Why is it important to avoid cross-connections at fixture connections such as taps and beverage machines?

• A. To prevent backflow contamination of the potable water supply.
• B. To improve taste of the water.
• C. To reduce water pressure in the system.
• D. To simplify installation.

Answer: (A)

Cross-connections at fixtures create a potential path for contaminated fluids to enter the potable water supply. If the system experiences a pressure drop or backsiphonage, water from a non-potable source such as a beverage machine or cleaning solution could be drawn back into taps and the main supply. Preventing these cross-connections is essential to keep drinking water safe, so backflow prevention devices or air gaps are used to stop any reverse flow. The other options don’t address this safety risk—taste, reducing pressure, or easier installation do not prevent contaminants from entering the potable system.