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2024 International Residential Code
Chapter 32

IRC 2024

2024 International Residential Code

Chapter 32Traps

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Question 1 1.

What is the minimum required thickness for copper or copper-alloy traps according to the IRC?

No. 18 gage (1.0 mm)
No. 20 gage (0.8 mm)
No. 22 gage (0.6 mm)
No. 16 gage (1.3 mm)

Question 2 2.

Which of the following materials is NOT explicitly approved for the construction of traps in the IRC?

Lead
Cast iron
Galvanized steel
Approved plastic

Question 3 3.

Traps are required to have which of the following characteristics?

Movable internal parts for cleaning
Interior partitions for flow separation
Smooth uniform internal waterways and be self-cleaning
Slip-joint connections only on the trap inlet

Question 4 4.

What is the permissible range for the liquid seal of each fixture trap?

Not less than 1 inch and not more than 3 inches
Not less than 2 inches and not more than 4 inches
Not less than 3 inches and not more than 5 inches
Not less than 1.5 inches and not more than 3.5 inches

Question 5 5.

Trap seals of which types of traps require protection from evaporation?

All fixture traps
Traps connected to water heaters
Emergency floor drain traps and traps subject to evaporation
Kitchen sink traps only

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