Measure Toilet Rough-In Distance — Measure Gap and Dry Fit Extender(s)
Part of project
How to Install a Toilet Flange Extender After Tiling · Step 2 of 6
In this video
To ensure your new toilet will fit correctly, you must measure the rough-in distance. Begin by placing the end of a tape measure against the finished wall directly behind the toilet flange. The measurement should be taken from the surface of the wall, not the baseboard. Extend the tape measure out to the center of the toilet flange, using the closet bolts as a guide for the centerline. A standard toilet rough-in is 12 inches from the finished wall to the center of the drain. Verify this distance. If you are framing a new bathroom, ensure you account for the thickness of the drywall (typically half an inch) when setting the flange.
Goal: Plumbing
- Measure from the finished wall, not the underlying studs. Measuring from the studs will result in a shorter distance once drywall is installed, causing the toilet tank to not fit.
- Giving yourself an extra inch (for a 13-inch rough-in) can make installation easier and provide space for a shelf behind the toilet later.
Used in this video
- Tape Measure (brand: Unspecified) — Measuring the distance from the finished wall to the center of the toilet flange.
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FAQs
Why do I need a toilet flange extender after tiling, and how do I know if I need one?
Tiling often raises the floor level, causing the existing toilet flange to sit too low. This prevents the wax ring from creating a proper, watertight seal, leading to potential leaks. You know you need an extender if the top of your existing flange is below the new finished floor level.
Is installing a toilet flange extender a difficult DIY project for a beginner, and how long does it typically take?
This project is rated as 'beginner' difficulty because it primarily involves careful measurement, cleaning, and sealing, not complex plumbing pipework. Most DIYers can complete it in approximately 3 hours, assuming all necessary tools and materials are readily available.
What are the most crucial tools and materials I'll need to ensure a successful, leak-free installation?
Beyond basic tools like a tape measure and caulk gun, a quality toilet flange extender kit and a reliable silicone sealant are critical. Don't skip on robust #10 3” wood screws for securely fastening the extender to the subfloor, as any movement can compromise the seal. Thorough cleaning materials are also essential.
What are the common mistakes to avoid when installing a toilet flange extender to prevent future leaks?
The most common mistakes include not thoroughly cleaning the old flange, failing to apply sufficient silicone sealant for a waterproof bond, and not securing the extender firmly to the subfloor. Always dry-fit the extender to ensure the correct height (flush or slightly above the finished floor) before applying sealant.
Measure Toilet Rough-In Distance — Measure Gap and Dry Fit Extender(s)
Part of project
How to Install a Toilet Flange Extender After Tiling · Step 2 of 6
In this video
To ensure your new toilet will fit correctly, you must measure the rough-in distance. Begin by placing the end of a tape measure against the finished wall directly behind the toilet flange. The measurement should be taken from the surface of the wall, not the baseboard. Extend the tape measure out to the center of the toilet flange, using the closet bolts as a guide for the centerline. A standard toilet rough-in is 12 inches from the finished wall to the center of the drain. Verify this distance. If you are framing a new bathroom, ensure you account for the thickness of the drywall (typically half an inch) when setting the flange.
Goal: Plumbing
- Measure from the finished wall, not the underlying studs. Measuring from the studs will result in a shorter distance once drywall is installed, causing the toilet tank to not fit.
- Giving yourself an extra inch (for a 13-inch rough-in) can make installation easier and provide space for a shelf behind the toilet later.
Used in this video
- Tape Measure (brand: Unspecified) — Measuring the distance from the finished wall to the center of the toilet flange.
Frequently Asked Questions
Why do I need a toilet flange extender after tiling, and how do I know if I need one?
Tiling often raises the floor level, causing the existing toilet flange to sit too low. This prevents the wax ring from creating a proper, watertight seal, leading to potential leaks. You know you need an extender if the top of your existing flange is below the new finished floor level.
Is installing a toilet flange extender a difficult DIY project for a beginner, and how long does it typically take?
This project is rated as 'beginner' difficulty because it primarily involves careful measurement, cleaning, and sealing, not complex plumbing pipework. Most DIYers can complete it in approximately 3 hours, assuming all necessary tools and materials are readily available.
What are the most crucial tools and materials I'll need to ensure a successful, leak-free installation?
Beyond basic tools like a tape measure and caulk gun, a quality toilet flange extender kit and a reliable silicone sealant are critical. Don't skip on robust #10 3” wood screws for securely fastening the extender to the subfloor, as any movement can compromise the seal. Thorough cleaning materials are also essential.
What are the common mistakes to avoid when installing a toilet flange extender to prevent future leaks?
The most common mistakes include not thoroughly cleaning the old flange, failing to apply sufficient silicone sealant for a waterproof bond, and not securing the extender firmly to the subfloor. Always dry-fit the extender to ensure the correct height (flush or slightly above the finished floor) before applying sealant.