306A National Plumbing Code of Canada 2

Question 1

What is the maximum number of fixture units that can be connected to a 2-inch horizontal branch according to the Code?

Accepted Answer

6

Answer

4

Answer

8

Answer

12

Question 2

According to the National Plumbing Code of Canada, what type of fitting must be used to change direction in a horizontal drainage pipe?

Accepted Answer

Long-sweep fitting or combination wye

Answer

Short-radius elbow

Answer

Standard 90-degree elbow

Answer

Any available fitting

Question 3

What is the minimum size of a vent stack serving a building with more than 10 fixture units?

Accepted Answer

2 inch

Answer

1¼ inch

Answer

1½ inch

Answer

3 inch

Question 4

How far above the flood level rim of the highest fixture must a vent terminate according to the Code?

Accepted Answer

150 mm

Answer

50 mm

Answer

100 mm

Answer

300 mm

Question 5

Under what conditions does the Code permit the use of an air admittance valve (AAV)?

Accepted Answer

Only when approved by the local authority having jurisdiction

Answer

AAVs are prohibited under all circumstances

Answer

Anywhere a traditional vent would be required

Answer

Only in single-family dwellings

Question 6

What is the minimum pipe size for a building sewer according to the National Plumbing Code of Canada?

Accepted Answer

4 inch

Answer

3 inch

Answer

6 inch

Answer

8 inch