Nevada requires Plumbing contractors to have a license regardless of the contract. There is licensing for pipelines and conduits and water. (A-19a) The Nevada Plumbing Contractor C-1D licensed allows the creation and maintenance of permanent water systems. Licensing for sewers drains, and pipes (A-15) is for various pips and septic tanks. Water heater installations require a (C-1H) plumbing license.