Quick Set pool has a hole in the air ring. How to identify the source of the leak.

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The top ring of my Quick Set™ pool has a hole, but I can't find the source. Any suggestions?

Try using a solution of soapy water. Inflate the top ring and sponge soapy water over it. Where the air escapes, bubbles should form. Wash away the soap, dry the area, and use a repair patch on the hole.