ONE-WAY TICKET
Pressurize with a plunger that pushes but doesn’t pull.
When you insert a plunger into the toilet bowl, you create a seal around the exit of the toilet so that when you push down, a positive pressure is created that moves the blockage downstream. The drawback to this design is that when you pull the plunger back up in preparation for the next push, you create a vacuum that moves the blockage back to its original position.
So, to effectively clear your toilet, you either need a plunger with a stroke volume large enough to move the blockage to a larger cross section of drainpipe with a single push, or you must plunge so aggressively that you not only dislodge the blockage but break it up, which allows the toilet to flush ...
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