Here is what I read...
All Reverse Osmosis systems suffer TDS creep. It is a fact. No name brand is immune not Kent, SpectraPure, Aqua FX, not even ours. Some method has to be provided to make longer system cycles, longer cycles = less TDS creep impact. TDS creep is part and parcel of the Reverse Osmosis process. Total dissolved solids creep. What is it? In what type of application do I need to control TDS creep? How does TDS creep impact my system? Why do I use so many DI cartridges? Why do my pumps, fittings, and system controls require so much maintenance? How does anti tds creep work? What is this TDS creep? TDS creep is the result of the membrane processing water under very low water pressure (system off) conditions. The membrane will still process water, not much water. Water produced under the low water pressure conditions is much lower in quality and higher in tds. In what type of application do I need to control TDS creep? Any time you are replacing evaporation or using extremely small amounts of water at one time. In other words any time your system cycles repeatedly just to make a small amount of pure water. Sump top off is one example of a small volume of water per on - off operation. How does it impact my system? Each time you short cycle, the RO system feeds your DI cartridge much lower quality water than when your RO system is up and running. The lower quality water shortens DI resin life. If your system is pump driven then you risk ruining the pumps and hammering the system to death, on/off/on/off 24 hours per day 7 days per week. Eventually causing fittings and pumps to fail or burst. Why do I use so many DI cartridges? This happens a great deal when you use float valves to replace evaporation. Water evaporates gradually all day . Some electrical systems use timers to delay the operation of the R.O. system. The goal is to run the RO for as long as possible each time you use the system