It is called a sump and its purpose is to prevent sewer odours from permeating private homes and orifices.

Standing water in shower drain. I am asking this specifically regarding my upstairs shower, which always has about 2 inches of standing water in the drain. Pour a cup of baking soda down the drain. How to unclog a shower drain using baking soda and vinegar.

Make sure the drain body is fit with the shower pan and install the drain body into the bottom of the shower pan. For a deeper, bigger blockage, a mix of baking soda and vinegar can work as a natural solution for getting rid of the hair and other harsh chemicals. The reason for the water in the drainage fixture is to prevent rodents and smells entering the building.

Dispose of the waste in a waterproof container. According to the home depot website, pouring a kettle full of boiling water down your shower or tub drain once a week can help prevent clogs. If there is still a clogging issue, call your local plumber.

The first answer is yes: In an empty home or in drains that are infrequently used (such as a basement) you these traps can eventually dry out from evaporation and let sewer gasses seep in. I have water standing in the shower.

It drains, except for one day when it backed up a little. Screwing the strainer off to replace, i found 3of standing water at the bottom of the pipe. Run the water on low to make sure that the drain is now draining properly.

I've taken one quick shower and used little water since i emptied the tank. Pour a cup of vinegar down the drain too. Take the cup of soda and pour it into the drain.