<p>I have a Creality Ender 3. I've unscrewed the coupler from the drive assembly, but can't get it loose from the tube.  The hot end coupler came free easily.</p>
<p>I compress the rubber gasket, but it stays tight.</p>
<p>Are these manufactured to be replaced every time?  My new Bowden tube didn't come with a new coupler.
I see that the couplers are sold with or without the tubing.</p>

[{'answer_id': 17910, 'author': 'Mick', 'author_id': 3953, 'author_profile': 'https://3dprinting.stackexchange.com/users/3953', 'pm_score': 2, 'selected': False, 'text': '<p>After depressing the retaining ring, try pushing the Bowden tube further in to the coupler. This should disengage the internal sprung clip, and allow removal of the Bowden tube.</p>\n<p>Good quality pneumatic couplings should allow many insertion and removal cycles, although the couplings that Creality use have a reputation for early failure.</p>\n'}, {'answer_id': 17914, 'author': 'Lee', 'author_id': 30746, 'author_profile': 'https://3dprinting.stackexchange.com/users/30746', 'pm_score': 2, 'selected': False, 'text': '<p>Success!  better tools and brute force did the trick.</p>\n<p>I threaded the tube through the hole in a steel wrench handle, then clamped the end in sturdy forceps.  That gave me enough grip at each end to pull it apart.</p>\n<p>Thanks for all the suggestions and for letting me know it IS supposed to come apart.</p>\n<p>I also ordered Capricorn tubing, pneumatic couplers, and enough other printer toys...er, upgrades... to get free shipping.  Next time should be easy!</p>\n'}]
['https://3dprinting.stackexchange.com/questions/17904', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/30746/']