Install the SharkBite Fitting — Insert and Seat the PVC Pipe
Part of project
How to Connect PVC Drain Pipe to a Cast Iron Hub · Step 6 of 7
In this video
With the pipe prepared and marked, push the SharkBite fitting onto the end of the pipe. You will feel an initial resistance as the pipe goes past the stainless steel grab teeth. Continue pushing firmly. You will then feel a second, more subtle point of resistance as the pipe contacts the O-ring. You must apply enough force to push the pipe past this O-ring until it comes to a hard stop. The depth mark you made earlier should now be aligned with the edge of the fitting, confirming it is fully and correctly seated. This creates a secure, watertight connection.
Goal: Securely attach the fitting to the pipe
- Stopping at the O-ring without pushing past it will result in a leak. Ensure the pipe is pushed all the way in until it stops.
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FAQs
Why is a cold chisel listed as a required tool, and how is it used in this project?
A cold chisel, specifically the Dasco Pro 3/4 in. x 12 in. Cold Chisel G410, is essential for carefully excavating the old lead and oakum seal from inside the cast iron hub. It allows you to break apart and remove the old, brittle material without damaging the cast iron itself. Use it with a hammer, chipping away small pieces at a time to ensure a clean interior for the new seal.
What are the most critical safety precautions I should take when connecting PVC to old cast iron pipes?
Always wear safety glasses (like the listed Safety Glasses) to protect your eyes from flying debris, especially when chiseling old material or dealing with rust. Use heavy-duty work gloves (e.g., Husky Large Premium Grain Cowhide Leather Heavy Duty Impact Work Glove) to protect your hands from sharp edges, rust, and potential contaminants. Ensure good ventilation, as old drain pipes can contain unpleasant odors and bacteria.
How long does this project typically take for a beginner, and what's the approximate cost?
For a beginner, this project generally takes 2-4 hours, depending on the condition of the old seal and your comfort level with the tools. The primary cost will be the PVC pipe and fittings, the rubber compression gasket (donut), and a few specialized tools like the cold chisel, totaling roughly $30-$70 if you don't own the tools already. These costs can vary based on local prices and specific product brands.
What's the most common mistake DIYers make when installing the rubber compression gasket, and how can I avoid leaks?
The most common mistake is not thoroughly cleaning the inside of the cast iron hub, which prevents a proper, watertight seal. Ensure the hub is free of all old debris, rust, and scale using a wire brush. Additionally, apply a generous amount of plumber's grease (Oatey 1 oz. Plumber's Grease 30620) to both the gasket and the PVC pipe end to help it slide in smoothly and create a tight seal.
Install the SharkBite Fitting — Insert and Seat the PVC Pipe
Part of project
How to Connect PVC Drain Pipe to a Cast Iron Hub · Step 6 of 7
In this video
With the pipe prepared and marked, push the SharkBite fitting onto the end of the pipe. You will feel an initial resistance as the pipe goes past the stainless steel grab teeth. Continue pushing firmly. You will then feel a second, more subtle point of resistance as the pipe contacts the O-ring. You must apply enough force to push the pipe past this O-ring until it comes to a hard stop. The depth mark you made earlier should now be aligned with the edge of the fitting, confirming it is fully and correctly seated. This creates a secure, watertight connection.
Goal: Securely attach the fitting to the pipe
- Stopping at the O-ring without pushing past it will result in a leak. Ensure the pipe is pushed all the way in until it stops.
Frequently Asked Questions
Why is a cold chisel listed as a required tool, and how is it used in this project?
A cold chisel, specifically the Dasco Pro 3/4 in. x 12 in. Cold Chisel G410, is essential for carefully excavating the old lead and oakum seal from inside the cast iron hub. It allows you to break apart and remove the old, brittle material without damaging the cast iron itself. Use it with a hammer, chipping away small pieces at a time to ensure a clean interior for the new seal.
What are the most critical safety precautions I should take when connecting PVC to old cast iron pipes?
Always wear safety glasses (like the listed Safety Glasses) to protect your eyes from flying debris, especially when chiseling old material or dealing with rust. Use heavy-duty work gloves (e.g., Husky Large Premium Grain Cowhide Leather Heavy Duty Impact Work Glove) to protect your hands from sharp edges, rust, and potential contaminants. Ensure good ventilation, as old drain pipes can contain unpleasant odors and bacteria.
How long does this project typically take for a beginner, and what's the approximate cost?
For a beginner, this project generally takes 2-4 hours, depending on the condition of the old seal and your comfort level with the tools. The primary cost will be the PVC pipe and fittings, the rubber compression gasket (donut), and a few specialized tools like the cold chisel, totaling roughly $30-$70 if you don't own the tools already. These costs can vary based on local prices and specific product brands.
What's the most common mistake DIYers make when installing the rubber compression gasket, and how can I avoid leaks?
The most common mistake is not thoroughly cleaning the inside of the cast iron hub, which prevents a proper, watertight seal. Ensure the hub is free of all old debris, rust, and scale using a wire brush. Additionally, apply a generous amount of plumber's grease (Oatey 1 oz. Plumber's Grease 30620) to both the gasket and the PVC pipe end to help it slide in smoothly and create a tight seal.