A toilet is the most overlooked fixture in the house . But they can cost you big time from just the wax seal being improperly installed.Is your toilet working correctly? a flapper can ruin your drainfield or if your on a city sewer, it can be lots of wasted water paid for and not used. That can be a frustrating situation. Every three to five years toilets should be serviced. The water we drink to keep drinking water safe there is chlorine and other stuff that keeps the water safe but it will break down the plastics and other parts on the inside of a toilet very quickly.