Description
Product Overview
The Oatey cast iron flange is a robust replacement for broken toilet flanges, crafted from durable iron with an unfinished exterior finish. It features a round shape, 4-inch inside thread size, and a thickness of 1 inch, ensuring compatibility with standard plumbing systems. This flange installs inside 4-inch pipes, including service weight, heavy weight, and no hub types, and solvent welds inside 4-inch or over 3-inch Schedule 40 DWV pipe for a secure fit. With a weight of 3.28 pounds and included instruction guide, it supports smooth, unrestricted flow and is backed by a 1-year limited warranty, making it a reliable choice for various applications.

Usage
This flange is ideal for replacing damaged cast iron toilet flanges in residential and commercial plumbing systems, such as in bathrooms, kitchens, or utility areas. It suits DIY enthusiasts and professional plumbers who need a tool-free installation solution for pipes that are cut short or require quick repairs. Common occasions include remodeling projects, emergency fixes, or routine maintenance where a durable, expandable gasket ensures a tight seal in service weight, heavy weight, and no hub pipes.
Why Choose Us
Oatey flanges stand out due to their high-quality cast iron construction, which resists corrosion and wear for long-term reliability. The expandable gasket design allows for a custom fit without additional tools, reducing installation time and effort. With a 4.8-star rating from customer reviews and a best-seller rank in faucet flanges, this product offers proven performance and trusted brand support, ensuring you get a solution that meets plumbing standards and user satisfaction.
Key Features
- Replaces broken cast iron toilet flanges with durable iron material for extended lifespan.
- Installs easily without tools, saving time and effort during plumbing repairs.
- Smooth unrestricted flow design minimizes clogs and improves drainage efficiency.
- Gasket expands to fit inside service weight, heavy weight, and no hub pipe for versatile compatibility.
- Longer length accommodates pipes cut short, ensuring a secure and reliable connection.
FAQ
What types of pipes does this flange fit?
It fits inside 4-inch pipes, including service weight, heavy weight, and no hub types, and can solvent weld inside 4-inch or over 3-inch Schedule 40 DWV pipe for a tight seal.
Is tool-free installation possible?
Yes, the flange installs easily without tools, thanks to its expandable gasket design that adapts to the pipe interior for quick and secure setup.
What is the warranty coverage?
This product comes with a 1-year limited warranty from Oatey, covering defects in materials and workmanship under normal use conditions.
Can it be used for pipes that are cut short?
Absolutely, the longer length of the flange allows it to accommodate pipes that have been cut short, providing a reliable replacement without needing extensive modifications.
What materials is the flange made from?
It is constructed from cast iron with an unfinished finish, ensuring durability and resistance to wear in various plumbing environments.




Oatey Cast Iron Flange 4 Inch Unfinished Toilet Repair
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