Once all filters are in, turn the water feed back on. But don’t drink yet! You need to flush the system because new filters have a factory dust vibe. Let the water run from the RO faucet for about 10 minutes. It might sputter and look cloudy—that’s normal.
After 10 minutes, fill a glass. Taste it. If it’s pure, clean, and makes you go “ahhh,” you did it. If it’s weird, run it for another 5 minutes. Still weird? Maybe a filter is loose. Double check.