It takes 45 minutes to fill 5 gallons . Is so easy to use. One advice . Take out the filter on the left out (sediment filter)It catches the fine particles. And take out the filter above the system before you flush water in order to prime it. The white filter (sediment filter ) the one on the left is so sensitive and if you get TDS on it from not removing it . You might get in a bad reading .
I love it . I best purchase