23800 PLUMBER, MAINTENANCE
Assembles, installs and repairs pipes, fittings and fixtures of heating,
water, and drainage systems, according to specifications and plumbing
codes. Studies building plans and working drawings to determine work aids
required and sequence of installations. Inspects structure to ascertain
obstructions to be avoided to prevent weakening of structure resulting
from installation of pipe. Locates and marks position of pipe and pipe
connections and passage holes for pipes in walls and floors, using ruler,
spirit level and plumb bob. Cuts openings in walls and floors to
accommodate pipe and pipe fittings, using hand tools and power tools. Cuts
and threads pipe, using pipe cutters, cutting torch, and pipe-threading
machine. Bends pipe to required angle by use of pipe-bending machine or by
placing pipe over block and bending it by hand. Assembles and installs
valves, pipe fittings, and pipes composed of metals, such as iron, steel,
brass and lead, and nonmetals, such as glass, vitrified clay, and plastic,
using hand tools and power tools. Joins pipe by use of screws, bolts,
fittings, solder, plastic solvent, and calks joints. Fills pipe system
with water or air and reads pressure gauges to determine whether system is
leaking. Installs and repairs plumbing fixtures, such as sinks, commodes,
bathtubs, water heaters, hot water tanks, garbage disposal units,
dishwashers, and water softeners. Repairs and maintains plumbing by
replacing washers in leaky faucets, mending burst pipes, and opening
clogged drains. May weld holding fixtures to steel structural members.
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