Thank you. One other question i should have asked...

What advantage does having this valve offer? It allows me to stop the flow to the waterfall (which i can stop with the other valve already), or stop the flow to the rest of the system (skimmer, aerator, and in floor cleaning) - I don't know why I'd want to do the latter. It would also seem that with this current setup I could cut off all output by closing off both valves and I can't imagine that would be good.

Thank you