OK Plumber study guide
OK Plumber · Work through your exam, one topic at a time.
The Oklahoma Plumber License Examination is the trade examination administered through the Oklahoma Construction Industries Board (CIB), the state agency whose stated mission is to protect life and property by licensing and inspecting the related trades for the health, safety, and welfare of the public. Plumbing is one of the trades the CIB licenses alongside building inspectors, electrical, home inspectors, mechanical, and roofing. The OK Plumber study guide has 5 sections and about 1,694 words.
01Plumbing Code, Rules, and Licensing Requirements
Oklahoma administers plumbing through a state licensing statute, board rules, and an adopted model plumbing code (the IPC family) modified by state and local amendments. Expect questions on hierarchy: statute, then board rules, then the adopted code, then local ordinance.
343 words, about 2 min02Water Supply and Distribution
Residential systems must deliver a minimum residual pressure at the fixture - roughly 8 psi for tank-type water closets, much higher for flushometer valves - while static pressure is capped at 80 psi. Above 80 psi, a pressure-reducing valve is required, and any closed system (PRV, backflow preventer, check valve) requires thermal expansion control, usually a expansion tank.
318 words, about 2 min03Sanitary Drainage, Waste, and Venting
Gravity drainage depends on self-scouring velocity: 1/4 inch per foot for pipe 2-1/2 inches and smaller (commonly quoted through 3 inch) and 1/8 inch per foot for 4 inch and larger. Steeper is not automatically better on long runs.
371 words, about 2 min04Fixtures, Fixture Fittings, and Appliance Connections
Fixture questions blend the fixture, its fitting, and its appliance connection. Every potable connection needs backflow protection matched to the hazard: hose bibbs need vacuum breakers, and water-using equipment with a health hazard needs an air gap.
314 words, about 2 min05Fuel Gas Piping, Safety, and Job-Site Practices
The fuel gas code (IFGC family, as amended) governs sizing, materials, installation, and testing. Low-pressure sizing uses the longest-length method with a permitted pressure drop, typically 0.5 inch water column, and a capacity table indexed by pipe size and length.
348 words, about 2 min