Safety device for avoiding entrapment at a water reservoir drain having a secondary blowing pump

摘要

A safety device for avoiding entrapment at a water reservoir drain by using a vacuum operated switch to interrupt power to the reservoir pump and by using a pressure pump to generate a positive pressure to dislodge the obstruction from the drain should a blockage occur. In addition, a manual reset switch requires human intervention to re- activate the reservoir pump once the blockage condition is removed.