Pay attention to removing the old interior metal ring!
Thank you, CPAP exchange for excellent instructions about removing the old metal ring first, before trying to place the new button. The button fits great.
Written by mebureau, -2019-11-06
No problem. Worked good. Good price
Written by dlowery-58363, Alabama -2019-10-06
Part arrived on time and fit perfectly. Much better price than I found from other websites.
Note: Be sure to read the instructions and look closely for the metal ring that's most likely left from the old knob. If you don't remove the old ring you won't get the new knob on.
Written by jeffjewett1, -2019-09-16
Great. Shipped on time. Button works great. Thx
Written by hkugelman, -2019-08-12
Quick and easy. Great customer service
I ordered the part by Googling for it. This was the least expensive. When I received the part (not too long), it would not fit. So, I emailed customer service. They got back to me right away and instructed me on the proper installation. Works great! Thanks!!
Written by bborghard, NJ -2019-07-03
Price was reasonable and it arrived quickly. Would recommend..
Written by amalvernite-71131, -2019-06-16
Quick, easy and correct
Found the part quickly , it was sent correctly snd the entire process was easy. It fit perfectly
Written by jamesrutkowski, -2019-05-27
The knob works great. It’s perfect, but they should probably include some instructions. Normally you would think just slip the knob in place. BUT NO. I thought I had purchased the wrong knob, because we couldn’t get the knob on. After doing research online, we realized there is a small metal ring to be removed from the machine prior to installing the new knob. Once that was removed, the knob slid right into place. Good Luck.
Written by ethompson69, -2019-05-08
It's a knob it does it's Job without a union
Exciting I will be able to sleep better with my new knob.
Written by dmkieltyka, -2019-03-07
Inexpensive, just the right item
I needed a truly random item - a CPAP machine knob. They had it for a reasonable price, including shipping. Recommended.
Written by meffles, -2019-03-05
Best Cost by far
I needed a replacement controls knob and saw prices in the $25 - $30, which was unbelievable. This was under 25% of that cost.
Arrived quickly and was a perfect fit. Buy with confidence.
Written by hkufahl-38637, -2019-02-21
Written by josmcgowanpi, -2019-01-01
Quick delivery at a very good price!
Written by wsynott, -2018-11-20
Needed a replacement for a broken knob on my cpap. Fit perfectly. Good directions on how to remove existing ring.
Written by rbecich31-28285, -2018-11-04
It fits perfectly. As others mentioned, I had to remove a sleeve that was left on the stem that you fit the knob onto. It is easily pried up with something strong and thin. Price is a bit high for a knob, but it was still the best price I found. The free shipping was also a bonus.
Written by lbirchtree81, -2018-10-24
Very nice item!
Very nice item. Would buy from this stellar again.
Written by lisalynn66, -2018-09-24
Fast service and excellent condition
Written by falcon77772000, -2018-09-18
Quick and perfect fit
Only place I could find this part. Shipped fast.
Written by jaykwalker, -2018-07-31
I had dropped my CPAP packing it into a suitcase on a trip. I didn't recognize that the knob was missing until I got home. Looked online and found this company and the correct knob. Had to ask how to know which series machine I had and was able to resolve the question with the online assistant before ordering. Then when the knob came and had the clamping band in the knob, I needed assurance that I could force it out to fit on the post on the machine. Got the needed info within one day. It is all good! Thank you.
Written by spihlaja, -2018-01-12
Will not fit!!!!!!!!!!!!!!!!!
Written by mrwall48, -2018-01-12
Doesn’t fit well
Keeps falling off. Does not in any way lock into place.
Written by rcanterb1, -2017-10-27
CXC Notes: Thank you for your purchase and for leaving us your feedback. This comment on the replacement knob has been made before and we've found the following to be helpful:
-When replacing your control knob there is often a small silver ring left behind on the post from the original knob fitting
-This silver ring impedes the new knob from fitting securely as it directly restricts the new knob's silver fastening from attaching onto the post
-Using your fingernails or a pair of tweezers to slide off and remove this metal ring will allow the new knob to fit
We'd be happy to provide further troubleshooting on this matter if you still encounter difficulties. We hope this helps and that you have a wonderful day!
Came one day early.
As a previous review stated a metal ring from the old knob had to be removed first. Perfect fit for my cpap machine.
Written by blazer5, -2017-09-18
Fast shipping... Perfect fit... My machine is like new again......
Fast shipping... Perfect fit... My machine is like new again... Very highly recommended seller... Would buy from them again if need be...
Written by dolusic, Michigan -2017-05-17
Did not fit machine
It did not fit machine, even tho it was supposed to fit. It would have cost too much to return.
Written by mickeyboat, -2017-03-15
CXC Notes: The PR SystemOne Series Knob will fit all SystemOne 50 and 60 series machines. If you're having problems using it you might review the following from our site: When an old UI Knob is removed or lost a small metal ring from inside of it can sometimes get stuck on your CPAP/BiPAP 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. -- Hope that helps, Sleep Well!
Just what I needed. Would have been helpful to know the is a metal piece inside it, as that had remained on my machine and I first thought the knob didn't fit. Easy fix once I figured that out.
Written by vicki_cpa, -2017-02-28
Found this knob online, great price, and easy to order. Great service and fast shipping I will definitely order from here again if I need more products
Written by Jim, -2016-11-11
GREAT VALUE...FAST SERVICE
I ORDERED A REPLACEMENT PART FOR MY RESPIRONICS BI-PAP...IT CAME NEW, CLEAN AND WELL PACKAGED....THE SERVICE WAS FAST...3 DAYS START TO FINISH WITH FREE SHIPPING!!!!...THANKS
Written by JIM, -2016-11-05
everything came quickly and in one piece
Written by JR, -2016-08-25
So happy to find you.
I was very happy to find the product and was very pleased with the courteous service and speedy delivery .
Written by Tommy, -2016-06-15
The fitting hole on the underside of the knob cracked ( didn't know how) It kinda still worked , but decided to replace it anyway. Works fine now.
Written by Markg, -2016-02-07
The item fit perfectly and moreover was received promply
Written by Bill, -2015-07-02
PR SystemOne Series Machine UI Knob
Excellent Product. Fits my CPAP perfectly.
Written by Steve, -2015-02-05