Do you know why the pipe below the wash basin (sink) is U-shaped?
The U-shaped pipe can be seen in the above picture.
It has a very special purpose. Since there is a little bend in the pipe, some amount of water always stays in the bend (as you can see in the pictures).
This water acts as a barrier between the drain under the house and the sink above.
This will prevent any foul smell (sewer gas) from rising up into your home/office. This special pipe with a little bend is known as a P-trap.
Important: If you smell something gross in your house, a defective P-trap in your kitchen/washroom could be the culprit.
Good Luck.
:)
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