In all our fenders and buoys we use an unique strong brass valve for easy inflation and deflation. The best way to inflate a fender is just pushing air pressure from a compressor (without a needle) against the valve and the fender will inflate. Also it is possible to inflate the fender with a bicyle pump with a special adaptor, which should be available at dealers with our products. Please don’t use a handset with a pin to inflate, because the pin can damage the valve.
The best inflation pressure is 0,2 bar. This is the pressure where you should be able to press the body of the fender visible easy with your flat hand. For deflating just push a pen slightly in the valve to let the air out. If you push to hard and to deep, the valve will be damaged.
Is a valve is leaking you can replace it with turning in a bolt M3 (or a woodscrew). You turn the bolt or woodscrew into the valve and pull the valve out with a pair of tongs. After inspecting you can push a new valve or the same inspected or cleaned valve back in the tube with a pen.