LA Plumber study guide
LA Plumber · Work through your exam, one topic at a time.
The Louisiana Journeyman Plumber Licensing Examination is the state-level credentialing test that a plumber working under a licensed master must pass to be recognized as a journeyman in Louisiana. It is administered through the State Plumbing Board of Louisiana, which sets eligibility, application procedures, and the current testing arrangements. The LA Plumber study guide has 9 sections and about 2,806 words.
01General Plumbing Regulations, Code Administration, and Permits
This domain checks whether you know who may perform plumbing work in Louisiana, when a permit is required, how plans are reviewed, and how inspections and appeals work. The state plumbing law and the locally adopted plumbing code control; parish and municipal amendments can be stricter than the model code.
376 words, about 2 min02Plumbing Math, Pipe Sizing, and Fixture Unit Calculations
This domain tests basic arithmetic, unit conversion, fixture-unit totals, and the use of pipe-sizing tables. You must distinguish drainage fixture units (DFU) from water-supply fixture units (WSFU), use developed length, and convert pressure to head correctly.
312 words, about 2 min03Water Supply Systems: Materials, Installation, and Testing
This domain covers approved potable-water materials, joining methods, support and protection, pressure testing, and disinfection. The exam expects you to protect water quality from the meter to the fixture.
319 words, about 2 min04Drain, Waste, and Vent (DWV) Systems
This domain tests drain-waste-vent layout: traps, trap arms, vents, fittings, slope, cleanouts, and testing. The goal is a system that flows without siphoning trap seals or leaking sewer gas.
321 words, about 2 min05Fixtures, Fixture Fittings, and Appliances
This domain covers fixture selection, clearances, supports, traps, water efficiency, and appliance connections. The exam tests whether a fixture can be used, cleaned, and connected without cross-connection or structural problems.
278 words, about 1 min06Water Heaters and Fuel Gas Piping
This domain covers water-heater installation, temperature and pressure relief, venting, combustion air, thermal expansion, and fuel-gas piping. Safety devices and gas connections are heavily tested.
283 words, about 1 min07Sanitary Drainage, Storm Drainage, and Sewer Systems
This domain covers building drains, building sewers, sanitary drainage, storm drainage, sumps, cleanouts, and backwater protection. The exam tests slope, sizing, and separation of storm water from sanitary flow.
309 words, about 2 min08Backflow Prevention, Cross-Connection Control, and Potable Water Protection
This domain tests cross-connection control: how contamination enters potable water, which backflow device fits the hazard, and how devices are tested and maintained. Backsiphonage is caused by negative pressure; backpressure is caused by downstream pressure higher than supply pressure.
313 words, about 2 min09Safety, Tools, and Job-Site Practices
This domain tests job-site safety and tool use: excavation, confined spaces, hot work, electrical safety, ladders, PPE, and utility location. Call 811 before digging.
295 words, about 1 min