The problem you most often run into with your plumbing undoubtedly involves the drains under your sinks or your toilets. They can clog, slow down and get completely stopped up. Your first reaction is to take the plunge— get out the plunger (aka: the “plumbers friend”). A plunger often can clear out your drains, especially if you use it properly.

How? For sinks, first be sure that the suction cup is big enough to completely cover the drain opening. Stuff wet rags into any overflow openings in the sink and in the drain of any other sink that may be attached to the same drain piping. Fill the stopped-up sink with enough water to cover the plunger cup.

Next, for sinks and toilets, coat the rim of the plunger with some petroleum jelly to make a tight seal and try a dozen or so strokes of the plunger; try this several times. You also may want to try using a drain auger (or plumbers’ “snake”) to dislodge the clog.

If all this doesn’t open up your drain, your trap may have to be removed to clean it out or even further work may necessary. Be wary of chemical drain cleaners because they can burn skin and damage metal pipes. It probably is time for you to call your licensed professional plumber.