Overflow pipe should not be connected to which of the following?

Overflow pipe should not be connected to which of the following?

• A. Drainage ditch
• B. Potable water supply
• C. Public sewer line
• D. Sewer or storm drains

Answer: (D)

Overflow outlets are there to relieve excess water without risking contamination of the potable water system. They must discharge to a location that cannot introduce wastewater or contaminants back into the distribution system. Connecting an overflow to sewer or storm drains creates a cross-connection with wastewater facilities, so during pressure changes or backflow scenarios contaminated water could be drawn back into the system or into the area being served. That risk is why an overflow should never be tied into sewer or storm drains. In contrast, discharging to a drainage ditch may be acceptable under proper controls and local codes if it does not contaminate potable water, while a connection to the potable water supply is obviously inappropriate. The key idea is preventing any path for sewage or contaminated water to backflow into the drinking-water system.

Overflow outlets are there to relieve excess water without risking contamination of the potable water system. They must discharge to a location that cannot introduce wastewater or contaminants back into the distribution system. Connecting an overflow to sewer or storm drains creates a cross-connection with wastewater facilities, so during pressure changes or backflow scenarios contaminated water could be drawn back into the system or into the area being served. That risk is why an overflow should never be tied into sewer or storm drains. In contrast, discharging to a drainage ditch may be acceptable under proper controls and local codes if it does not contaminate potable water, while a connection to the potable water supply is obviously inappropriate. The key idea is preventing any path for sewage or contaminated water to backflow into the drinking-water system.