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, what is the minimum required air gap between a water supply outlet and the flood level rim of a fixture?
Answer: 2 times the diameter of the supply pipe
The IPC requires an air gap of at least twice the diameter of the supply pipe, but never less than 1 inch.
Which document primarily governs plumbing installations in most US jurisdictions?
Answer: International Plumbing Code (IPC) or Uniform Plumbing Code (UPC)
Most US jurisdictions adopt either the IPC or UPC as their primary plumbing code.
A journeyman plumber encounters an existing installation that does not comply with the current code but was legal when installed. This is known as:
Answer: A grandfathered or nonconforming installation
Installations that were code-compliant when built but no longer meet current code are considered nonconforming (grandfathered) and are generally allowed to remain.
What is the purpose of a sanitary cross fitting, and where is its use restricted?
Answer: It is used in drainage systems only in horizontal-to-horizontal connections where permitted
Sanitary crosses are generally restricted to horizontal drain installations and must not be used in vertical stacks because they can cause cross-flow.
Under most plumbing codes, who is responsible for obtaining the required plumbing permit before work begins?
Answer: The licensed plumbing contractor or permit holder
The licensed plumbing contractor performing the work is responsible for obtaining the permit prior to starting the job.
The minimum slope for a 3-inch horizontal drain pipe under IPC is:
Answer: 1/4 inch per foot
A 3-inch drain pipe requires a minimum slope of 1/4 inch per foot to ensure proper self-scouring flow.
Under IPC, what is the required cleanout location for a building drain that changes direction more than 45 degrees?
Answer: A cleanout must be installed at or near the change in direction
The IPC requires a cleanout at or near each change in direction greater than 45 degrees in a horizontal drain.