Pressure relief piping for domestic hot water should be located within what distance from the floor?

The correct choice indicates that pressure relief piping for domestic hot water should be located within 6 inches from the floor. This distance is important primarily for safety and functionality purposes. When water is released from a pressure relief valve, it can be very hot and potentially cause a scalding hazard. By installing the relief piping close to the floor, it helps to minimize the risk of serious burns as the hot water will disperse closer to ground level, where it is less likely to come into contact with people.

Additionally, positioning the piping within this range allows for efficient drainage away from the system, reducing the likelihood of water damage or hazards in the vicinity of the hot water system. Following this guideline ensures compliance with safety codes and enhances the overall safety of the installation in residential settings.