AZ Plumber study guide
AZ Plumber · Work through your exam, one topic at a time.
The Arizona plumber credential is a state-issued license administered through the Arizona Registrar of Contractors. It authorizes an individual or business to perform plumbing contracting work for the public in Arizona, covering installation, alteration, repair, and replacement of potable water distribution, sanitary drainage, venting, storm drainage, fixtures, water heaters, gas piping, and related appurtenances. The AZ Plumber study guide has 10 sections and about 2,789 words.
01General Regulations, Code Administration, and Licensing Requirements
Plumbing work is governed by a layered system. A model code (such as the Uniform Plumbing Code or International Plumbing Code) provides the technical text; a state or local jurisdiction adopts it, often with amendments; and an administrative chapter sets out who may perform work, how permits are obtained, and how inspections are conducted.
363 words, about 2 min02Piping Materials, Fittings, Joints, and Supports
Candidates must know which materials are approved for potable water, drain-waste-vent (DWV), and gas, and where each is prohibited. Common potable materials include copper, PEX, CPVC, and galvanized steel; lead and some plastics are prohibited.
320 words, about 2 min03Plumbing Fixtures, Fixture Fittings, and Fixture Traps
Fixtures must be approved, have smooth and impervious surfaces, and be installed with proper clearance and access. Every fixture that discharges to the drainage system needs a trap, with limited exceptions (some fixtures with integral traps or those discharging to a floor drain).
307 words, about 2 min04Water Supply and Distribution Systems
Water supply design balances pipe size, pressure, and flow. Candidates must understand fixture units, developed length, and pressure loss from friction and elevation.
273 words, about 1 min05Sanitary Drainage, Venting, and Storm Drainage
Sanitary drainage relies on gravity, proper slope, and adequate venting. Horizontal branches slope toward the stack (commonly 1/4 inch per foot for small pipe).
255 words, about 1 min06Traps, Interceptors, Backflow Prevention, and Cross-Connection Control
Traps protect the building from sewer gas; interceptors protect the sewer from grease, oil, sand, and other materials. Grease interceptors are required for commercial kitchens, and their sizing depends on fixture flow and retention time.
280 words, about 1 min07Water Heaters, Temperature Control, and Thermal Expansion
Water heaters require proper clearances, combustion air (for fuel-fired units), seismic strapping where required, and a temperature and pressure relief (T&P) valve. The T&P discharge must terminate safely, typically to a drain or exterior, and must not be capped or reduced.
261 words, about 1 min08Fuel Gas Piping and Gas Appliance Connections
Gas piping uses black steel, corrugated stainless steel tubing (CSST), and approved polyethylene for burial. Sizing depends on load, length, and pressure.
264 words, about 1 min09Isometric Drawings, Plan Reading, and System Layout
Candidates must read floor plans, riser diagrams, and isometrics. Plans show fixture locations and pipe routes; risers show vertical relationships; isometrics show three-dimensional routing.
236 words, about 1 min10Safety, Tools, and Job-Site Practices
Plumbing work involves hazards from confined spaces, trenching, soldering, and power tools. Candidates must know the basics of personal protective equipment, lockout/tagout, and confined-space entry rules.
230 words, about 1 min