Plumbing Codes and Regulations Flashcards
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Read the first 7 Plumbing Codes and Regulations flashcards as text
Under the IPC, which backflow prevention device provides the highest level of protection for a high-hazard cross-connection?
Answer: Reduced pressure zone (RPZ) assembly
An RPZ assembly is required for high-hazard connections because it protects against both back-siphonage and back-pressure through a monitored relief port.
According to the IPC, potable water supply piping must be separated from drain, waste, and vent piping by at least:
Answer: No specific separation is required as long as there is no cross-connection
The IPC does not require a specific physical separation distance; it prohibits cross-connections between potable and non-potable systems.
A master plumber is sizing a grease interceptor for a restaurant with two 3-compartment sinks. Which standard governs grease interceptor sizing?
Answer: PDI G-101
PDI G-101 (Plumbing & Drainage Institute) provides the standard sizing method for grease interceptors based on flow rate and retention time.
Under model plumbing codes, an approved water heater pressure relief valve must be set to open at or below:
Answer: 150 psi
Plumbing codes and ASME standards require T&P relief valves on water heaters to open at no more than 150 psi.
Per the IPC, what is the minimum diameter of a stack vent or vent stack that serves a building drain handling more than 100 fixture units?
Answer: 4 inches
IPC vent sizing tables require a minimum 4-inch vent stack when the connected drainage system exceeds 100 DFU.
Which of the following code violations would most likely result in a sewer gas odor inside a building?
Answer: P-trap installed with the outlet higher than the inlet
A trap installed backward or sloped so the outlet is higher than the inlet will not retain a water seal, allowing sewer gas to enter.
Under the IPC, medical gas systems in healthcare facilities are regulated by which standard?
Answer: NFPA 99
NFPA 99, the Health Care Facilities Code, governs the design, installation, and testing of medical gas piping systems.