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How to Fill a CPAP Water Chamber?

Published in CPAP Maintenance 3 mins read

To fill a CPAP water chamber, especially for models like the ResMed AirSense 11 mentioned in the reference, you typically remove the chamber from the device, open its lid, fill it with water up to the designated maximum fill line, securely close the lid, and then reinsert it back into the CPAP machine.

Simple Steps to Refill Your CPAP Humidifier

Keeping your CPAP humidifier chamber properly filled is essential for comfortable therapy, preventing dryness, and maintaining optimal humidity levels throughout the night. The process is straightforward and involves a few key steps.

Here's a general guide based on the provided reference for the ResMed AirSense 11:

Step-by-Step Filling Process

  1. Remove the Water Chamber: Gently pull the water chamber straight out from the side of your CPAP device. The reference notes that the ResMed AirSense 11 chamber has a built-in gasket and flip-top lid.
  2. Open the Lid: Flip open the lid of the water chamber.
  3. Fill with Water: Carefully fill the chamber with water. It is generally recommended to use distilled water to prevent mineral buildup, although the reference doesn't specify the water type. Fill up to the max. line, but do not overfill.
  4. Close the Lid: Clip the top back into place securely to ensure the lid is properly sealed.
  5. Reinsert the Chamber: Slide the filled water chamber back into its position on the side of the CPAP machine until it clicks or sits flush.

Important Considerations

  • Water Type: While the reference doesn't mention it, using distilled water is widely recommended by CPAP manufacturers. Tap water contains minerals that can accumulate in the chamber and on the heating plate, potentially damaging the device and requiring more frequent cleaning.
  • Max Fill Line: Always adhere to the maximum fill line indicated on the chamber. Overfilling can lead to water entering the air tubing or the CPAP machine itself, which can cause damage.
  • Daily Filling: It's a good practice to empty any remaining water and refill the chamber with fresh distilled water daily for hygiene and optimal performance.
  • Cleaning: Regularly clean your water chamber according to the manufacturer's instructions (usually weekly) to prevent mold and bacteria growth.

Following these simple steps ensures your CPAP humidifier functions correctly, providing comfortable and effective therapy.

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