Plumbers get more calls to open clogged drains than for any other service. Many
such calls could be prevented by greater care in the use of drains. The
most-used drain is the one in the kitchen sink and that is the drain most often

Preventing this situation can be done by carefully watching what
is emptied into the sink drain

Sink stoppages are usually caused by
liquid fats, emulsified by warm dishwater and carried through the pipes. The
water cools as it proceeds to the main sewer and leaves the fatty deposits along
the way. A film of grease forms on the pipe wall, then another and another.
Coffee grounds and bits of food add to this accumulation layer until the pipe
becomes impassible.

Pour excess grease into a tin can and throw it out
with the garbage, not down the sink drain. When using a food disposer, always
let sufficient cold water run to carry the particles down and into the main line
to prevent buildup in the smaller waste lines.

In the event of a
stoppage, you should have a “plumber’s friend,” or plunger — a large rubber
suction cup with a wooden handle. Cup it tightly over the drain and plunge it
vigorously several times. If it is a double drain sink, make sure you seal the
other drain, so water will not splash out into the other bowl or on you.