I have always been under the impression that you have to wait for several days. Not for worry of leaks but for the chemicals in the glue. Is this not the case? I have been wanting to make a new CLS. But, I didn't want to wait for days to hook it up.
nah jay thats just what is told to do it your selfers. I have worked with a plumbing company before and when we would go in to fix breaks on pvc we would glue and go. Basicaly once the glue hits any form of plastic it has a chemical reaction and strats to dry right away. 90% of all the toxins are released during the setting time and after a couple seconds it is fine. Although most will say to run some throw away water through first before useing but it isn't realy all that necessary to do so.
I realized when I was hooking up my refugium that I'd have no provision for flushing the water before it went into my main tank, so I put it all together except for the last joint and flushed that with tap water. Glued up the last joint and let it set for thrity minute, until I couldn't smell glue any more and fired it up. I did put some carbon to help absorb the organics, and maybe my skimmer increased production for awhile (couldn't really tell) but nothing seemed harmed, and that was a week ago.