Today I saw a Plumber put the Primer on the 3/4" fitting and then the pipe, then he put the Blue PVC Glue on both and inserted the pipe into the fitting while turning the pipe a half turn. My question is that the fitting was new but the pipe was already glued at one time and came apart from 125 lbs pressure on the water system. This was a fitting on the discharge side of the Meter an adaptor and 2" piece of PVC glued together, then an Elbow with a 2" piece of PVC and another Elbow. Long winded explanation but can you sucessfully glue PVC over a Pipe that had PVC Glue on it before but blew apart from high pressure? I have never did this, anyone have experience with this? Thanks for your advice.

If the pipe was sanded to remove all traces of the glue then it's ok. Just to prime over the old glue residue would be a no-no.

NO NO NO

If the pipe is sanded to remove previous 'botch job' it is no longer the proper OD to ensure a friction/pressure fit solvent weld.

A coupling and new piece should have been used - or whatever it took to begin anew.

'THEORETICALLY' a solvent welded joint becomes as strong as the pipe itself as the pipe is actually 'fused' together.

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638