This lump of oil was refusing to come out into the outside world

Hello everyone! Welcome to the Plumber Story Channel.

The water used on the second floor overflowed into this house.
This was a chronic problem.
Many companies came but could not resolve it.

Among the many houses on the first floor, only this house's sink drain had a problem.
There is a backflow valve in this house that shows that it has had many sink drain problems.
This valve only flows in one direction to prevent the backflow of liquid.
It is not common in our country for such a thing to be installed.
The backflow valve prevents the overflow of water that is not used in this house.

This lump of oil was refusing to come out into the outside world.
It was too strong to break easily.
This malignant tumor in the drain is making me suffer for a long time.

We don't always solve building sewer problems.
Sometimes it fails.
If we don't solve it, we can't charge.

Thanks for watching.
Credits:
Thank you to Diana for assisting with the subtitles.

Видео This lump of oil was refusing to come out into the outside world канала Plumber Story