Installing a toilet flange extender is a relatively simple project that can help raise a toilet flange to the proper height when replacing a toilet or installing new flooring. With a few basic tools and supplies, you can complete this project in about an hour.
What is a Toilet Flange Extender?
A toilet flange extender is a cylindrical plastic or metal ring that fits on top of an existing toilet flange to raise it up. Toilet flanges are mounted to the floor around the toilet drain pipe. When new flooring is installed, it can leave the old flange too low to make a good seal with the toilet. A toilet flange extender solves this problem by providing extra height.
When Do You Need a Toilet Flange Extender?
There are a few situations when a toilet flange extender is required:
- Installing new flooring: If you are replacing the flooring around the toilet, the new floor will likely raise the level of the floor surface. This can leave the old toilet flange too low relative to the new floor, so an extender is needed.
- Replacing an old, corroded flange: Over time, a cast iron or metal toilet flange can become corroded and worn out. Replacing it with a new flange and extender allows you to raise it up to the proper height.
- Converting from a 3-inch to 4-inch drain pipe: If you are updating your drain pipes, going from a 3-inch to a wider 4-inch pipe requires replacing the toilet flange and adding an extender.
How to Install a Toilet Flange Extender
Installing a toilet flange extender is a straightforward DIY project. Follow these steps:
Materials and Tools Needed
- Toilet flange extender that fits your flange size
- Wax ring for creating a seal
- Four 1/4″ bolts with washers and nuts
- Caulk and caulking gun
- Adjustable wrench
- Tape measure
- Utility knife
- Screwdriver
- Protective gear like gloves and eye protection
Step 1: Turn Off Water Supply and Remove Toilet
Start by shutting off the water supply valve behind the toilet. Flush to empty the tank and use a sponge to remove any remaining water. Disconnect the water line from the toilet valve and unbolt the toilet from the flange. Carefully lift the toilet and set it aside on cardboard or a tarp.
Step 2: Remove Old Flange
Use a utility knife to scrape away any old wax, putty, or caulk from around the flange edges. Then unscrew the flange bolts and detach the old flange. You may need to cut it with a reciprocating saw if it does not detach easily.
Step 3: Install the Extender and New Flange
Place the new extender ring over the old flange mounting holes. It should raise the flange surface about 1/4″ to 1/2″ higher than the floor level. Put the new replacement flange on top centered over the extender. Insert the flange bolts through the extender and flange into the floor to secure both parts tightly.
Step 4: Install the Wax Ring
Pack plumber’s putty around the gap between the extender and the floor. This seals any small openings. Then turn the wax ring upside down and place it on top of the flange. The tapered end should face the drain hole.
Step 5: Re-Install the Toilet
Carefully set the toilet back over the flange extender. Push straight down to create a good seal with the wax ring. Install washers and nuts on the flange bolts and tighten evenly until snug. Don’t overtighten or you may crack the porcelain. Reconnect the water line and turn on the water supply.
Step 6: Caulk Around the Base
Apply a bead of tub and tile caulk around the entire toilet base where it meets the floor. This creates a nice finished look and helps prevent leaks. Allow the caulk to fully cure for 24-48 hours before using the toilet.
Tips for Getting a Good Seal
- Make sure the flange extender raises the new flange up high enough to meet the toilet horn.
- The toilet should sit flat and stable on the floor without rocking. Adjust the height with additional flange extenders if needed.
- Put weight on the toilet when tightening the flange bolts to compress the wax ring.
- Use premium quality bolts and wax ring for a leak-proof seal. Avoid cheap flimsy hardware.
- Take your time and don’t rush the installation steps. Getting a good seal is all about precise installation.
FAQs About Toilet Flange Extenders
How much does it cost to install a toilet flange extender?
The parts cost $15 to $30 on average. Hiring a plumber typically costs $150 to $250 for this 1-hour job. Doing it yourself saves about $100 to $200.
What if my flange is below the floor level?
Use an extra-thick extender ring or stack two extenders to build it up above floor level as needed. Grinding down some flooring may also be required in severe cases.
How do I know if my wax ring seal is good?
Check for wobbling at the base of the toilet. Also look for water leaking onto the floor around the sides. If either occur, the wax seal is likely faulty.
Can I use a toilet flange extender with a metal flange?
Yes, extenders work for either plastic or metal/cast iron flanges. Just be sure to match the size and bolt layout.
Should I replace my toilet flange when installing new flooring?
If the old flange is in good shape, you can use an extender to save it. But replacing the flange ensures a smooth installation and prevents future leaks.
Conclusion
Installing a toilet flange extender is an easy, cost-effective way to raise up an existing toilet flange so it works with new flooring or a replaced toilet. With some basic tools and supplies, you can complete this fix in an hour or so, saving on the cost of a plumber. Pay close attention to getting a quality seal with the wax ring and flange bolts. Taking your time will lead to a successful project free of leaks or headaches down the road.
