Building systems
Plumbing and fire protection
A practical introduction to fixture units, flow, pressure, drainage, and sprinkler coordination.
The original lesson follows Los Angeles plumbing requirements, fixture-unit calculations for water and waste systems, flow rate and gallons per minute, pressure loss through meters and check valves, and fire-sprinkler coordination. Pair the lesson with current local plan-check sheets and code editions.
Learning materials · Historical reference
Los Angeles plumbing plan check comments
Study the archived LARUCP Plumbing/Mechanical Plan Check List, revised November 2002. It illustrates the plan review and correction process under the codes referenced in that edition.
The preserved PDF has 10 pages while the original form indicates 12; completeness is not confirmed. Use it for historical training and check current requirements for permit work.