So i know this is a very old thread, but i saw it on the mixing station thread and had to come check it out. I've decided this is the simplest/most efficient way i can do this. and it looks extremely clean. I plan on copying you

the only difference will be i have rounded barrels vs these super nice ones haha.
I did have a question though. I've circled something in your picture. Could i do a "t" instead of a "T" and have another valve coming off of that to suck water from the tank? this set up will work perfect for getting the water to the tank, but i'm thinking about getting the water out of the tank. I have about 30 feet from my future station to my tank (for now, as i plan on selling my house in the next few months and upgrading my house size --and tank--)
But running a hose off of that extra spot to the tank, then allowing the output to drain that water? I'm new to the mixing station idea and just trying to brainstorm this to do as much as possible. Right now i hook up a hose outside and run a tube to the tank to start the siphon using one of the connector that came with the cleaner, but it's kind of annoying to do, and this would get rid of that.
ALSO--- Now that we are 2 years past this, is there anything you would have done different?
Edit: I don't want to wait until i move to my future house to set this up, as it might not be for a while and i am in desperate need of on hand water storage, currently i have 18 gallons max of DI on hand in my ATO.