Pump “dimples” at max inflation

[Rider1400]

My uneducated guess is with others that you’re simply out of fluid. I have my post op coloplast sheet that shows size of cylinders size of reservoir and the amount of fluid he used. In my case he used the biggest reservoir because mine in just under the surface as I had double hernias with mesh. His idea was to use the larger reservoir so it.

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Hold flatten out more than the smaller one maxed out. He used the maximum amount suggested on the sheet.