It was almost as Astro said only a lot messier, i got a call about water comming out of a drain, when i arrived there were two people with buckets
trying to bail the place out, when i noticed there was loo paper in the water
i told them to leave it and went to phone dyno rod, next thing the loos started over flowing when flushed and solid matter was observed floating about the factory, dyno rod arrived and did what they do, the water drained away and a huge clean up went into swing, every thing was all most spik and span when the waters started to rise again, the next 3hrs was taken up with dyno rod having no success clearing the bolockage, i had hired a pump to keep levels down, trouble was i had to put the out let pipe through a window as it was not long enough to reach the main sewer, next we had a water tanker with a high pressure (snake) to blast the blockage out, gradually large lumps of white stuff started comming up in the main sewer and the factory started to drain, a huge sigh of relief all round and second clean up starts, i am just about to put the drain cover back on when i notice it is filling up, we lifted the cover in the road down stream from the factory, causing a bit of traffic chaos as it was in the middle of the road, that was allso filling up, so now the whole estate had no drainage, our fondant had blocked the local pumping station.