Shock---More surprise on Sept.13

In the early morning, A-chin found that while it rained hard outside, great amount of water is overflow from both toilets, like fountains, and the whole area of the newly completed floor is flooded by 1 inch deep of water.

I called the plumbing contractor, Shiao-Shieh, came to solve this problem.

I climbed up to the roof to seal one roof drain that might cause this problem. Si-Eee accompanied me. Because it really came dawn and it is during the peak of Taiphone "Sinlook".

Then, I called the engineer who was in charge of the construction of the sewer pipe system of this area, to make sure that the trouble is not caused by system back flow.

The mysterious cause of this problem is still a myth. I would like to write a separate story about it.

-How the masonry worker "eat" 3 cm from 30 cm distance.
-How wonderful the "eccentric transition piece pipe spool" to overcome the wrong deed.
-How to persuade the plumber that the toilet fixtures to be installed with "Dry process". (This, actually save us 20000 this time.)
-How powerful is the tool to clean the clogged pipe.
-Why the water overflow from both toilets while the toilet of the neighbor worked perfectly?
-The "wrong rain water pipe connection" guess.
-The "system back flow" theory.
-The vent pipe insufficient theory.--air back flow from the system manhole.

At 3 P.M., the problem solved. I paid Shiao-Shieh all wage he deserved except 10,000 retention money.

Today, everything worked normally. What a great release. The smooth flushing sounds of the toilet is just like music to me.
Thanks God.