Heat exchanger for recovering heat from domestic waste water, has tap water channel formed by outer pipe extending around waste water pipe

摘要

A tap water channel (1) extends along the waste water pipe (19) so that heat exchange takes place between the tap water and waste water. The tap water channel is defined by the waste water pipe, an outer pipe (23) surrounding the waste water pipe and two seals (21, 22) connected to the waste water pipe. Independent claims are also included for the following: (1) Waste water removal arrangement, comprising a pipe for connecting to an outlet in a basin such as a shower or bath tub, as well as the above heat exchanger (4); and (2) Shower provided with this waste water removal arrangement.