DC Plumber Practice Questions - District Of Columbia Journeyman Plumber License Exam

Per the IPC, how often must horizontal drainage pipe be supported with hangers?

Every 4 feet Every 6 feet for plastic, every 10 feet for metal Every 4 feet for plastic, every 10-15 feet for metal Every 10 feet for all materials

Correct Answer:

Every 4 feet for plastic, every 10-15 feet for metal

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