There are numerous symptoms that could point to a clogged drain in your home. If the water in your tub or sink drains slowly, you may have clogged pipes or drains. If flushing your toilet causes water to back up in your tubs or sinks, you may have a blockage that is preventing sewer water from leaving your home. You may also notice gurgling sounds or foul odours coming from your pipes. These are all symptoms of clogged drains.