The document lists 9 signs that indicate a homeowner needs to call a plumber. These signs include slow or non-draining sinks and bathtubs, water appearing in unexpected places, low water pressure, faucets or showers that won't stop dripping, plugged toilets that can't be unclogged, overflowing or constantly flushing toilets, foul smells from drains, presence of mold, and sudden increases in water bills. The document recommends calling a plumber like A Better Plumber as soon as any of these issues are noticed, as plumbing problems can worsen over time and cause health and property damage.