Originally Posted by willk
hmmmm, high pressure tubes maybe?
.. just kiddin
As an aside - why couldn't normal fuel ( petrol etc ) be carried inside the tubes ? The flexible tanks AVON sell are hypalon I think ? Just stick one insude each side with its own connector ? Its protected from damage by the 'standard' part of the tube, deosnt affect bouyancy if its fitted right & uses all that 'free' space we drag around with us - oh its lighter than water to (just not as light as air !) so still helps us float - ( ok that bit is a bit open to question)