Vacuum on a water main. Will the rubber O-rings in a standard water main bell joint hold a vacuum in the main?
asked 20 December 2016 asked by Big Blue (420 points)
I think that the pipe supplier would be the best one to answer you. If you ask them, make sure that you know how much negative pressure that would have to hold.
If properly seated, it should. But there are many factors that can come into play.