I noticed my upstairs toilet tank was leaking and water damage had started on the baseboard trim and garage ceiling due to the leak. I went to my local hardware store to pick up a universal toilet repair kit to fix the leak.
Universal toilet repair kit
½ inch deep socket
Step 1: Shut Off Water
Shut off water supply line valve.
Step 2: Preparation
Remove toilet tank lid. Flush toilet and soak of water with sponge, drain into bucket.
Step 3: Disconnect Water Supply Line
Unscrew locknut toilet flush valve from water supply line.
Step 4: Unscrew Old Flush Valve From Toilet Tank
With a adjustable pliers unscrew old flush valve from toilet tank.
Step 5: Remove Old Flush Valve
Lift out old flush valve.
Step 6: Remove Toilet Tank
Remove toilet tank from toilet bowl. Unscrew bolts with ½ inch deep socket wrench on bottom of toilet tank. Unthread rubber and metal washers.
Step 7: Remove Old Rubber Gasket
Place toilet tank on old towel. Remove old rubber gasket from bottom of toilet tank.
Step 8: Remove Old Hardware From Toilet Tank
Step 9: Install New Rubber Gasket and Hardware
Install new rubber gasket and new hardware to toilet tank. On inside of tank thread rubber washer through bolt, than secure on outside with metal washer than secure with bolts with a ½ wrench.
Step 10: Reseat Toilet Tank to Toilet Bowl
Fasten toilet tank to toilet bowl. Thread rubber washer, than metal washer, secure with bolts with ½ inch deep socket wrench on each of the toilet.
Step 11: Level Toilet Tank
Place level over toilet tank to check that tank is level.
Step 12: Adjust New Flush Valve
Prior to placing new flush valve in toilet bowl adjust to appropriate water level height.
Step 13: Fasten New Flush Valve to Toilet Tank
Secure new flush valve to toilet tank with plastic nut with adjustable pliers.
Step 14: Fasten Water Supply Line to Toilet Tank
Secure water supply line to flush valve with locknut to toilet tank by hand.
Step 15: Cut Refill Tube to Appropriate Length
With a scissors, cut refill tube to length. Attach refill clip to tube than to overflow pipe.
Step 16: Turn on Water Supply Valve
Turn back on water supply valve and check for leaks. No leaks, your job is done.