A common name appurtenance used to keep an accidental flow of wastewater from entering a building is called

A common name appurtenance used to keep an accidental flow of wastewater from entering a building is called

• A. Backwater valve
• B. Barrel
• C. Cleanout
• D. Catch basin

Answer: (A)

The main idea is preventing wastewater from flowing back into a building when the municipal sewer backs up. A backwater valve is a one-way device placed in the building’s main sewer line. It stays open to let normal wastewater flow out, but if the sewer tries to push water back toward the building, the valve closes to stop that reverse flow. This protects lower floors and fixtures from sewage backups during heavy flow in the municipal system. The other options don’t provide backflow protection. A cleanout is just an access point for cleaning the sewer line; it doesn’t stop reverse flow. A catch basin collects surface runoff, not internal sewer backups. A barrel isn’t an appurtenance used to prevent backflow.

The main idea is preventing wastewater from flowing back into a building when the municipal sewer backs up. A backwater valve is a one-way device placed in the building’s main sewer line. It stays open to let normal wastewater flow out, but if the sewer tries to push water back toward the building, the valve closes to stop that reverse flow. This protects lower floors and fixtures from sewage backups during heavy flow in the municipal system.

The other options don’t provide backflow protection. A cleanout is just an access point for cleaning the sewer line; it doesn’t stop reverse flow. A catch basin collects surface runoff, not internal sewer backups. A barrel isn’t an appurtenance used to prevent backflow.