Education: Secondary (high) school graduation certificate. Tasks: Install domestic, commercial or industrial plumbing fixtures and systems. Read blueprints, drawings and specifications to determine layout of plumbing system, water supply network and waste and drainage systems. Locate and mark positions for pipe connections, passage holes and fixtures in walls and floors. Cut opening in walls and floors to accommodate pipe and pipe fittings. Test pipes for leaks using air and water pressure gauges. Estimate costs and materials. Measure, cut, thread and bend pipes to required shape and size. Screening questions: Do you have experience working in this field?. Experience: 2 years to less than 3 years.