Our city water is quite good and quite soft but it does get chlorine added and there is still scale. I'd like to install a whole house system in a new home to protect appliances from the scale and remove the chlorine but not at the cost of dropping water pressure. My thought so far was to use a 1"-1.5" inlet SS housing from 3M along with AP420 cartridges. The multi-cartridge housings look like they have sufficient flow and these cartridges appear reasonably priced. I've also seen the enormous EWS units that are far more expensive but of course last 10 years. Can anyone recommend a pragmatic setup to do basic filtration/treatment duties ?