Water back-up is one of the more confusing coverages in homeowners' policy. It involves more than back-up, as overflow is mentioned in some of the coverages. But what is a back-up, and how is it different from an overflow or a discharge? All these things come in to play when there is a water loss, and what causes the back-up or overflow may make a difference in whether or not there is coverage.
First let's look at definitions. A back-up is an accumulation caused by a stoppage in the flow; something prevents the water from continuing down its path, so it is forced to reverse direction and go back the other way. A collapsed drain pipe can cause a back-up; water can no longer proceed down its normal course and is forced to change direction. A blockage can cause a back-up; the blockage prevents the water from going forward, and the water has to reverse itself.
An overflow is when the water exceeds its boundaries; the space is filled to capacity and water then spreads beyond its limits. A tub left running creates an overflow. The tub can no longer hold the water running into it, so the water overflows onto the floor and surrounding area.
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Christine G. Barlow, CPCU
Christine G. Barlow, CPCU, is Executive Editor of FC&S Expert Coverage Interpretation, a division of National Underwriter Company and ALM. Christine has over thirty years’ experience in the insurance industry, beginning as a claims adjuster then working as an underwriter and underwriting supervisor handling personal lines. Christine regularly presents and moderates webinars on a variety of topics and is an experienced presenter.
