DI Water Users

[the_GUNN_man]

I have been doing a little something to help me get more out of my DI tanks and thought I would pass it on. Some of you might already do it. I came up with this when I needed a lot of DI water one time and my supplier was closed. My tank was reaching TDS levels of 30 ppm. Once it hits 40 ppm it starts to leave spots. Anyway, I was looking at my other spent DI tank in the corner and was wondering how much I could get out of that. I usually stop using them when the reach 25 ppm. Then I got to thinking. What if I hooked them up in series. My city's TDS reading are 160 ppm. I thought if I hooked up one tank it would take it from 160 to around 30. BUT what if I hooked up another one after that. I tried it and it took the 30 ppm back down to 0 ppm. What I do now is take my spent DI tank and put it on a dolly cart and wheel it up to my rig and use the quick connects. It takes about 60 seconds to hook up. You have to monitor the spent DI tank to make sure it doesn't reach higher then your tap water. It saves me a several hundred gallons per tank. I now get my money's worth out of my tanks before I return them. I use TDS meter to check the water. I still have my system so that when I fill on site I just use my primary DI tank. I only use the second one when I am at the shop.

 

[Mark]

Great Idea Steve!

Thanks for sharing it.

 

[hadishon]

Good Idea Steve and thanks for sharing.

I would like to add one point of caution though. It is possible to get your water pure enough that it will dissolve paint on contact. This is very important for car washers as the dealership would get pretty upset to see his cars loosing their color.

I had this lesson taught to me the first time I bought DI tanks. The tanks I baught were designed to get the water to it's purest. Then the water is used for electric curcuits. Before I used the tanks, I took them to a plant to recharge and this is where I was taught this lesson. Thankfully, the place where I took them to get recharge traded resin out to less pure ... so instead of 0 (actually measured in parts per billion) I got 2 or so PPM. Which, won't harm paint. But I do notice it takes wax off cars after a few washings...