Installs, replaces, modifies, inspects, and repairs water system piping, devices, supports, etc., plumbing equipment and devices, low pressure natural gas piping and piping devices, swimming pool water circulation, filtration and piping systems and associated component and devices, water solenoid and thermostatic mixing valves.Installs, replaces, repairs, modifies, inspects and clears storm, sanitary and clearwater sewer piping and fixtures. Operates pneumatic hammering equipment, cleans and services; sanitary and storm drains, kitchen grease traps, catch and sump basins, etc.