how to install closet flange spacer

Daniel Parker

2 min read

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07-02-2025

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Closet flange spacers are essential for ensuring your toilet sits at the correct height and seals properly. This guide provides a comprehensive walkthrough of how to install one, ensuring a successful and leak-free toilet installation.

Understanding Closet Flange Spacers

A closet flange is the metal ring embedded in your floor that your toilet bolts to. Sometimes, the flange sits too low, making it difficult or impossible to install a toilet correctly. This is where a closet flange spacer comes in. These spacers raise the flange to the proper height, providing a level surface for your toilet.

Tools and Materials You'll Need

Before you begin, gather these essential tools and materials:

• Closet flange spacer: Choose a spacer appropriate for the height adjustment needed. They are typically made of plastic or metal.
• Toilet: Ensure you have the toilet ready for installation.
• Drill: A cordless drill with various sized drill bits is helpful for some spacer types.
• Screwdriver: A Phillips head screwdriver is generally needed to secure some spacer types.
• Measuring tape: Accurate measurements are crucial for proper installation.
• Level: Ensuring a level installation prevents leaks and ensures a stable toilet.
• Caulk: Silicone caulk is essential for sealing the connection between the flange and the spacer.
• Wrench: You may need a wrench to tighten bolts depending on the spacer type.
• Safety Glasses: Protect your eyes from debris.

Step-by-Step Installation Guide

Step 1: Preparation

First, carefully remove any existing toilet. Clean the area around the existing closet flange thoroughly. Remove any old caulk or debris that could interfere with installation.

Step 2: Measuring and Selecting the Right Spacer

Measure the distance between the top of the flange and the finished floor. This will determine the height of the spacer you need. Select a spacer that provides the necessary lift.

Step 3: Installing the Closet Flange Spacer

The installation method varies slightly depending on the type of spacer.

• Screw-on Spacers: These spacers typically screw directly onto the existing flange. Carefully align the spacer and screw it onto the flange using the provided screws. Ensure it is level before tightening.
• Bolted Spacers: These spacers use bolts to secure them to the existing flange. Drill pilot holes if necessary and then bolt the spacer in place. Ensure it's level using a level.
• Slip-on Spacers: These simply slide over the existing flange. Ensure a secure and level fit.

Step 4: Applying Caulk

Once the spacer is securely installed and level, apply a bead of silicone caulk around the perimeter of the flange and the spacer. This creates a waterproof seal.

Step 5: Toilet Installation

Carefully position your toilet onto the raised flange. Bolt the toilet to the flange according to the manufacturer's instructions. Use the appropriate washers and nuts.

Step 6: Final Check

Once the toilet is installed, check again for levelness. Ensure all bolts are tight and that the seal is complete. Run water and check for any leaks.

Troubleshooting Common Issues

• Uneven Floor: If the floor is uneven, you may need to shim the spacer to ensure a level installation.
• Spacer Doesn't Fit: Double-check your measurements and ensure you’ve selected the correct spacer type.
• Leaks: Recheck the caulk seal and ensure all bolts are tightened appropriately. If leaks persist, you may need to redo the installation.

Conclusion

Installing a closet flange spacer can significantly improve your toilet installation. By following these steps and utilizing the right tools, you can ensure a successful and leak-free outcome. Remember, always prioritize safety and take your time. If you're unsure about any aspect of the installation, consider consulting a professional plumber.