The most commonly charged back repairs are those repairs related to plumbing systems; specifically toilets, drains, and in sink disposals.  You should never flush anything down a toilet other than what is obvious and toilet paper.  Never flush feminine products, paper towels, condoms, cigarette butts or similar items down the toilet.  These products can cause toilet malfunctions, and in severe instances, actually block the sewer line of a property, which is a maintenance emergency.  A common misconception about in sink disposals is that they are “in sink trash cans.” They are not; they are intended for the small amount of soft food left on your plate. The disposal chops up those soft food particles so they don’t plug up the drain.  Too much food in the disposal will cause a problem.  They are also not for aquarium rocks, bottle caps, cigarette butts or paper products (this may seem obvious but it happens a lot).