Since because of a coincidence the next five days are holidays in my country, I will not be able to get the self aligning bearings for my attraction motor, so I decided to test out the bubbler design I showed some posts earlier. Must say, this design works very well. In an event of flashback, the cap just flies away and I can use it again (of course if I find it ). The cap fits in the PVC tubr very tightly, nevertheless, if I press my thumb on the output tube, the pressure builds up and the cap slowly comes off. That is why I made two videos, the first one shows that the plumbing pipe material is flexible enough and can withstand the explosion. And the other video shows that you can hold the cap in place by using duct tape so that it can withstand greater pressures and still, if a flashback happens, the cap just flies off and everything works fine. I made several such explosions, the bubbler is still working fine. It is just that the cap shoots up so far in the sky, that it is hard to find the cap afterwards I found the cap mostly on the roof of the 2 story building
Lots of fun, enjoy
YouTube - Poor man's bubbler testing
YouTube - Poor man's bubbler testsing part 2