Thanks to everyone for such great suggestions. As some background, you can think of me as an engineering intern who has been handed this problem. I apologize for my mishandling of jargon or any misunderstanding of fundamentals.
I would like to discourage the use of the 1/2 tubing which I'm sure...
The company I am working for would like to do the following. There is a ~1500 gallon storage tank. In the tank (maintained at 80 to 85% capacity) is about 1200 gallons of di water, continuously cycled by 2 US Electric Motors 10 hp pumps at a rate of 20 and 22 gpm (there are two separate pumping...