karebear to use the small tire inflater, you will need a screwin fitting available at any camping store. usually made of nylon, it has a standard hose screw-in fitting on one side and a bicycle threaded valve on the otherside. It is also made by CAMCO and is really a screw-in one way valve. when all faucets and drains are closed and the pump starts adding air to the system, you can then open the faucets one at a time untill only air comes out. I also open the drain valves one at a time untill all I get is air from anywhere. I usually go back around to each faucet or drain several times, but then I am retired and goofing around with my motorhome is really a hobby for me.