Regular sump pumps: silent killers.
They lurk in the basements of unsuspecting homeowners, burrowed in the foundation, feeding on excess groundwater that could suddenly flood your house.
They're silent beasts (you might not even know you have one), except when they produce a varied assortment of growls and thumps.
They're also unpredictable, waiting months or years to strike. They can't be reasoned with.
They can cause an average of $30,000 of damage.