Guttation manner null of the coming attaching hot water supply bath tub which is forced

摘要

PURPOSE:To prevent foul residual water in a circulation additional-heating pipe from being mixed into bath water when a bathtub is used for the next time because germs contained in bath water grow in the residual water. CONSTITUTION:When it is detected that the water level in a bathtub drops below a circulation port and remains unchanged for a specified time period, a hot-water supply solenoid valve is opened to feed water into the bathtub through a circulation additional-heating pipe by a specified amount or for a specified time period, and the residual water in the circulation additional-heating pipe is pushed out by the pressure of supply water and replaced with clean supply water.