Clean, efficient and got job done in a timely manner. And find out why we are considered the “plumber referred by your friends”. To fill the tank, remove the aerator from the nearest faucet and open the hot side slowly turn on the water supply and check connections along the water heater for leaks if you are leak-free, fill the tank if you have leaks, shut off the water supply and gently tighten the connections repeat until the connections are.