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Whistling Simplus FF Mask
.0395 inches (1.0 mm)

The one that was to big was 0.0460 inches. (1.16mm)

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(08-30-2014, 07:25 PM)blizardj Wrote: .0395 inches (1.0 mm)

The one that was to big was 0.0460 inches. (1.16mm)


Hi John,
Thanks for the info. A couple of months ago, I switched from
a ResMed Mirage Quattro to the Simplus. I really like the Simplus
much better. I've only experienced the whistling a couple of
times, but wiping the port area took care of it. I just acquired a
2nd Simplus, so I have a spare. When I break it out, I'll watch out
for this behavior. If it appears, I'll know what to do about it.

And BTW, I'm impressed that you have such a collection of "tiny"
drills to be able to find the right size. And here I thought I was
a tool nut! LOL
PAPing in NE Ohio, with a pack of Cairn terriers
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I'm blessed with a wife that enjoys buying me tools... For 34 years...

And no, you can't borrow her....(;-)

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I have a resmed quattro FX full face mask, and found out after 30 minutes of fiddling at 2:40 in the morning, that it's the two long holes on the bottom of the mask making the whistling. If I get my hands on the idiot engineer who designed this mask...
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Your Quattro FX has a port for oxygen connection on the bottom of the mask. It is comprised of two holes and comes with a plug installed in both holes. Apparently the plug has fallen out and gotten lost. The same type of plug on my Mirage Quattro masks will fall out every now and then and so far it wakes me up every time and I have been able to find the plug and re-install it. If you have another Quattro FX you could rob the plug from there or you could tape those 2 holes closed with no problem unless you use oxygen. I do not think that anyone sells a replacement plug.

Best Regards,


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