There are some serious safety hazards on the swimming pool main drain. The risks extend far beyond drowning, with the most critical danger being the potential for entrapment injuries caused by the immense suction force generated during operation.
The core risk: Powerful adsorption capacity.
Because the drain at the bottom of the pool is connected to the water circulation system and generates immense suction during drainage.It said that the suction force at the drain can reach up to 23 kilograms per square centimeter. Experts have likened this force to being strong enough to hold fast an ox weighing approximately 800 kilograms.
Even worse ,once a body part is trapped and negative pressure forms, it is nearly impossible to break free using one's own strength. There have been documented cases where the combined efforts of multiple adults pulling together failed to rescue a trapped child.
In addition, other types of injuries can occur.
Limb entrapment: Most commonly, hands, feet, or thighs are sucked into the drain.
Hair entanglement: Long hair poses a very high risk; it can easily be drawn into and tangled in the drain, pulling the person underwater.
Snagging of clothing or accessories: Swimwear or jewelry can also be sucked into or caught on the drain.
Therefore, we must pay necessary attention to The suction Entrapment Hazard of main drain .