I looked on Google, and found this:
Easy fill - dual fill port. Pull both tabs and it's totally open so you can use any pump to fill really quickly. Insert the 1st tab and air flow is restricted so you can 'top it off' by blowing into the port. Insert the 2nd tab to close it completely.
Manufacturer's Customer Service Department at 1.855.903.8883
Hope this helps
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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