Cut the Pipe — Cut the Cast Iron Pipe
Part of project
How to Connect a PVC Drain to a Cast Iron Pipe · Step 4 of 9
In this video
Wearing safety gloves and glasses, insert the assembled pipe cutter into the PVC pipe. Bring the drill up to speed and gently press sideways against the inner wall of the pipe. Rotate the drill around the inside of the pipe, allowing the blade to cut through the material. The depth guide will rest against the end of the pipe, preventing the tool from going further and ensuring a flush cut at the set depth. Continue until the section of pipe is completely severed.
Goal: Cut the PVC pipe from the inside
- Wear safety glasses to protect your eyes from plastic shavings.
- Apply gentle, steady pressure. Let the tool do the work to avoid a jagged cut.
Used in this video
- Assembled Internal Pipe Cutter (brand: Reed) — Cutting the pipe.
- Safety Gloves (brand: MaxiFlex) — To protect hands during the cutting process.
- Safety Glasses — To protect eyes from flying debris.
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FAQs
What are the most important safety precautions when cutting cast iron pipe?
When cutting cast iron, always wear 3M Professional Chemical Splash/Impact Safety Goggles, MCR Safety BearKat Safety Glasses, and a 3M P100 Household Respirator to protect against dust and debris. Cast iron is heavy, so ensure the pipe is well-supported with 2 in. x 4 in. dimensional lumber before and during cutting to prevent injury or damage.
Do I need a special blade for cutting cast iron with a reciprocating saw?
Yes, a standard reciprocating saw blade will not work effectively on cast iron. You will need a Milwaukee 12 Amp SAWZALL Reciprocating Saw equipped with a DIABLO 9 in. Diamond Grit Reciprocating Saw Blade for Cast Iron Cutting. This specialized blade is designed to cut through the hard material efficiently and safely.
How do I properly support the cast iron pipe to prevent it from falling after I cut it?
Before making your cut, use 2 in. x 4 in. dimensional lumber to create temporary supports on both sides of the cut line. Secure these supports to a stable surface, ensuring they can bear the pipe's weight and prevent any movement, cracking, or collapse during the cutting process.
Why is a shielded flexible coupling recommended for connecting PVC to cast iron, and how do I install it correctly?
A shielded flexible coupling creates a durable, leak-free seal between cast iron and PVC, accommodating slight differences in pipe diameter and vibration. Ensure both pipe ends are clean and deburred before installing the coupling, then tighten the stainless steel bands evenly to the manufacturer's specified torque using a TEKTON 7/16 in. Nut Driver.
Cut the Pipe — Cut the Cast Iron Pipe
Part of project
How to Connect a PVC Drain to a Cast Iron Pipe · Step 4 of 9
In this video
Wearing safety gloves and glasses, insert the assembled pipe cutter into the PVC pipe. Bring the drill up to speed and gently press sideways against the inner wall of the pipe. Rotate the drill around the inside of the pipe, allowing the blade to cut through the material. The depth guide will rest against the end of the pipe, preventing the tool from going further and ensuring a flush cut at the set depth. Continue until the section of pipe is completely severed.
Goal: Cut the PVC pipe from the inside
- Wear safety glasses to protect your eyes from plastic shavings.
- Apply gentle, steady pressure. Let the tool do the work to avoid a jagged cut.
Used in this video
- Assembled Internal Pipe Cutter (brand: Reed) — Cutting the pipe.
- Safety Gloves (brand: MaxiFlex) — To protect hands during the cutting process.
- Safety Glasses — To protect eyes from flying debris.
Frequently Asked Questions
What are the most important safety precautions when cutting cast iron pipe?
When cutting cast iron, always wear 3M Professional Chemical Splash/Impact Safety Goggles, MCR Safety BearKat Safety Glasses, and a 3M P100 Household Respirator to protect against dust and debris. Cast iron is heavy, so ensure the pipe is well-supported with 2 in. x 4 in. dimensional lumber before and during cutting to prevent injury or damage.
Do I need a special blade for cutting cast iron with a reciprocating saw?
Yes, a standard reciprocating saw blade will not work effectively on cast iron. You will need a Milwaukee 12 Amp SAWZALL Reciprocating Saw equipped with a DIABLO 9 in. Diamond Grit Reciprocating Saw Blade for Cast Iron Cutting. This specialized blade is designed to cut through the hard material efficiently and safely.
How do I properly support the cast iron pipe to prevent it from falling after I cut it?
Before making your cut, use 2 in. x 4 in. dimensional lumber to create temporary supports on both sides of the cut line. Secure these supports to a stable surface, ensuring they can bear the pipe's weight and prevent any movement, cracking, or collapse during the cutting process.
Why is a shielded flexible coupling recommended for connecting PVC to cast iron, and how do I install it correctly?
A shielded flexible coupling creates a durable, leak-free seal between cast iron and PVC, accommodating slight differences in pipe diameter and vibration. Ensure both pipe ends are clean and deburred before installing the coupling, then tighten the stainless steel bands evenly to the manufacturer's specified torque using a TEKTON 7/16 in. Nut Driver.