The worst plumbing part is the plastic nut on my toilet flex supply line. It broke when I was on vacation and flooded my finished basement. I installed a Floodstop water leak alarm with whole house shutoff valve. I put a leak sensor in each bathroom, the kitchen, and laundry/water heater area. It has alerted me to a few minor leaks and shut off the water before they could cause any damage. It cost me less than $200. I think it should be standard in a new home.