DreamStation 2 CPAP Humidifier & Parts from PhilipsThis is a replacement water tank with a lid for the Philips DreamStation 2 CPAP machine. The CPAP humidification option adds warmth and moisture to your air pressure to reduce dryness in your mouth, nose and throat. For the best results replace your water chamber every six months, clean your water chamber daily and only use distilled water Only compatible with the DreamStation 2. DreamStation 2 Humidifier Water Tank with Lid Complete replacement