Repairs, replaces, or installs plumbing systems and components (water, sewer, and drain lines, valves, faucets, etc.) by using appropriate materials and tools (various types of piping, fittings, valves, tanks, pipe wrenches, cutters, adhesives, etc.). Qualifications: Requires 3+ years as a "Facilities Maintenance Worker" and has possession of journey-level certification in areas of commercial or institutional experience for one or more primary fields such as electrical, electronics, mechanical, plumbing, HVAC, carpentry, or vacuum systems.