Replacing a toilet's water supply line is quick, easy, and can help save water
Want to replace your old angle stop while you're at it? Watch this!
If you find your toilet's old supply line leaking, then it is time to replace it! We will help you through removing and installing a flexible toilet supply line here.
- Towels or rags
- Wrench or pliers
- New flexible stainless steel supply line
The most common toilet supply line is a stainless steel flex supply line, shown above. Most houses, condos, or apartments will have this type of supply line since they install so quickly and easily. There are many other types of supply lines that require a more in depth removal and install, such as a rigid supply line. However, since those are not too common and are often specific to the toilet they are installed on, we are just going to discuss the most common stainless steel flex line.
straight stop valve
Turn the water supply to the toilet off by turning the knob on your straight or angle supply valve. Typically, the knob will turn clockwise to turn the water off and counterclockwise to turn it back on.
Flush the toilet a few times to empty the water from the tank. Use a towel to soak up the rest of the water inside the tank so that it does not leak onto the floor when the supply line is removed.
Use a wrench to loosen the supply line nut connecting to the supply valve. Then do the same to the nut connecting to the toilet's fill valve. That connection will be on the underside of the tank and you may need another towel handy as some water may still drip out of the old supply line.
Install the new supply line by hand tightening the white plastic nut to the toilet's fill valve nipple on the under side of the tank. Then hand tighten the metal nut to the supply valve.
Turn the water back on by turning the knob on the supply valve.
Check for leaks. If the plastic nut connection end is leaking, slightly hand tighten the plastic nut until the leak ceases. Do not use a wrench on plastic nuts. If the metal nut connection is leaking, use a wrench or pliers to tighten the metal nut just a quarter of a turn past hand tightened to ensure the connection is sealed. Please Note: Do not tighten metal nuts more than a quarter of a turn past hand tight.
If you do not already have a supply line to install and/or are not sure what size to get you can simply measure the length of your existing one. We offer 12" and 20" supply lines. The more commonly used length is the 12" as most toilets are fairly close to the supply valve.
Learn how to replace your toilet stop valve quickly and easily in this video tutorial