When it comes to household plumbing problems, one of the most troublesome issues you can run into is problems with your toilet. With so many different components both inside and outside the toilet tank, it's no surprise that these devices are vulnerable to issues. For example, if you've noticed that your incoming water supply line to your toilet tank is leaking, you'll need to repair it to prevent water damage and water waste. Here's a look at what you need to know.
Close The Water Valve
You'll need to shut off the water supply to the toilet before you can do any work to it. The toilet tank needs to be drained, and you cannot drain it as long as there's still water feeding into it. Locate the valve behind the toilet, typically near the floor, and turn it so that the water supply turns off. Most valves need to be turned clockwise to turn them off.
Drain The Water
The toilet tank stores water for when you flush the toilet. Before you can replace the supply line, you need to get rid of the water in the tank so it doesn't flush out the opening where the line connects.
Remove the lid from the tank so that you can clearly see the water level. Flush the toilet a few times, watching the water level each time. Continue flushing until the tank is completely empty.
Avoid Water Leaks
Place a bucket or container underneath the supply line inlet on the toilet tank. This will catch any residual water that flows out of the supply line or tank when you disconnect the line. The goal is to prevent any water from leaking onto the floor and potentially causing water damage around the toilet.
Disconnect The Old Line From The Tank
Unscrew the old supply line from the toilet tank. You may need a wrench for this if it's a nut that secures it, but most supply lines attach to the tank with a plastic fitting that you can unscrew with your hands. Remove the old line from the tank. Once any residual water has finished draining, move your bucket under the connection at the supply valve.
Disconnect The Old Line From The Valve
In most cases, the supply line attaches to the valve with a metal fixture. You'll want a wrench to remove this one. Turn the nut counterclockwise until it comes off the fitting. Remove the old line and place it in the drain bucket so that any remaining water can flow out.
Attach The New Line
Connect the new line to the water supply valve by screwing it into place. Tighten the metal fixture until it is as tight as you can get it by hand. Don't overtighten it so that you don't stress the fitting and cause it to leak.
Screw the plastic fitting onto the inlet on the toilet tank. Again, turn this until it is hand-tight, and then give it about an extra quarter turn if possible so that you know it is secure.
Restore The Water
Once both fittings are secure on your new supply line, open the water supply valve to restore the water flow to the tank. Watch both ends of the supply line to be sure that neither fitting is dripping or leaking.
Repairing a water supply line leak is as simple as following these steps to replace the line. If, however, you encounter any problems or this doesn't fix the issue, you should reach out to a toilet repair technician for more help.