Pool suction-drain injury, also known as suction entrapment, occurs when the drain of a wading pool, swimming pool, hot tub, or fountain sucks in a swimmer's jewelry, torso, limbs, hair or buttocks. In some cases of buttocks entrapment, victims are disemboweled. In the United States, 147 incidents were documented between 1985 and 2002 of which 36 were fatal.[1] In 1982, the Consumer Product Safety Commission reported that five children were disemboweled by drains in wading pools and urged pools to install covers on drains.[2][3]
A standard 8 inches (20 cm) main drain can develop up to 350 pounds (160 kg) of force, which could hold a person underwater in tight grip until the suction is released. This can drown the entrapped person, despite the rescue efforts of multiple adults.[4]
One way to make drains safer is to install shut-off valves and dome-shape drains that are less likely to create a suction effect with the human body, as required in the United States by the 2007 Virginia Graeme Baker Pool and Spa Safety Act.[5]