Re: Those who don't learn from history...
Large toilet waste pipe was apparently blocked. Caustic chemicals failed to clear the blockage - but a drain rod push eventually gave a satisfying pop. Flushed through ok - job done.
Emergency IT call out. The pipe travelled through the false ceiling in the comms room. The "pop" had been a rubber seal failing - and the modem racks were now dripping with the effluent.
Biting the hand that feeds IT
