Leverage and Remove Steel Pipe — Remove the Lead and Oakum Seal
Part of project
How to Replace a Cast Iron Toilet Flange with PVC · Step 4 of 10
In this video
After removing about half of the lead, a ball-peen hammer is inserted head-first into the steel pipe to be used as a lever. By twisting and pulling on the hammer handle, the remaining seal is broken, and the pipe begins to turn. Another hammer is briefly used to tap the first hammer, likely to seat it more firmly. With sustained twisting force, the steel pipe is finally freed and pulled out of the cast iron hub.
Goal: Extract the old steel pipe.
- Striking one hammer with another can cause metal shards to fly off. Always wear safety glasses during this process.
- A large pry bar or pipe wrench can also provide the necessary leverage if it fits in the space.
Used in this video
- Ball-peen Hammer (Tool Type: Hand Tools, Power Source: Manual) — Acting as a lever to twist the pipe out
- Claw Hammer (Tool Type: Hand Tools, Power Source: Manual) · optional — Tapping the first hammer to seat it for better grip
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FAQs
How difficult is replacing a cast iron toilet flange with PVC, and how long should I expect it to take?
This project is rated as intermediate. While it doesn't require specialized plumbing skills, removing the old cast iron and lead/oakum seal can be physically demanding and time-consuming. Expect it to take anywhere from half a day to a full day, especially if you encounter unexpected issues like a stubborn old flange.
What specialized tools are absolutely essential for removing the old cast iron flange and its lead/oakum seal?
Beyond basic household tools, you'll definitely need a cold chisel and a hammer for breaking up the old cast iron and carefully removing the lead/oakum seal. A shop vacuum is also crucial for quickly cleaning up debris and ensuring the cast iron pipe is spotless before installing the new flange.
What are the most important safety precautions I should take when demolishing the old cast iron flange and seal?
Always wear heavy-duty safety glasses to protect against flying fragments and a respirator (like the Honeywell R95) to avoid inhaling dust and potential lead particles from the old seal. Heavy-duty gloves are also essential to protect your hands from sharp edges and the demolition tools.
What's a common mistake when installing the new PVC compression flange, and how can I avoid it?
A common mistake is not thoroughly cleaning and deburring the inside of the cast iron pipe after removing the old flange. Any rough edges, rust, or debris can compromise the compression seal of the new PVC flange, leading to leaks. Ensure the pipe's interior is smooth and completely clean for a watertight fit.
Leverage and Remove Steel Pipe — Remove the Lead and Oakum Seal
Part of project
How to Replace a Cast Iron Toilet Flange with PVC · Step 4 of 10
In this video
After removing about half of the lead, a ball-peen hammer is inserted head-first into the steel pipe to be used as a lever. By twisting and pulling on the hammer handle, the remaining seal is broken, and the pipe begins to turn. Another hammer is briefly used to tap the first hammer, likely to seat it more firmly. With sustained twisting force, the steel pipe is finally freed and pulled out of the cast iron hub.
Goal: Extract the old steel pipe.
- Striking one hammer with another can cause metal shards to fly off. Always wear safety glasses during this process.
- A large pry bar or pipe wrench can also provide the necessary leverage if it fits in the space.
Used in this video
- Ball-peen Hammer (Tool Type: Hand Tools, Power Source: Manual) — Acting as a lever to twist the pipe out
- Claw Hammer (Tool Type: Hand Tools, Power Source: Manual) · optional — Tapping the first hammer to seat it for better grip
Frequently Asked Questions
How difficult is replacing a cast iron toilet flange with PVC, and how long should I expect it to take?
This project is rated as intermediate. While it doesn't require specialized plumbing skills, removing the old cast iron and lead/oakum seal can be physically demanding and time-consuming. Expect it to take anywhere from half a day to a full day, especially if you encounter unexpected issues like a stubborn old flange.
What specialized tools are absolutely essential for removing the old cast iron flange and its lead/oakum seal?
Beyond basic household tools, you'll definitely need a cold chisel and a hammer for breaking up the old cast iron and carefully removing the lead/oakum seal. A shop vacuum is also crucial for quickly cleaning up debris and ensuring the cast iron pipe is spotless before installing the new flange.
What are the most important safety precautions I should take when demolishing the old cast iron flange and seal?
Always wear heavy-duty safety glasses to protect against flying fragments and a respirator (like the Honeywell R95) to avoid inhaling dust and potential lead particles from the old seal. Heavy-duty gloves are also essential to protect your hands from sharp edges and the demolition tools.
What's a common mistake when installing the new PVC compression flange, and how can I avoid it?
A common mistake is not thoroughly cleaning and deburring the inside of the cast iron pipe after removing the old flange. Any rough edges, rust, or debris can compromise the compression seal of the new PVC flange, leading to leaks. Ensure the pipe's interior is smooth and completely clean for a watertight fit.