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UI Control Knob for PR System One REMstar Series CPAP & BiPAP Machines

  •  $7.45

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This is the small round UI Control Knob (Dial) that sits on top of all PR System One CPAP & BiPAP machines. The knob is used to control the machine's various settings and functions as well as to turn the machine on and off.

The System One UI Control Knob is dark, charcoal gray in color with a silver inlay around the rim. The sides of the knob are ridged to make them easy to grip.

COMPATIBILITY: This Control Knob comes standard with all "60 Series" System One CPAP & BiPAP machines -- REMstar Plus 260, REMstar Pro 460, REMstar Auto 560, BiPAP Pro 660, BiPAP Auto 760, etc. It can also be used to replace the lighter gray Control Knob found on all "50 Series" System One CPAP & BiPAP machines -- REMstar Plus 250, REMstar Pro 450, REMstar Auto 550, BiPAP Pro 650, BiPAP Auto 750, etc.

INSTALLATION: When an old UI Knob is removed or lost a small metal ring from inside of it can sometimes get stuck on your CPAP machine's knob post. If that ring is present the new UI Knob will not fit properly onto the post. To fit the new UI Knob properly remove the metal ring, either from the post or from inside the new knob, before inserting the new UI Knob onto the machine's knob post.


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Manufacturer Philips Respironics
Part Number(s) 1099581
HCPCS Insurance Code E1399
Manufacturer's Warranty 30 Days
Warranty Notes: Warranty applies to primary item. Accessory and parts warranties may vary. Review manufacturer's documentation for full details.
Typical Country of Origin United States of America

UI Control Knob for PR System One REMstar Series CPAP & BiPAP Machines

5 out of 55 out of 55 out of 55 out of 55 out of 5
My c pap
Written By: Bill Raybold, 2/23/2017
Fit perfect

5 out of 55 out of 55 out of 55 out of 55 out of 5
What a Knob
Written By: anneRkissed, Wisconsin 2/4/2017
First of all, I was delighted that the knob was available. My only problem was figuring out how to remove the clip to allow the new knob to be applied. I saw these reviews and took the advice and removed the clip from the post. (Was afraid of damaging the knob) With a little perseverance I finally succeeded in removing the pin. The knob then fit like a glove.

5 out of 55 out of 55 out of 55 out of 55 out of 5
Exact Knob
Written By: Machine User, Butler, PA 1/10/2017
The right knob for my machine. Had to remove old lock ring (as advised when purchased) from machine to attach new one.

2 out of 52 out of 52 out of 52 out of 52 out of 5
Written By: Tim, Dallas 12/9/2016
The knob doesn't fit properly on the stem and so it wobbles

5 out of 55 out of 55 out of 55 out of 55 out of 5
Cpap machine control knob
Written By: Skeet, Germantown, Md 11/20/2016
This item was received in a timely manner in good condition. It was the correct knob for my machine. Reasonably priced.

5 out of 55 out of 55 out of 55 out of 55 out of 5
It's a perfect replacement.
Written By: Guy T, Vancouver, WA 11/4/2016
I broke the original knob off and needed a replacement. After shopping around, this seemed to be the best value. I had a little difficulty removing the metal insert from the old broken knob out of the machine but once it was all removed this unit fit perfectly.

5 out of 55 out of 55 out of 55 out of 55 out of 5
Great service! Arrived sooner than expected. 😊
Written By: DYS, Virginia 10/29/2016
I wish I had known about being able to buy this little piece for my CPAP. The knob broke off a year and a half ago. Then my CPAP provider said they didn't take care of stuff like that. So glad I found Direct Home Medical!

4 out of 54 out of 54 out of 54 out of 54 out of 5
control knob
Written By: AJC, 10/22/2016
Had to replace --this one fits well

5 out of 55 out of 55 out of 55 out of 55 out of 5
Written By: vern, NM 9/27/2016
lucky to find a knob for cpap machine at a reasonable price, shipping was prompt

5 out of 55 out of 55 out of 55 out of 55 out of 5
Perfect Replacement Knob
Written By: Hal, North Carolina 1/6/2016
After ordering the replacement it arrived within several days. The price isn't bad and the shipping is free! My old metal ring that is referenced in other reviews was the biggest issue. I was able to removed the old metal ring from the post with a small paper clip. I finally got leverage on the curved side of the post. There were a couple of indentations that turned out to be slits in the metal ring that allowed me to get the leverage. Overall, great experience!


View Popular Sleep, Oxygen & Asthma Therapy Search TermsSleep TherapyReplacement Parts for CPAP & BiLevel Machines All PR SystemOne "60 Series" REMstar CPAP & BiPAP Machine PartsSleep, Oxygen & Respiratory Therapy Products by Philips Respironics


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