The recession (not that we are participating) has cause me to work twice as hard and long for less; as a result time has been precious! Finally have a few moments to come up for air!
The RO/DI design was inspired by glassreef(Tom). MY goal was to have the capability to do any thing I might ever need or imagine in the design; stir water in either tank (independently), move water from either tank to the other, drain each tank independently, move water to the reef tank from either or both tanks, maintenance the pump without cutting pipes, and lastly an automated RO top-off system. The true-union valves enable every need I could imagine.... They are the bomb - not a single leak!
The cam lever cap (banjo fitting) is on the return line. I added this and built a hose apparatus that we use to pump water (from either or both tanks) during water changes!!! The controller is setup to stir the water (in either tank) the night before a water change.
On the lower right side you see a second banjo cam lever CAP.
We use the cap when not in use. The drain hose uses a banjo lever cam designed to fit on the end of a 1" hose. They will not come loose or leak! The only metal are the levers and they are aluminum and do not come into constant contact with the salt water.....
The same concept was use to drain the tank with regard to the banjo cam fittings. This hose apparatus has three different length pieces of PVC that are used to drain the tank. One for 25gal, one for 60gal, and one for 120gal. This ensures we do not over drain for the amount of salt that is prepared. The pipe is in the tank (under the water) therefore a glued fitting is not necessary. Now we can get distracted (finish that beer) without
having to stand over the tank when draining..........
The ATO was interesting. The first plan was plagued by Isaac Newton. I plumbed the return to the sump. I have a sensor in the supply tank and the sump. Once it started it would not stop!
Then I re-plumbed it to the over flow box! Isaac-1 Ed-1. The advantage (rationalization) of the new and improved design was that the RO/DI water in the overflow box gave the un-salted water more time and distance to dilute with the tank water!
I have always thought is was unnecessary stress on the tank to have to deal with un-salted water. The dynamics of the un-salted water do reverent it from mixing as well as you might think. Hence the recommendation to stir over night.
more to follow........