Though technically not a water heater accessory, a whole house leak detection is an option to consider if you’re replacing a system. That’s because water heaters are the most common reason for catastrophic water damage. Installing a whole house Wi-Fi-enabled leak monitoring device not only alerts you to a potential issue, but it will also shut your water off if something seems irregular. Some homeowners insurance policies require these types of devices in order to renew your policy. They also provide significantly discounted rates if your home possesses a leak detection or damage mitigation device.