On occasion I have to repair 1 1/2" to 4" PVC piping using repair or slip couplings (couplings without a center stop). The first time I used this type of coulping on a 3" pipe I primed the coupling and pipe and used regular glue but before I could slide it all the way (there was some binding) the glue set and the coupling couldn't be moved further. I cut and removed the coupling and the next time primed only the pipe and used a heavy glue (green can, for use with up to 12" pipe) that sets slower and it went on fine and held tight. On another occasion I used the same method (primed only the pipe ends-not the coupling, used heavy glue, slid and twisted the coupling) but had a leak, my first leak in 20 years. Do you think it was because of the lack of primer or a goof on my part? Any suggestions for using repair couplings?
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PVC repair or slip couplings