Is there a single pipe for bathroom bath drainage, should there be a trap?

Whether your bathroom has a single pipe or many pipes, you must have a trap designed to prevent odors from rising in the pipes and from living up in the sewer.

Have you seen the picture, this is an anti-odor device for bathroom bath drainage, called floor drain, and one of this is fine.

It's better to have a trap ......

The trap is still a useful ......It can prevent the smell of the drain from coming back.

If that sewage pipe is alive and put it away when it is used up, then there is no need for a trap ......

If you want to drain the bathroom in the bathroom, you should also have a trap. Because only in this way can it be effective and avoid taste problems after a long time.

The main thing is to prevent the odor from backflowing, and if there is no water seal, the smell will be overwhelming

It is advisable to make a drain bend. Well, in case of carelessness. Hair or a foreign body fall into it. Well, he has a recoil. Easy to handle.

This is a must in order to prevent odors.