Do Floor Drains Require Water Traps?

The floor drain serves the function of drainage, but it must be installed in the right place. Below, I'll introduce whether a floor drain needs a water seal trap.

Does a floor drain need a water seal trap?

Yes, a water seal trap must be installed. A non-odor trap cannot replace the function of a water seal trap. According to regulations, if sanitary appliances do not have a built-in water seal trap, a water seal trap must be installed below the drainage outlet when connected to the sewage pipeline. Most toilets and washbasins have water seal traps, and while the drainage outlet does not need one, the drainage pipe of the floor drain must include a water seal trap.

What are the key points for installing a floor drain in the bathroom?

1. The floor drain is directly connected to the drainage pipe, so it is essential to choose one with good odor-proof performance to prevent foul odors from the sewage pipeline from returning to the room during use, which could impact the user experience.

Additionally, pay attention to the drainage speed of the floor drain; otherwise, if the water flow is large, it could lead to flooding.

2. When purchasing a floor drain, confirm the size of the drainage pipe and choose an appropriate floor drain based on this size. It should neither be too large nor too small, or it will not fit during installation. The installation height of the floor drain must also be determined; typically, the distance between the bottom of the pipe and the floor should be controlled to be over 6 cm.

3. The idea of installing a floor drain only in the wet area after separating dry and wet areas in the bathroom is also incorrect. Since the bathroom often needs to be rinsed, it may be advisable to design a floor drain in the dry area to facilitate water pouring and cleaning. Additionally, if there is an open balcony, a floor drain should be included for drainage; otherwise, rainwater may not drain out properly and could flow into the room.

In summary：the content related to whether a floor drain needs a water seal trap has been introduced. A water seal trap must be installed, and a non-odor trap cannot replace its function. During the installation process, it is important to follow the proper methods to ensure effective drainage.