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Plumbing - Is it Really That Complicated?

Most people think that the plumbingfresh air prevents suction that would
system in a home is more complicatedstop the free flow of drain water.
than it really is because of it'sAll sewage will eventually reach the
network of pipes and valves. Once youwaste and vent stack. The waste water
recognize the major components and theflows in the sewer line and exits the
roles they play, home repairs arehouse via a municipal sewage system or a
relatively easy to do.private septic tank. In the meantime,
Most home plumbing systems are composedsewer gas rises through the vent and
of three things: the water supplyescapes through the roof vent, thus
system, the fixtures and appliances, andrendering it harmless.
the drainage system. Water enter a homeMost of the pipes in modern homes are
through a main supply line, either amade of copper but plastic is becoming
municipal water company or a privatemore popular. Homes build before the
well. If it comes from a municipal1950's usually had pipes that were made
source, it must first pass through aof galvanized iron. Iron pipes can lead
meter which measures the amount of waterto water that looks rusty when it first
used.comes through the fixtures.
Once the water from the main supplyMost pipes in the drainage waste system
enters the house, the branch line splitsis made of plastic or cast iron. They
off and joins the water heater. Fromcan be one and a quarter inches to four
there, the hot and cold water lines runinches in diameter to allow easy passage
parallel to each other to all theof waste water through the pipes. Lead
fixtures and appliances in the house.pipes are no longer used in home
Once the water becomes waste, it runsplumbing, though for the waste drainage
into a trap and then into the drainsystem they do not pose a health hazard.
system which works totally by gravity.Slope is an important factor in the
Waste water flows downhill through awaste drainage system, and each section
series of large diameter drain pipes,must have the proper degree of slope to
which are attached to a system of ventallow the system to function as
pipes. Vent pipes permit air to enterintended, working with gravity to remove
the system through a roof vent. Thisthe wastes.



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