Plumber Red Seal · Question
A plumber is reviewing plans for a new restaurant and notices that a floor drain is proposed to be connected to the potable water supply. What specific National Plumbing Code of Canada requirement is this arrangement violating?
Connecting a floor drain (a drainage fixture) directly to the potable water supply creates a direct cross-connection, which is strictly prohibited by the Nation
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Question: A plumber is reviewing plans for a new restaurant and notices that a floor drain is proposed to be connected to the potable water supply. What specific National Plumbing Code of Canada requirement is this arrangement violating?
Answer options:
- Minimum trap seal depth. ✅ Prohibition of cross-connections.
- Requirement for a cleanout.
- Maximum fixture unit loading.
Correct answer: Prohibition of cross-connections.
Explanation: Connecting a floor drain (a drainage fixture) directly to the potable water supply creates a direct cross-connection, which is strictly prohibited by the National Plumbing Code of Canada. This arrangement poses a severe risk of contaminating the potable water system.
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