Levels of pH also accounted for numerous pool closures. This points up the fact that regular chemical maintenance is critical in ensuring that chemical levels are in the acceptable ranges. Keep in mind that heavy bather load, hot days, body oils, lotions, and neglected pools can lead to significant chemical imbalance. All pool operators must be aware of the potential hazard of hair or body entrapment caused by drain covers in spas and pools. Hair entrapment is possible particularly from suction fittings located on the sides of pool walls.
Most individuals can usually feel suction near their arms, legs, hips, etc.
However, hair tends to flow more easily through a vortex created by an open drain or suction fitting without warning. The CPSC states that, The suction from drain outlets is strong enough to cause entrapment of hair or body parts and drowning. Most accidents with drains or return inlets involve people with hair that is shoulder-length or longer. Hair entrapment occurs when a bather's hair becomes entangled in a suction fitting drain cover as the water and hair are drawn powerfully through the drain. In several incidences, children were playing a 'hold your breath the longest' game, leaning forward in the water and permitting their long hair to be sucked into the drain.