If the obstruction is in a fixture trap, usually the trap can be
removed and cleared. If the obstruction is elsewhere in the pipe other
means must be used.
Cleanout augers--long, flexible, steel cables commonly called
"snakes"--may be run down drainpipes to break up obstructions or to
hook onto and pull out objects. Augers are made in various lengths and
diameters and are available at hardware and plumbing-supply stores. (In
some cases, you may have to call a plumber, who will probably have a
power-driven auger.)
Small obstructions can sometimes be forced down or drawn up by use of
an ordinary rubber force cup (plunger or "plumber's friend").
Grease and soap clinging to a pipe can sometimes be removed by flushing
with hot water. Lye or lye mixed with a small amount of aluminum
shavings may also be used. When water is added to the mixture, the
violent gas-forming reaction and production of heat that takes place
loosens the grease and soap so that they can be flushed away. Use cold
water only. Chemical cleaners should not be used in pipes that are
completely stopped up, because they must be brought into direct contact
with the stoppage to be effective. Handle the material with extreme
care and follow directions on the container. If lye spills on the hands
or clothing, wash with cold water immediately. If any gets into the
eyes, flush with cold water and call a doctor.
Sand, dirt, or clothing lint sometimes clogs floor drains. Remove the
strainer and ladle out as much of the sediment as possible. You may
have to carefully chip away the concrete around the strainer to free
it. Flush the drain with clean water.
When drains have become partially clogged due to lack of water to
transport all solids through them, large buckets or other containers
should be used to flush them. Water should be poured fast enough to
nearly fill the drain.
Occasional flushing of floor drains may prevent clogging.
=CAUTION: Augers, rubber force cups, and other tools used in direct
contact with sewage are subject to contamination. Do not later use them
for work on your potable water supply system unless they have been
properly sterilized.=