Step 8 · Turn Water On and Check for Leaks
This is the moment of truth. Go back to the main water shutoff valve and turn it on slowly, opening it counter-clockwise all the way. Listen for any sounds of rushing water. Return to the sink and use a flashlight to meticulously inspect the new angle stop. Look for any signs of moisture or drips at both connections: where the valve meets the wall pipe and where the supply line connects to the valve. Use a dry paper towel to wipe down all connections, as this will make even the tiniest leak visible. If everything is dry, slowly turn the handle on the new angle stop a quarter-turn to the 'on' position (handle will be parallel to the outlet). Water should now be flowing to the faucet. Check the faucet for normal operation and perform one final leak check on all connections.