Use of plastic pipes restricted by codes. Can be expensive to retrofit. Use of corrosion inhibitors such as polyphosphate. Water Velocity Corrosivity may increase at high velocity due to turbulence that helps DO react faster with the metal surface. May be controllable through pipe design changes and use of low water use appliances, faucets, shower heads, etc.
Water hardness is linked to scale formation and the reduced cleaning efficiency of soaps.
Through water softening and salt removal techniques.