Step 6 · Re-pressurize and Check for Leaks
Double-check that the tank connection is tight and that the hose-bib drain valve on the tank tee is fully closed. Also ensure any faucets you opened to drain the system are now closed. Go to the main water shut-off valve and open it SLOWLY. You will hear water begin to fill the new tank and the pipes. As the system fills, meticulously inspect the new connection point between the tank and the tee for any signs of water. Use a dry paper towel or your hand to feel for moisture. If you detect a leak, shut the water off and tighten the connection slightly (1/4 turn) and test again.