What is the object that makes the water blue in the toilet flush

You are talking about the specific point, it is the toilet, the washbasin, the shower in the rain, or something, you have to make it clear.

The one you are talking about is called a "delay valve", not a "piston". This delay valve is rarely used (in public bathrooms), it is. >>>More

Waterproof glue, as the name suggests, is the ...... used for waterproofing >>>More

Come in a hurry! Go and rush!

Generally, the toilet reverse smell is generally not the smell of the toilet is the smell that comes out of the floor drain, this is because the curved pipe under the floor drain is not installed, there should be a deodor-proof curved sewer pipe under the floor drain when decorating, this curved sewer pipe can prevent the odor from returning, the curved sewer pipe under the toilet is done when building a house, and the curved pipe generally does not appear peculiar smell, and the peculiar smell should be eliminated by reinstalling it.