ICC F25 Journeyman Plumber Exam (2015 IPC)

Key Concepts

Permits and applications - An annual permit may be issued, in lieu of individual permits for each alteration to an already approved system, to any person/firm regularly employing one or more qualified tradespersons on the premises (106.1.1). The permit holder shall keep a detailed record of alterations (106.1.2). - Construction documents for buildings more than two stories must show penetration locations and the materials/methods maintaining structural safety, fire-resistance rating and fireblocking (106.3.1). - An application is abandoned 180 days after filing unless pursued in good faith; the code official may grant one or more extensions, each not exceeding 180 days, on written request with justifiable cause (106.3.3). - An issued permit becomes null and void if work is suspended or abandoned 180 days; a new permit costs one-half the new-permit fee if documents are unchanged and suspension has not exceeded 1 year (106.5.3). - One set of approved construction documents is retained by the code official not less than 180 days from completion (106.5.6). - Temporary equipment/system permits: limited as to time of service, not more than 180 days (110.1). - Modifications are granted by the code official on application of the owner or owner's authorized agent;…

Key Concepts

Fixture clearances and compartments (Section 405.3.1) - Water closet compartments: not less than 30 inches wide and not less than 60 inches deep for floor-mounted closets; not less than 30 inches wide and 56 inches deep for wall-hung closets. - Adjacent fixtures: not less than 30 inches center to center. The 15-inch dimension is center to a side wall or partition; 21 inches is the clearance in front of the fixture.

Water closet details - Floor flanges (405.4.1): not less than 0.125 inch thick for brass; not less than 0.25 inch thick for plastic; cast iron or galvanized malleable iron also 0.25 inch thick with not less than a 2-inch caulking depth. - Public/employee facilities (420.2, 420.3): elongated bowls, with hinged open-front seats of smooth, nonabsorbent material. - Flush tanks (425.3.1): antisiphon fill valve conforming to ASSE 1002 or CSA B125.3, with the fill valve backflow preventer not less than 1 inch above the full opening of the overflow pipe. Sheet copper tank linings (425.3.3) conform to ASTM B 152 and weigh not less than 10 ounces per square foot.

Key Concepts

Water service sizing and separation - The water service pipe shall be sized to supply the structure in the quantities and pressures required, and shall be not less than 3/4 inch (19.1 mm) in diameter (Section 603.1). - Where water service piping shares a trench with the building sewer, the sewer shall be of materials listed in Table 702.2. If it is not, the water service and building sewer shall be horizontally separated by not less than 5 feet (1524 mm) of undisturbed or compacted earth (Section 603.2). - Two exceptions to that separation (Section 603.2): - A crossing is permitted where the water service is sleeved to a point not less than 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of the crossing, using sleeve material listed in Table 605.3, 702.2 or 702.3. - Separation does not apply where the bottom of the water service pipe, located within 5 feet of the sewer, is not less than 12 inches (305 mm) above the highest point of the top of the building sewer.

2015 IPC | Sanitary Drainage (Chapter 7) and Indirect/Special Waste (Chapter 8)

Key Concepts

Materials and temperature - Where the waste water temperature will be greater than 140°F (60°C), the sanitary drainage piping material shall be rated for the highest temperature of the waste water (702.5). - Solvent-cement joints between different types of plastic pipe (e.g., ABS to PVC) are prohibited (707.1). - PVC solvent cementing: a primer is not required only where the solvent cement is third-party certified to ASTM D 2564 and is used only for joining PVC drain, waste and vent pipe and fittings in non-pressure applications in sizes up to and including 4 inches in diameter — both conditions must be met (705.11.2, Exception). - Lead-caulked joints on hub and spigot cast-iron soil pipe: molten lead poured in one operation to a depth of not less than 1 inch, and shall not recede more than 1/8 inch (3.2 mm) below the rim of the hub (705.4.1).

Key Concepts

Vent connections and grades - Every dry vent shall rise vertically to a point not less than 6 inches above the flood level rim of the highest trap or trapped fixture being vented. Exception: vents for interceptors located outdoors (Section 905.4). - Every dry vent connecting to a horizontal drain shall connect above the centerline of the horizontal drain pipe (Section 905.3). - A connection between a vent pipe and a vent stack or stack vent shall be made not less than 6 inches above the flood level rim of the highest fixture served. Horizontal vent pipes forming branch vents, relief vents or loop vents shall be located not less than 6 inches above that flood level rim (Section 905.5). - Vent and branch vent pipes shall be graded and connected to drain back to the drainage pipe by gravity (Section 905.2). - Where drainage piping is roughed-in for future fixtures, a vent rough-in shall be installed, sized not less than one-half the diameter of the rough-in drain, and the connection shall be identified as a vent (Section 905.6).

2015 IPC — Chapter 10: Traps, Interceptors and Separators

Key Concepts

Fixture trapping (Section 1002.1). Each plumbing fixture shall be separately trapped by a liquid-seal trap. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches, and the horizontal distance shall not exceed 30 inches, measured from the centerline of the fixture outlet to the centerline of the trap inlet. A fixture shall not be double trapped.

Exceptions to 1002.1 worth memorizing: - Exception 2: A combination plumbing fixture may be installed on one trap provided one compartment is not more than 6 inches deeper than the other and the waste outlets are not more than 30 inches apart. - Exception 3: A grease interceptor intended to serve as a fixture trap per the manufacturer's installation instructions may serve as the trap for a single fixture or a combination sink of not more than three compartments where the vertical distance from fixture outlet to interceptor inlet does not exceed 30 inches and the developed length of waste pipe from the most upstream fixture outlet to the interceptor inlet does not exceed 60 inches. - Exception 1: Does not apply to fixtures with integral…

Key Concepts

General rules (Section 1101). Rainwater from roofs and storm water from paved areas, yards, courts and courtyards shall drain to an approved place of disposal; for one- and two-family dwellings, and where approved, storm water may discharge onto flat areas such as streets or lawns provided it flows away from the building (1101.2). Storm water shall not be drained into sewers intended for sewage only (1101.3). Conductors and the building storm drain are tested per Section 312 (1101.4). The size of a drainage pipe shall not be reduced in the direction of flow (1101.5). Connections and changes of direction use approved drainage-type fittings per Table 706.3 (1101.6). Cleanouts are required and follow sanitary drainage cleanout provisions, with an exception for subsurface drainage systems (1101.8). Backwater valves are required as for sanitary systems per Section 715 (1101.9). Roofs are designed for the maximum possible depth of ponding, assuming all primary roof drainage means are blocked (1101.7).