Imagine a very picky bouncer at a club. That’s an RO membrane. It uses water pressure to push H2O through a semi-permeable sheet. Only the water molecules get through.
Everything else—chlorine, lead, weird tastes, and even microscopic germs—gets kicked to the curb. It’s called “reject water.” Yes, the waste water is literally the rejected party guests.
Fun fact: RO systems create some waste water to stay clean. It’s the price of purity. But modern units are getting smarter and wasting less. Think of it as the system flushing the toilet to keep the faucet pristine.
