Walter R. wrote:
I am replacing an ancient water softener which was removed from the pipes 15
years ago.

The house has two water heaters. Apparently there are also some soft water
zones (showers) and hard water zones (kitchen and bar faucets). There are
hot/cold and hard/soft water pipes going in all directions. The pipes are in
the walls.

After I have installed a new softener, how can I determine which faucets
have soft and which ones have hard water?

Thanks

Hi,
Will take a day or two for water tank is filled with softened water.
Take a shower and feel(slippery) or do a load of cloth washing or dish
washing.