The CPAP Water Guide: Everything You Need to Know

Last Updated on 2 years

A CPAP machine is a lifesaver for many people who suffer from sleep apnea. However, it’s important to know that not all types of water are safe to use with your CPAP machine. Certain water has minerals in it that can cause damage to the machinery and shorten the lifespan of your equipment. This article will provide you with everything you need to know about what type of water should be used with your CPAP machine, as well as which type should never be used.

Do I Have to Use Water in My CPAP?

Not all CPAP machines require water in order to function. If you have a CPAP machine with a heated humidifier, then you will need to use water in order to produce humidity. Without water, your heated humidifier will not be able to function and will instead blow dry air into your mask.

Why Important to Use Distilled Water for CPAP?

Distilled water is the only type of water that should be used with CPAP.

Distilled water has been purified and filtered to remove all minerals and impurities, which means it’s the best type for your CPAP machine. When you use regular tap or faucet water, tap mineral deposits may infiltrate your breathing passages from the tube when you breathe in from nasal pillows or a mask. The result will be irritation, dryness, and repeated sore throats from attempts to clear them out. You’ll also have silicone parts in your machine wear down more quickly because they’re not designed to handle additives such as calcium, fluorides, and sulfates found naturally in most types of drinking water.

Can I Use Bottled Water?

Bottled water is a decent option for CPAP users because it’s typically filtered or purified already, but you still need to make sure that there are no minerals in the water before using it with your machine.

Can I use tap water with a CPAP Machine?

No, as previously mentioned tap water has minerals in it that can cause damage to your CPAP machine and make the equipment less efficient.

Can I use distilled water with a CPAP Machine?

Yes, you can use distilled water or boiled and cooled tap water for your heated humidifier chamber because it’s already free of any harmful minerals.

Can I use filtered water in my CPAP Machine?

Yes, but only if you’re using a filter that is specifically made for use with CPAP machines. You’ll need to make sure that the filters are changed regularly and properly cleaned as well because this will ensure that your machine stays in tip-top shape while ensuring your safety during sleep therapy.

Can I use spring water in my CPAP Machine?

Yes, but only if it’s been properly purified. The best way to use spring water is by boiling and then cooling the water before putting it in your machine so that any harmful minerals have a chance to evaporate.

Can I use reverse osmosis water in my CPAP?

Yes, reverse osmosis water is also safe for use with your CPAP machine as long as the pH level of the water has been checked to ensure it’s not too alkaline. If you can’t get this information before using it in your humidifier chamber, then make sure that you change out the tank at least once a week and cleanse all tubing thoroughly every day.

When it comes to using water with your CPAP machine, always err on the side of caution and make sure that you’re using distilled or purified water whenever possible. This will help to ensure the longevity of your equipment and keep you safe during sleep therapy. For more information or questions about this topic, please consult with your doctor or respiratory therapist.

What about adding Essential oils to Humidifier?

Adding essential oils to your CPAP humidifier can be dangerous and cause respiratory problems. Do not add any essential oils to your humidifier, even if they are distilled or filtered.

What water to use when traveling?

If you’re traveling with CPAP and don’t have access to distilled water, you can use bottled water as long as it doesn’t have any minerals in it. If you’re not sure if the water is mineral-free, then you can boil the water before using it with your CPAP machine. Just make sure that it has cooled down completely before adding it to the humidifier chamber.

For more information on this topic or others related to CPAP therapy, please consult with your doctor or respiratory therapist. They will be able to provide you with specific instructions on how to best use your machine and ensure a good night’s sleep.

How to Make Distilled water for CPAP?

If you want to make distilled water for your CPAP machine, it’s a fairly simple process. All you need is a pot of water, a stovetop, and a container to store the distilled water in.

  • Bring a pot of water to a boil on the stovetop
  • Once boiling, remove from heat and let cool for about 30 minutes
  • Pour the cooled water into a clean container and store it in the fridge or use it immediately with your CPAP machine

If you’re traveling and don’t have access to distilled water, you can use bottled water as long as it doesn’t have any minerals in it. Just be sure to check that there are no minerals present before using them with your humidifier chamber.

What happens if your CPAP runs out of water?

Do not, under any circumstances, run your CPAP machine without water. Not only will you risk burning out the motor, but also there is a possibility of contaminating the air stream with bacteria and other contaminants from inside your humidifier chamber.

How often change CPAP water?

It’s best to cleanse all tubing and change the water in your CPAP machine on a daily basis. This will help to ensure that you’re getting the most out of your therapy and that your machine is functioning properly.


Whether you’re traveling and don’t have access to distilled water or your machine needs periodic cleaning, it’s important that you know which types of water are safe for use with CPAP machines. In this article, we’ve outlined the different types of water that can be used in these situations as well as those not suited for use. For more information on how to make distilled water at home and what steps should be taken when using tap or bottled waters, consult with your doctor or respiratory therapist. Your health is our number one priority so if there‚Äôs anything we can do to help ensure it stay healthy during sleep therapy, please reach out!

6 thoughts on “The CPAP Water Guide: Everything You Need to Know”

      1. I bought a distiller from AMAZON for about 85 .00 CDN. I distill about five cleaned plastic 1gallon milk bottles or vinigar bottles. The distiller machine is simple to use and cleans the water real good as you will see in the bottom of the distiller.I wash the distiller after each use with vinager or CLR then rince real good.This is a perfect machine. I have used it for 4 years with no problems.Thr machins comes wuth its own distilled water container that I use to fill the distiller with. Happy distilling, LOL dont get cought making MOON SHINE, LOL.

  1. ALTON Edward KING

    After I open a store-bought gallon of distilled water, is there a number of days I should not use the water from the opened container in my CPAP machine?

  2. thank you, my definition of distilled H20 is much different than what yours is. complete boiling of the water and captor the vapor and condense it, is distilled water to me. how does just boiling the water make it distilled

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