Liggy, Iron out was never designed to remove massive amounts of iron. Running a snake through your pipes was probably the best solution for you. It's either that or cut out the pipe and replace it which is what most plumbers would do because of the time involved in snaking the pipes out would cost more in labor than replacing would. We get iron up here and lots of it so we are pretty used to dealing with it. I have removed filotration valves that are so clogged with iron that you could soak them for a lifetime and never begin to remove all the rust. They have to be totally dismantled, cleaned with a brush and then rebuilt.