I was going through DI resin like crazy, until I got the Flush kit from BRS. It lasts forever now! Totally worth it. Also make sure the first minute or so you don't send the water through the DI stage until it has a chance to drop the TDS to below 10 or so.
I missed the last part, about not sending the first bit to the DI stage. Thanks Juiceman, I'll give that a try. I need to start making a LOT of water for the new tank.
Depending on your water source, the first minute or more of Water is very high TDS, and it will deplete the DI VERY FAST! I haven't had to replace my DI in probably a Year.
I have noticed that with the meter, it is super high in the beginning. I should have thought to do that myself!! My end result was 0 DTS, but I've used a large amount of resin over the last year $$$. Again thanks for pointing that out!
I have a T in the line before the DI stage that T's to a Ball Valve. I open it and let the water go into a Jug until the TDS from the Membrane goes under 10 TDS. Then I shut the Valve and let it go through the DI stage. I give that RO water to the Dogs, since it's still pretty filtered. Been loving the savings!