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Hi all,

Another question from a new member about to start on the CPAP journey (been diagnosed with sleep apnea and going for second sleep test in a few weeks time and then a trial).

I've been reading that the CPAP humidifiers require distilled water. I live in a city (Melbourne, Australia) that has one of the best public water supplies in the world, so can I use tap water (boiled if necessary) rather than the additional expense of distilled water?

Thanks in advance,

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Hi David - Welcome
Yes you can use regular tap water.  It seems the two main reasons for recommending distilled water is to: 1, reduce mineral buildup in the humidifier tray and 2, appease the manufacturer's lawyers  (barristers).  Normal cleaning will address the first issue.  There isn't much we can do to address the second.  

I am listing a link to help in getting you familiar with the CPAP equipment: https://sleep.tnet.com/equipment

Keep us up to date as to how your treatment progresses.  In the meantime, you may wish to read the forum's Wiki (link at top of page) to gain a better understanding of terms and what to expect.  Additionally, the Useful Links listed below may prove interesting.

Useful Links -or- When All Else Fails:
Posting SleepyHead Charts in 5 Easy Steps
Robysue's Beginner's Guide to Sleepyhead
Apnea Helpful Tips
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Congrats on having excellent tap water!

My city has lousy tap water, so I have a very good filter, and I use that water. No problems. :-)
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Almost all municipal water supplies have some degree of dissolved minerals. I wouldn't worry about it too much if you never let your water chamber run completely dry and soak your water chamber in vinegar periodically to remove any build-up of mineral deposits. I have run a number  of experiments with my ResMed AirSense and tap water with periodic cleaning worked just fine.

Have a restful evening.
"The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane." -- Marcus Aurelius
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I use a water filter for all my potable water as the Gold Coast water supply, while not that bad, is not a patch on Melbourne's. I clean out my humidifier every couple of months
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I'm in Sydney and just use tap water in my Dreamstation without a problem.

And when I'm in Melbourne I use tap water there as well, again with no problem.

I spend a couple of weeks a year down in Melbourne, and also spend time on the road in between there or other places around NSW/Vic. where I just use local tap water in whatever town I'm in. 

I wash my humidifier tank about once a month by hand in lukewarm water with Morning Fresh dish washing liquid concentrate. 

I've been doing this for 12 months now with no problems.
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Thanks to all of you for the replies - much appreciated.

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I do not use any water. It works for me.
For more information explore and read the wiki or just start with the link below.

Just my personal opinion. My posts are not medical advice or a statement of fact. Please consult a qualified physician or other qualified medical personnel. Please comply with all applicable laws, codes, regulations, and protocols.
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It just depends on the minerals in your water.
In my area the minerals leave pinkish stains on everything and difficult to remove so I distill my own. I also use it for drinking after adding minerals so it gets a lot of use.

If your particular minerals cause no problem youre good.
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(05-26-2017, 05:54 AM)sirgaw Wrote: Thanks to all of you for the replies - much appreciated.


Just don't take it straight out of the Yarra. Smile
I don't use my humidifier very often anymore. See what works for you.
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