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1.1 Administration, Permits, and Inspections
Journeyman Plumber Exam
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1 Chapter 1: Administration, Code Enforcement, & Safety
1.1 Administration, Permits, and Inspections 1.2 General Regulations & Building Integrity 1.3 Material Standards & Piping Joining Methods 1.4 Plumbing Math & Water Calculations 1.5 Isometric Drawings & Blueprint Reading
2 Chapter 2: Plumbing Fixtures, Appliances, & Water Heaters
Plumbing Fixtures & Minimum Standards Water Heaters & Safety Devices Special Fixtures & Healthcare Plumbing Fixture Installation & Connection Rules Water Conservation & Flow Rates
3 Chapter 3: Water Supply & Distribution Systems
Water Service Piping & Main Sizing Water Supply Sizing & WSFU Calculations Backflow Prevention & Cross-Connection Control Water Pressure Boosters & Reducing Valves Hot Water Distribution & Recirculation Disinfection & Potable Water Quality
4 Chapter 4: Sanitary Drainage Systems & DFU Sizing
4.1 Sanitary Drainage Fundamentals & DFU 4.2 Drainage Pipe Sizing & Minimum Slopes 4.3 Building Drains, Sewers, & Cleanouts 4.4 Sumps, Ejectors, & Sewage Pumps 4.5 Special Wastes & Chemical Drainage 4.6 Indirect & Special Waste Piping
5 Chapter 5: Plumbing Venting Systems
5.1 Venting Principles & Vent Stack Sizing 5.2 Individual, Common, & Wet Venting 5.3 Circuit, Loop, & Island Venting 5.4 Air Admittance Valves & Combination Vents 5.5 Vent Terminals & Roof Penetrations
6 Chapter 6: Traps, Interceptors, & Separators
6.1 Trap Requirements & Hydraulic Seals 6.2 Trap Seal Protection & Primers 6.3 Grease Interceptors & Hydromechanical Traps 6.4 Oil, Sand, & Flammable Liquid Separators 6.5 Backwater Valves & Flood Protection
7 Chapter 7: Storm Drainage & Exterior Systems
7.1 Storm Drainage Sizing & Roof Drains 7.2 Subsoil Drainage & Sump Systems 7.3 Combined & Separated Sewer Connections 7.4 Rainwater Harvesting & Non-Potable Systems
8 Chapter 8: Fuel Gas Piping & Appliance Venting
8.1 Fuel Gas Piping Materials & Joints 8.2 Fuel Gas Pipe Sizing & Pressure Drop 8.3 Gas Pipe Inspection, Testing, & Purging 8.4 Appliance Venting & Draft Hoods 8.5 Combustion Air & Appliance Location
1.1 Administration, Permits, and Inspections
Key Takeaways Explain This Topic AI
Plumbing permit applications expire if work is not commenced within 180 days of issuance or if work is suspended for 180 consecutive days.
Rough DWV hydrostatic testing requires maintaining a minimum 10-foot head of water column (4.33 psi at base) for at least 15 minutes.
Air testing of DWV piping requires pressurizing the system to 5 psi (34.5 kPa) for a minimum duration of 15 minutes without pressure loss.
Potable water supply systems must be tested hydrostatically at not less than the system working pressure or a minimum of 50 psi for 15 minutes.
The Code Official (Authority Having Jurisdiction) holds legal authority to issue Stop Work Orders, enter premises at reasonable hours, and approve alternative materials under IPC Section 105 and UPC Section 301.
Last updated: August 2026
- Administration, Permits, and Inspections
- 1. Statutory Authority and Administrative Scope
The enforcement of plumbing regulations is governed by model plumbing codes, primarily the International Plumbing Code (IPC) and the Uniform Plumbing Code (UPC) , as adopted and amended by state and local jurisdictions. The ultimate objective of these regulations is to establish minimum sanitary and safety standards to protect public health, safety, and welfare.
The administration of the plumbing code is overseen by the Code Official , often designated as the Authority Having Jurisdiction (AHJ) or Chief Plumbing Inspector. The AHJ is vested with specific administrative and legal powers:
Enforcement and Interpretation: The AHJ enforces all code provisions, issues official administrative interpretations, and adopts regulatory rules to implement code intent.
Right of Entry: Upon presenting proper credentials, the Code Official may enter any building, structure, or premises at reasonable times to perform inspections or enforce code provisions.
Stop Work Orders: If plumbing work is being performed contrary to code provisions, in an unsafe manner, or without required permits, the AHJ is authorized to issue a written Stop Work Order. Work must cease immediately upon service of the notice.
Approval of Alternative Materials and Methods: Under IPC Section 105 and UPC Section 301, the Code Official has the authority to approve alternative materials, design, or methods of construction, provided the proposed alternative is evaluated and found to comply with the intent and equivalence of the code regarding strength, effectiveness, fire resistance, durability, and safety.
2. Plumbing Permits: Mandatory Approvals and Exemptions
No plumbing system, piping, fixture, or appliance can be installed, altered, repaired, replaced, or removed without first obtaining a formal Plumbing Permit from the local building department.
Permit Application and Expiration Rules
Permit applications must include detailed plans, specifications, fixture counts, and system calculations (such as Water Supply Fixture Units [WSFU] and Drainage Fixture Units [DFU]).
- Permit Status Code Condition / Timeline
- Standard Validity Valid while work actively progresses under approved plans
- Inactivity Expiration Expire if work is not commenced within 180 calendar days from issuance date
- Suspension Expiration Expire if work is suspended or abandoned for 180 consecutive days after work begins
- Extension Authority AHJ may grant one or more written extensions of up to 180 days upon justifiable cause
- Work Exempt from Plumbing Permits
While major plumbing operations require permits, model codes explicitly define minor repairs and maintenance operations that do not require a permit, provided the work does not involve altering or rerouting permanent supply or drainage lines:
Clearing Stoppages: Removing obstructions in drains, soil lines, waste stacks, or traps using mechanical snakes or hydro-jetting.
Stopping Leaks: Repairing minor leaks in valves, drains, or pipes, provided the repair does not require replacing or rearranging pipe fittings or structural pipe segments.
Replacing Existing Fixtures: Replacing existing faucets, water closets, lavatories, or valves with direct equivalent fixtures without moving supply lines, waste outlets, or vent connections.
Diagnostic Equipment: Installing temporary diagnostic test equipment or gauges.
3. Required Inspection Sequences
Plumbing installations must pass sequential mandatory inspections conducted by the AHJ before work is covered or placed into operational service. Covering uninspected plumbing work constitutes a code violation, and the Code Official can order the removal of drywall, concrete, or backfill at the contractor's expense. ┌────────────────────────┐ ┌────────────────────────┐ ┌────────────────────────┐
- │ 1. Rough Underground │ ───►│ 2. Rough Top-Out │ ───►│ 3. Final Inspection │
- │ (In-Slab & Trenches) │ │ (Above-Floor Framing) │ │ (Fixtures & Testing) │
- └────────────────────────┘ └────────────────────────┘ └────────────────────────┘
- Phase 1: Rough Underground Inspection
Conducted after building sewer lines, building drains, and underground water service piping are installed in open trenches or under concrete slab locations, but before backfilling, placing gravel, or pouring concrete. Piping must be bedded properly, supported, aligned, and subjected to the required hydrostatic or air pressure test.
Phase 2: Rough-In Top-Out Inspection
Conducted after all interior soil, waste, vent, and water distribution piping has been roughed-in through wall framing, ceiling joists, and floor assemblies, but before wall surfaces (drywall, plaster, lath), insulation, or ceiling coverings are installed. All piping must be fully strapped, firestopped through structural penetrations, capped, and under test pressure.
Phase 3: Final Inspection
Conducted after the building is completed, all plumbing fixtures are set, trapped, connected, and operating, wall plates are installed, backflow preventers are certified, and the system is ready for immediate occupant use. The AHJ verifies proper fixture operation, trap seals, hot water temperature limits, and system integrity.
4. Pressure Testing Protocols and Code Thresholds
To verify structural integrity and leak-free joint assembly, plumbing systems must undergo rigorous pressure testing in the presence of the Code Official during rough-in inspections.
- System Under Test Testing Medium Code Pressure Requirement Minimum Duration
- Rough DWV (Hydrostatic) Potable Water 10-foot head of water column (4.33 psi at base) 15 minutes
- Rough DWV (Pneumatic) Compressed Air 5 psi (34.5 kPa) using calibrated gauge 15 minutes
- Water Supply (Hydrostatic) Potable Water System working pressure or min 50 psi (345 kPa) 15 minutes
- Water Supply (Pneumatic) Compressed Air 50 psi (where permitted by code/mfr) 15 minutes
- Fuel Gas (Pneumatic) Air / Inert Gas 1.5x working pressure or min 3 psi (20 psi for CSST) 10 to 15 minutes
- Detailed Test Procedures
Rough DWV Water Test: All outlets and stack openings are plugged with mechanical or inflatable test balls. Water is introduced through the highest point of the system (typically a roof vent stack) until water overflows at a height of at least 10 feet (3,048 mm) above the section being tested. The water level must not drop for at least 15 minutes.
Rough DWV Air Test: All openings are sealed. Air is pumped into the system until a calibrated pressure gauge reads 5 psi . The test gauge must have increments of 0.1 psi or smaller. The pressure must hold steady without any measurable drop for 15 minutes. Caution: Some manufacturers restrict air testing on plastic DWV piping due to safety hazards from brittle failure under compression.
Potable Water System Hydrostatic Test: Upon completing water supply rough-in, the system is filled with water and pressurized to not less than the working pressure of the system, or a minimum of 50 psi . The pressure must be maintained for 15 minutes without leakage.