Can we install a smaller swimming pool CSI unit in a domestic potable water application and expect the same results as a commercial unit?

No, these smaller swimming pool type CSI units are not designed for facility potable water having larger daily water loads. Typically, these CSI units are physically much smaller, less alloy, do not adapt to varying water conditions, and have small electrodes, meaning they do not provide the performance or durability required for larger potable water distribution systems.