Is it the manual pump or electric, my electric pump had an assortment of valve sizes to fit pretty much anything and it could be switched to inflate or deflate, as far as I remember it was the same inlet/outlet on the Kampa but if your using a manual pump you probably won’t have the option, even though I could use deflate I never found the need, undo the valve and by the time I’d folded it most of the air was gone, Kampa also came with an oversize bag to pack it in so even with some air left in it the bag was plenty big enough which I thought was a great idea of Kampa, lots of things that come in a bag are never big enough to put it back in.