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Cut Cast Iron Pipe — Remove the Cut Pipe Section

Intermediate8 hours

Part of project

How to Replace a Cracked Cast Iron Drain Pipe with PVC · Step 4 of 8

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In this video

The first step is to remove the damaged section of the cast iron pipe. Using a reciprocating saw equipped with a Milwaukee 'The Wrecker' blade, carefully make two cuts through the pipe to isolate the section that needs to be replaced. Ensure you have enough space to work and a clear cutting path.

Goal: Plumbing Pipes Replacement

  • Wear safety glasses to protect your eyes from metal shavings and debris.
  • A blade specifically designed for cutting metal is essential for efficiently cutting through cast iron.

Used in this video

  • Reciprocating Saw (brand: Ryobi, Power Source: Battery-powered)Cutting the cast iron pipe.
  • Metal Cutting Saw Blade (brand: Milwaukee The Wrecker, Material: Metal)Cutting through the cast iron pipe with the reciprocating saw.
418.3K views3.4K15-30 minutes
Lowe's Home Improvement

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FAQs

What are the most critical safety precautions I need to take when working with old cast iron drain pipes?

Always wear heavy-duty gloves, safety glasses, and a dust mask when cutting cast iron due to sharp edges and fine particles. Ensure the pipe is properly supported both above and below your cut marks to prevent collapse, and be prepared for potential wastewater.

Is this an advanced DIY project, and what's a realistic time estimate for a first-timer?

This project is rated intermediate due to the precision required for cutting cast iron and working in potentially cramped spaces. While estimated at 8 hours, a first-timer should budget a full weekend to account for unexpected challenges, tool rentals, or supply runs.

Besides basic hand tools, what specialized equipment is essential for cutting cast iron and connecting PVC?

You'll need an angle grinder with a diamond or abrasive metal cutting wheel for the cast iron, or a specialized cast iron pipe cutter. A torque wrench, like the Husky 1/2 in. Click Torque Wrench H2DTW listed, is crucial for properly tightening the shielded couplings to prevent leaks.

What are the most common mistakes DIYers make when replacing cast iron with PVC, and how can I avoid them?

Common mistakes include inadequate pipe support, imprecise measurements leading to gaps or stress, and improperly tightened couplings. Always over-support the existing pipe, measure twice (or thrice) before cutting, and use a torque wrench to ensure couplings are tightened to the manufacturer's specifications.