So I installed the PVC DWV lines for a wet bar and I put a temporary cap where the P-trap would go as the drywall isn't installed yet. I took the cap off recently and I got a big whiff of that strong primer/glue smell. It went away after that, but I tried it again later and the same thing happened.
How concerned should I be given that the warnings on the labels talk about how the fumes could be explosive? It makes sense that the fumes would be trapped in the pipes as some of the glue will inadvertently get pushed into the pipe at sealing time.