Yup. In houses that are not connected to the central heating, hot water travels through many more systems in your house than the cold water. Some of those syste

Yup. In houses that are not connected to the central heating, hot water travels through many more systems in your house than the cold water. Some of those systems can be pretty nasty e.g. when I disassembled my circulation pump, the water-immersed rotor assembly was leaking black goo.