Measure and Set the Toilet Drain Rough-In — 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
The plumber positions the PVC drain pipe assembly between the wooden floor joists. Using a tape measure, he measures the distance from the bare wood wall framing to the center of the toilet drain fitting. He explains that while a 12-inch rough-in from the framing is typical for a standard drywall finish, he is setting his at 13 inches. This extra inch accounts for the future installation of half-inch drywall and tile, ensuring the toilet will fit correctly against the finished wall.
Goal: Toilet Installation (Standard)
- For a standard wall with just 1/2-inch drywall, a 12-inch measurement from the rough framing will typically result in the correct placement.
- Always confirm the rough-in dimension required by the specific toilet model you plan to install, as some may vary from the standard 12 inches.
Used in this video
- Tape Measure (brand: Unknown, Measuring Tape Type: Standard tape measure) — Measuring the distance from the wall framing to the center of the drain pipe.
- Level (brand: Unknown, Level Type: Torpedo level) — Ensuring the drain pipe has the correct slope for proper drainage (visible but not actively used in the clip).
278K subscribers
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 and Set the Toilet Drain Rough-In — 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
The plumber positions the PVC drain pipe assembly between the wooden floor joists. Using a tape measure, he measures the distance from the bare wood wall framing to the center of the toilet drain fitting. He explains that while a 12-inch rough-in from the framing is typical for a standard drywall finish, he is setting his at 13 inches. This extra inch accounts for the future installation of half-inch drywall and tile, ensuring the toilet will fit correctly against the finished wall.
Goal: Toilet Installation (Standard)
- For a standard wall with just 1/2-inch drywall, a 12-inch measurement from the rough framing will typically result in the correct placement.
- Always confirm the rough-in dimension required by the specific toilet model you plan to install, as some may vary from the standard 12 inches.
Used in this video
- Tape Measure (brand: Unknown, Measuring Tape Type: Standard tape measure) — Measuring the distance from the wall framing to the center of the drain pipe.
- Level (brand: Unknown, Level Type: Torpedo level) — Ensuring the drain pipe has the correct slope for proper drainage (visible but not actively used in the clip).
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.