BCA 0450 - Plumbing I BCA 0450 - Plumbing I 80-160 con. hrs. -160 Occupational -5.3 The course is available on a limited basis if you are not participating in an indentured apprenticeship. Major areas of study include basic plumbing tools and practices, plumbing mathematics, related sciences, installation practices, first aid, occupational safety and health, and blueprint reading. Course Designations: (CH)