IPC Sanitary Drainage Systems 3

Question 1

According to the IPC, what is the minimum size for a building sewer serving a building with 150 DFU?

Accepted Answer

4 inches

Answer

A 4-inch building sewer at 1/8 inch per foot slope can handle up to approximately 180 DFU under the IPC building sewer sizing table.

Question 2

What does the IPC specify regarding the use of solvent cement joints on underground drainage piping?

Accepted Answer

They are permitted for ABS and PVC drainage pipe

Answer

The IPC permits solvent cement joints for ABS and PVC drainage piping in both above-ground and underground installations when properly made with approved cement and primer.

Question 3

Under the IPC, what protection is required where drainage piping passes under a building foundation?

Accepted Answer

A sleeve or casing two pipe sizes larger must be used

Answer

The IPC requires that drainage piping passing under or through building foundations be protected with a sleeve or casing to allow movement and prevent damage from structural loads.

Question 4

According to the IPC, what is the minimum diameter for a drainage stack serving water closets?

Accepted Answer

3 inches

Answer

The IPC requires that any drainage stack receiving discharge from water closets be a minimum of 3 inches in diameter.

Question 5

What does the IPC require regarding the grade of underground horizontal drainage piping?

Accepted Answer

A uniform grade throughout the entire run

Answer

The IPC requires a uniform grade throughout the entire run of underground horizontal drainage piping to maintain consistent flow velocity.

IPC - International Plumbing Code Practice Test

IPC - International Plumbing Code Practice Test

IPC Sanitary Drainage Systems 3