Reddit reviews TOOTO 5 PCS Male Straight Pneumatic 4mm M6 Ptfe Tube Push In Quick Connect Fitting PC4-M6 for Reprap 3D Printer Bowden Extruder
We found 4 Reddit comments about TOOTO 5 PCS Male Straight Pneumatic 4mm M6 Ptfe Tube Push In Quick Connect Fitting PC4-M6 for Reprap 3D Printer Bowden Extruder. Here are the top ones, ranked by their Reddit score.
Just ordered this one myself off Amazon.
TOOTO 5 PCS Male Straight Pneumatic 4mm M6 Ptfe Tube Push In Quick Connect Fitting PC4-M6 for Reprap 3D Printer Bowden Extruder https://www.amazon.com/dp/B019RQ5EYE/ref=cm_sw_r_cp_apa_8-oFAbYR6TNMT
You will probably need to replace the fitting. You can search for a PC4-M6 quick connect fitting or buy them here: https://www.amazon.com/gp/product/B019RQ5EYE/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
I think your concern is well founded; just pull back on the blue ring, dislodge the white tube, and reverse the procedure.
Worst case, you are replacing the Bowden tube; they are cheap, and you can order a few spares :-).
https://www.amazon.com/gp/product/B019RQ5EYE/
I don't know if you could heat that up without damaging the push fit part, so...
https://www.amazon.com/dp/B019RQ5EYE/