Red Seal Plumbing Practice Exam 2026 – Comprehensive All-In-One Guide for Exam Success!

Question: 1 / 400

A drainage pipe serving a drinking fountain must be:

directly connected to a sanitary drainage system

indirectly connected to a sanitary drainage system

A drainage pipe serving a drinking fountain must be indirectly connected to a sanitary drainage system because this allows for potential blockages or contaminants to be prevented from entering the drinking water supply. Option A, directly connected, poses a risk of cross-contamination between the sanitary and drinking water systems. Option C, connected without a trap, would also not provide protection against backflow or contamination. Similarly, option D, connected with two traps, can create a siphon effect which can also lead to contaminants entering the drinking water. Therefore, option B is the best choice as it ensures the safety and cleanliness of the drinking water supply.

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connected without a trap

connected with two traps

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