The potential eligibles are then rated against the remainder of the Job Elements: Equipment Assembly, Installation, Repair Interpret Instructions, Specifications (includes blueprint reading) Technical Practices Use and Maintain Tools and Equipment Without more than normal supervision Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religions; spiritual; community; student; social). The Pipefitter performs duties at the journeyman level that include the design, inspection, installation, modification, repair, and maintenance of all high purity medical gas systems, compressed air systems, natural gas systems, pressure steam systems, heating systems, drain waste and domestic water systems.