The purchase was recorded in a notebook by the leaders, which made it official.
Then we went to another group, where we waited for Michael's name to be written on the list instead of the previous owner's name. For a while we weren't sure what was taking so long, so Michael went over to one of the men to ask. They were waiting for a girl who went to buy wite-out so they could cover the previous name in the notebook and write Michael's name instead.
Michael also had to sign up for the community work list since we now own a water connection. We have yet to see how often they ask him to work, but we will be able to pay someone to work for him since his back hurts.
A couple of weeks later, we went to literally transfer the faucet from the other owner. First we went to his land, where some men dug around the pipes and cut them to remove his pipes and patch the hole. Then we walked over to our land, carrying the faucet. They cut the pipes which ran across one edge of our land and inserted a new pipe with the faucet. You can see the post (cut from a small tree nearby) to which they tied the pipe to help it stay upright.
After all that, we now have water!