Yes, getting the bubbles out was an easy task. My new tube has a metal head and therefore the outlet (where you conect the outlet hose on to) must face down (or as ‘good down as it gets down’). A tube with a glass head installs a bit easier (see photos below).
I learned over the years that for me to prevent any airbubbles getting into the tube the top of the water in the container (I use a 20L closed bucket) must be higher then the tube itself (mine is about 50cm higher). I’ve used small tie-wraps to secure the silicone tubes.
A few years ago I installed a polycarbonate ‘window’ above the water outlet, so I can easily check always for any bubbles.
(photo of a similar tube as I have installed, source Aliexpress:)
Old tube with glass head did not have that issue (sort of similar photo, source Aliexpress)
