfecting their shower playlist. Adjust: for each person, assume 80 gallons, but if you have a teenager, double it and add a prayer.
Also, count any water-guzzling appliances. A washing machine is like a thirsty elephant, and a dishwasher is a modest camel. If you have a pool, a hot tub, or a secret underground aquarium, add 50 gallons per day for each. I’m not judging—just plan for it.
How To Size A Water Softener? : Best Water Softeners for Your Home – GXSSB