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Water softener for hot only??
Would there be any issue to install a water softener to feed the hot water heater tank only? So we would have "hard" cold and soft hot at all fixtures. Don't want to redo 5 wall hydrants. Water is actually very good but if Mother is happy everyone is happy and Christmas shopping is done. Existing 120 gal tank is 20 years old fed by heat exchanger FM mod-con boiler. This would be only the maybe the second softener in town. 40 to 50 year old water heaters are not uncommon here. Any suprises down the road that anyone can think of?? Thank you for all input.