Quote:
Originally Posted by BobSobus
C'mon, had they opened the clean out, pressure
would have vented.
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True, but some houses either don't have cleanouts, or they are under a bush, buried, or just cannot be found. Often, when there is a clogged drain, the plumber needs to remove a toilet to clean out the system. It appears that the real problem was that they created too much backward pressure when cleaning the system.