Plumbing a toilet with PEX is a job that’s easier than it looks, even if you’re a novice DIYer. PEX (cross-linked polyethylene) is a flexible, lightweight plastic tubing that’s become increasingly popular for plumbing in recent years. It’s resistant to corrosion, scale, and chemicals, and it can be used for both hot and cold water lines.
Key Takeaways
For those in a rush, here are the basics of plumbing a toilet with PEX:
- Turn off the water supply and flush the toilet to empty the tank.
- Disconnect the old supply line and remove the toilet.
- Install the new PEX supply line and connect it to the toilet.
- Install the toilet and reconnect the PEX supply line to the water supply.
- Check for leaks and make any necessary adjustments.
Planning Your PEX Toilet Plumbing
Before you get started, it’s important to plan your work. Determine the length and type of PEX pipe you need, and gather all the necessary tools and supplies:
- Pliers for cutting and crimping
- Crimp tool
- Measuring tape
- Level
- Tubing cutter
- Teflon tape
- PEX inserts
- PEX cinch rings
Installation Instructions
- Turn off the water supply to the toilet and flush the toilet to empty the tank.
- Disconnect the old supply line. Use pliers to loosen the nuts connecting the supply line to the toilet and the water supply valve.
- Remove the toilet. First, loosen the floor bolts that hold the toilet in place. Then, gently lift the toilet up and away from the floor.
- Install the new PEX supply line. Cut the PEX pipe to the desired length and insert a PEX insert into each end. Crimp the inserts into place using the crimp tool.
- Connect the PEX supply line to the toilet. Thread the PEX pipe onto the toilet’s fill valve, then tighten the connection using a wrench.
- Install the toilet. Carefully place the toilet back onto the floor, making sure to align the bolts with the holes in the toilet base. Tighten the bolts until the toilet is secure.
- Reconnect the PEX supply line to the water supply. Thread the PEX pipe onto the water supply valve, then tighten the connection using a wrench.
- Check for leaks. Turn on the water supply and check for leaks at all connections. Tighten any loose connections as necessary.
Troubleshooting Tips
- If the toilet is leaking from the base, check to make sure the wax ring is properly seated. If the leak persists, you may need to replace the wax ring.
- If the toilet is running constantly, check to make sure the fill valve is adjusted properly. The water level in the tank should be about 1 inch below the top of the overflow tube.
- If the toilet is making a whistling sound, check to make sure the fill valve is not clogged. If the clog is severe, you may need to replace the fill valve.
FAQs
Q: Can I use PEX tubing for both hot and cold water lines?
A: Yes, PEX tubing can be used for both hot and cold water lines. However, it’s important to use PEX tubing that is specifically designed for hot water applications.
Q: What size PEX tubing should I use for a toilet?
A: For most toilets, you will need to use 1/2-inch PEX tubing.
Q: How do I cut PEX tubing?
A: PEX tubing can be cut using a tubing cutter or a hacksaw. Be sure to make a clean, square cut.
Conclusion
Plumbing a toilet with PEX is a straightforward and affordable project that can be completed in a few hours. By following these instructions, you can save yourself the cost of a plumber and have the satisfaction of knowing that you’ve done the job yourself.
