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What are the advantages and disadvantages of both systems of joints for "non-pressure" pipes that are buried?
O-ring joints are more expensive, but easier to do on buried pipes.
Glue on the other hand is permanent (that is a plus and a minus at once).
What else?
Typically, o-ring fittings are used for larger diameter pipes (4 inch and larger) where the runs consist of longer distances with a low density of fittings. Examples would be outside of the building civil work and inside (below grade) storm drainage.
When you have smaller diameter pipes and a high density of fittings, such as a bathroom group, glue fittings would be used.
Some advantages of o-ring fittings are:
Some advantages of glue fittings are:
As a licensed civil engineer, I would add that longer straight runs would be better with gasketed pvc (probably only available in +4" sizes) due to thermal expansion.
