Scale Build Up in Plumbing
If your board wants to wants to throw away lots of money, allow lots of necessary maintenance to go undone.
Here is a serious problem. Scale build up can come at any time. It may take 10 years or maybe 40. Depending on the quality of the water in your municipality or city, scale will affect you plumbing and appliances at different times. At times, construction nearby will allow rocks to enter the main water lines. not only will your potable water be affected but maybe your fire safety system as well. I have found numerous large rocks impeding the impellers in fire pumps.
A qualified plumber can send a camera down the line for a quick evaluation. The repairs can be very costly, especially if the fire or domestic water pumps have been damaged.