The difference between gravity core and water seal core is that if the water seal is not dried for a long time, the sewage itself will ferment and stink. The principle of mechanical gravity floor drain is that when water flows into the sealing core, the water pressure acts on the gasket at the bottom of the sealing core and the gasket is pressed open. The greater the current, the greater the pressure. The flap floor drain is better, but the water quality discharged by gravity flap floor drain is worse, and there are solids, fibers, hairs and sediments on the ground. The flap floor drain is formed by stamping and stretching, with complex shape and exquisite technology.

Comparison between gravity core and water-sealed core

Gravity flap floor drain has the longest history, and its biggest defect is that when it is not used for a few days, the trap will let the odor and pests of the sewer pipe open straight in because there is no water. Even if some manufacturers raise the trap, there will still be problems of long business trips or long time without deodorization. At the same time, there is another problem. The higher the water seal, the easier it is to hide the dirty things in the core.

These dirty things are difficult to clean up, and because the floor drain itself discharges domestic sewage, the water stored in the trap in the south or in summer will stink in a few days and form a new pollution source.