Not trying to hi jack this or anything but after my 75 year old boss man saw my Discovery he got him one ordered but he wants me to go get him a scuba tank but what do I need as a regulator for it. I use a hand pump since I am still in my young 40s lol. But he can't pump them up so I am unsure what to get. All I know is that on the Discovery its a male K valve. You can just point me in the right direction with a link if you want to and I appreciate it.