Measuring Toilet Outlet Size - The Key To Choosing The Best Wax Ring
Installing a new toilet or replacing an old one often requires getting a new wax ring seal. This critical part creates a water-tight connection between the toilet and the floor flange, preventing leaks and damage. However, getting the wrong size wax ring can result in leaks and the need for another replacement down the road.
That's why the very first step in choosing the right wax ring is accurately measuring the toilet's outlet size. Read on to learn why proper measuring is so important and how to ensure you get the perfect fit.
When Do You Need a New Toilet Wax Ring?
There are three common scenarios that require replacing the old wax ring with a new one:
- Installing a new toilet
- Removing an existing toilet for renovations and then re-installing it
- Noticing water pooling around the base of the toilet, indicating leaks and seal failure
In each case, simply getting a new toilet wax ring of the proper size is essential to creating a tight connection to the drainpipe and avoiding any leaks or water damage.
Types of Toilet Wax Rings
Before choosing the right wax ring, it helps to understand the different options available:
- Regular vs. Extra-Thick - The thickness depends on the toilet flange height. Regular rings work for flanges at floor level. Extra-thick rings are needed for recessed flanges.
- Standard vs. Jumbo Size - Jumbo rings have a larger diameter to fit giant and elongated toilet outlets.
- Wax vs. Wax-Free - Wax-free foam rings are an alternative that doesn't melt from heat.
- Flange Extenders - Spacers used to raise a low-lying flange up to the floor level.
How to Measure Toilet Outlet Size
The most important measurement is the outside diameter of the toilet's outlet, also known as the "elbow neck." This allows you to match the wax ring size to your specific toilet.
Use a soft measuring tape to gauge the outlet size across the outer edges. The two most common sizes are:
- 3 inches
- 4 inches
For accuracy, refer to the specifications in your toilet's manual or on the manufacturer website. Take the measurement in multiple spots and use the largest one.
Factors That Determine Wax Ring Size
While the outlet diameter is the primary factor, there are a few other considerations that can impact the proper wax ring size:
- Toilet Design - A two-piece toilet may need a different ring size than a one-piece design.
- Flange Height - The thickness required depends on if the flange is at floor level or recessed.
- Flange Extender - An extender ring must be matched to the flange depth.
- Toilet Type - Low-flow and standard flush toilets need rings suited for their outlet shape.
Referencing your toilet model information and taking accurate outlet measurements are the best ways to factor in design, flange, and toilet variations.
Choosing Between Regular or Thick Wax Ring
Once you've measured, how do you decide between a regular ring and an extra-thick ring?
Use a regular wax ring if:
- The floor flange is level with the floor surface.
- There are no gaps between the flange and floor.
- You have a standard floor and plastic/PVC flange.
Choose an extra-thick wax ring if:
- The flange is below floor level, even slightly.
- There are gaps between the flange edges and floor surface.
- You have uneven tile or stone flooring.
Extra-thick rings compensate for low or uneven flanges and create a tight seal.
Shopping for the Right Wax Ring
Armed with your toilet outlet measurements, you're ready to shop for the perfect wax ring:
- Bring your measurement when going to the hardware store.
- Reference toilet specs to ensure compatibility.
- Select regular or thick based on flange height.
- Consider getting alternate sizes as backup.
It's smart to test fit the wax ring on your toilet at home before permanently installing it. This allows you to verify the fit and switch sizes if needed.
Installing New Toilet Wax Ring
Once you've verified the right wax ring size, install it properly:
- Remove old toilet and completely clean away old wax.
- Set bowl and test fit new ring on outlet to confirm seal.
- Apply even pressure when bolting toilet to flange.
- Do a final leak check after installing.
Taking your time and using proper techniques will ensure a watertight wax ring seal.
Troubleshooting Improper Wax Ring Fit
If you end up with leaks around the base of the toilet, the wax ring size is likely incorrect:
- Visible water pooling means the seal is not tight.
- Remove toilet and replace ill-fitting ring.
- Add flange extender if flange is very low.
- Switch to thicker wax ring if needed.
Catching leaks early and re-installing with the right ring size can prevent extensive water damage and complications down the road.
Getting the toilet wax ring size right is crucial for creating a watertight seal and preventing leaks. Accurately measuring the toilet outlet diameter and factoring in flange height are key steps.
A properly sized and installed wax ring should last for years without issues. Taking extra time to measure precisely and test fit will ensure you choose the optimal wax ring on the very first try.