Water levelers are designed to maintain the water level in the pool. The water level is important to prevent the main circulation pump from running dry. In the event that a pump is running dry, the system will create air friction within the pump body. The heat created can damage pump internal parts and can eventually cause the motor to seize. This is also a safety feature. If the pool was to be drained or partially drained due to evaporation and someone fell into the water, the depth has now been adjusted preventing the person from possible further injury due to shallow water.
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