General Plumbing Regulations Flashcards
7 cards from real Journeyman Plumbers Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General Plumbing Regulations flashcards as text
Under the IPC, which of the following fixtures requires an individual vent?
Answer: A fixture that cannot be wet vented due to its drainage unit load
When a fixture's drainage load exceeds the allowances for wet venting, it must be individually vented.
What is the purpose of a vacuum breaker installed on a hose bibb?
Answer: To prevent backflow of contaminated water into the potable supply
A hose bibb vacuum breaker prevents back-siphonage of potentially contaminated water (from a submerged hose end) into the potable supply.
Per IPC, what is the minimum number of plumbing fixtures required for a business occupancy with 1–15 employees?
Answer: 1 water closet, 1 lavatory
IPC Table 403.1 requires at least 1 water closet and 1 lavatory for occupancies with 1–15 employees.
Which of the following best describes a 'critical level' (CL) marking on a backflow prevention device?
Answer: The level below which the device must not be installed to prevent backsiphonage
The CL mark indicates the lowest point of installation to ensure the device functions correctly and prevents back-siphonage.
When is a pressure relief valve (T&P valve) required on a water heater?
Answer: On all water heaters, regardless of fuel type or capacity
All water heaters must be equipped with a temperature and pressure relief valve to prevent catastrophic failure.
Under IPC, what is the minimum vent pipe diameter allowed?
Answer: 1-1/4 inches
The IPC sets 1-1/4 inches as the minimum diameter for any vent pipe.
A plumber is roughing in a shower with no curb. Under ADA/IPC accessibility requirements, what is the minimum interior shower size?
Answer: 36 inches × 36 inches
The IPC requires a minimum shower compartment size of 36 inches × 36 inches for accessible (curbless) showers.