Hello,
I have recently moved to a larger tank and larger holding containers and I have found that I need to replace my DI resin just about every week or else my TDS starts creeping up, which raises my ALK in my tank via ATO. I do have well water, so its gross. At the RODI unit, it goes in at about 850ppm, into the DI at around 15ppm and out at 0 ppm with fresh resin, but I will start to see 1-3 TDS after about 20 gallons. I use a booster pump at make at about ~75psi. I just ordered an auto-flush valve, but I also learned more about TDS creep, and I think this is where I am shooting myself in the foot.
I have always set up my RODI to pretty much automatically fill up the storage tank based on a float valve. If the level drops, it fills back up. My ATO is in my fresh storage tank, so every time my ATO runs, the small amount of water is replaced. Seemed nice, but I am now wondering if it is more efficient to only fill the tank once so that I can first flush all of the TDS creep out from a bypass valve.
I guess the question I am trying to answer is how long does it take for TDS creep to really form? If my RODI runs for a few minutes every hour, am I just pumping high TDS water into my resin? If not, what else could I do to possibly extend the life of the resin, because replacing it every week is not practical.
I have recently moved to a larger tank and larger holding containers and I have found that I need to replace my DI resin just about every week or else my TDS starts creeping up, which raises my ALK in my tank via ATO. I do have well water, so its gross. At the RODI unit, it goes in at about 850ppm, into the DI at around 15ppm and out at 0 ppm with fresh resin, but I will start to see 1-3 TDS after about 20 gallons. I use a booster pump at make at about ~75psi. I just ordered an auto-flush valve, but I also learned more about TDS creep, and I think this is where I am shooting myself in the foot.
I have always set up my RODI to pretty much automatically fill up the storage tank based on a float valve. If the level drops, it fills back up. My ATO is in my fresh storage tank, so every time my ATO runs, the small amount of water is replaced. Seemed nice, but I am now wondering if it is more efficient to only fill the tank once so that I can first flush all of the TDS creep out from a bypass valve.
I guess the question I am trying to answer is how long does it take for TDS creep to really form? If my RODI runs for a few minutes every hour, am I just pumping high TDS water into my resin? If not, what else could I do to possibly extend the life of the resin, because replacing it every week is not practical.