| 摘要 |
PURPOSE:To provide a bath device in which a piping before a three-way ball valve 31 for use in changing-over an additional heating of hot water within a bath tub and a hot water feeding into the bath tub is improved so as not to fulfil the high pressure caused by water hammer, a movement of the three- way ball valve is made smooth and damage of the valve is prohibited. CONSTITUTION:A solenoid valve 34 installed in a water drain hole 60 in a back-flow preventing device 30 is always kept released. Shock wave of water hammer entered into the piping 50 passes through the solenoid valve 34 and is discharged into the over-flow chamber 32 of the back-flow preventing device 30. |
