Drain traps, those curved pipes under the sink, prevent sewer gases from entering your home while allowing waste water to pass. They also catch items that may fall into the sink, like jewelry or other debris. Traps connect to surrounding pipes with screw-on joints, making them easy to remove when cleaning a clogged drain. When these joints come loose, though, it leads to under-sink leaks. Prevent trap leaks by keeping the area under the sink clutter-free. That means pulling trash cans, cleaners, or fire extinguishers away from trap so that your household essentials don't bump into the pipes.