water chamber tub for philips respironics dreamstation humidifier - 1122520 respironics the water chamber is designed to be hand washed daily with mild soap and warm water. once a week, the chamber may be washed on the top shelf in the dishwasher. this user-friendly chamber is easily accessible. follow these steps to remove the chamber from the humidifier. locate the thin tab on the top of the humidifier. gently push the tab forward to release the humidifier wall. as the panel opens, the clear chamber will be found in the center of the unit. if the water chamber has been filled with water, cautiously remove the chamber with both hands to help prevent water from spilling into the device.