SA Plumber Trade Test Practice Questions - South Africa Artisan Trade Test - Plumber (QCTO NAMB) Exam

What is the primary purpose of the water seal held in a sanitary trap (for example a P-trap or bottle trap)?

To slow the flow of waste water so solids settle To prevent foul drainage gases and odours from entering the building To reduce water hammer in the supply pipe To act as a backflow preventer on the cold-water main

Correct Answer:

To prevent foul drainage gases and odours from entering the building

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