Steelneck - what sort of plastic pipe are you using to make them with the threads in the top and can you use them for colour?
It is 110mm sewage pipe. Yes i use them for color, but since i have not made a light trap at the bottom where the threads are, it is lights out changing the chem-container. (sorry, i wrote C-41 when i meant RA4)
There are basically three kinds of sewage pipes, those made for being dug into the ground (usually in some dull ugly color), the ones made to be built in (often gray as mine example), and those you see under sinks and such (usually white). Do not use the latter ones, they do not block out light enough.
Then there are two kinds of plastic sewage pipes are made from, PVC and PP. PVC is a little easier to find glue (adeshive?) for, epoxi works OK, the PP variant is very hard to get anything to stick to, it is almost as Teflon. But there are glues for that too, but _very_ expensive, like $60 for a tiiiny set of two part bottles.