Photo: Stephan Goelnitz
Many pumps can also extract air (connection to "deflate" or "DEF"). This allows the board to be deflated like fish in a vacuum machine.
Deflating with a pump protects the board on rough surfaces because you no longer have to press when rolling. It reduces the pack size and you can also roll up the board from the valve.
The aim when rolling and folding should always be to avoid a kinked edge directly on the fin box.
At this point, the angular plastic collar may otherwise push through the covering PVC patch. This has been seen more often and requires a more complex repair.
You can find more information in SUP 1/2019 in the Test on electric pumps ->
