First, you need to know your water’s hardness. Don’t guess. Guessing is for picking lottery numbers, not for your plumbing. You can buy a simple test strip at any hardware store. Dip it in a glass of tap water, wait a few seconds, and boom—it changes color like a mood ring.
Here’s a quirky fact: Most test strips measure in grains per gallon (GPG). Why “grains”? Because ancient Romans used barley seeds as weights. Seriously. You’re using barley-seed logic to fix your shower. That’s fun to say at dinner parties.
If your water comes from a city supply, you might find the hardness online. Many cities post it like a shameful secret. Check your water bill or the city website. If you have a private well, you get to play detective with your test kit.
Don’t Forget the Iron
Here’s where it gets sneaky. Iron in your water acts like a bully. It adds to the hardness, making your softener work harder. If you have iron, you need to add it to the hardness number. The rule? For every 1 part per million (PPM) of iron, add 4 grains to your hardness level.
Example: Your test says 10 GPG hardness, plus 2 PPM of iron. Do the math: 2 x 4 = 8. So your new setting is 10 + 8 = 18 GPG. It’s like giving your robot a heads-up about a hidden trap. Clever, right?
How To Set Water Softener Hardness Level (Here's a Good Number) - Aqua
If you skip the iron adjustment, your softener gets confused. It regenerates too often or not enough. Your dishes end up spotty, and your hair feels like straw. Nobody wants straw hair.
