They are thirsty. For every gallon of pure water you get, they waste 3 to 4 gallons. It goes down the drain. This is called “reject water.”
Don’t freak out. That reject water is still cleaner than your tap water. It’s just super-concentrated with minerals. You can use it to water your plants. They don’t complain.
Your system has a tiny storage tank. It looks like a propane tank. It holds about 2-3 gallons. Under pressure, it waits for you. Like a loyal, wet puppy.
The “Ah-Ha” Moment
Here’s a mind-bender. RO systems remove everything. Even good stuff like calcium and magnesium. That’s why some people add minerals back in. It’s called remineralization. Water gets a second chance.
You might think you need a PhD to install one. You don’t. Most kits come with color-coded tubes. It’s like adult LEGOs. Just don’t mix up the blue and red tubes. Trust me.
Changing the filters is a quarterly ritual. It takes five minutes. You’ll feel like a mad scientist. You’ll also feel very hydrated.