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Measure and Cut the Waste Arm — Measure and Mark the Pipe

Beginner

Part of project

How to Cut and Prepare Copper Pipe for a Perfect Joint · Step 1 of 5

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In this video

Hold the old waste arm pipe in position against the newly installed tailpiece and the other sink's strainer to determine the correct length. Use a marker to mark where the pipe needs to be cut. You can also use a tape measure for a more precise measurement from the face of the tailpiece to the center of the strainer. Use a reciprocating saw or hacksaw to cut the pipe at the mark. After cutting, use a utility knife or deburring tool to clean the inside and outside edges of the cut for a smooth finish.

Goal: Plumbing Pipes Installation

  • Measure twice, cut once. An accurate cut is essential for a leak-free connection.
  • Deburring the pipe after cutting is important to prevent debris from catching in the drain and to ensure the washer seats properly.

Used in this video

  • Marker (Tool Type: Hand Tools, Power Source: Manual)Marking the cut line on the pipe.
  • Tape Measure (Tool Type: Measuring Tools, Power Source: Manual, Brand: Stanley) · optionalMeasuring the required length of the pipe for an accurate cut.
  • Reciprocating Saw (Tool Type: Power Tools, Power Source: Battery, Brand: Milwaukee)Cutting the PVC waste arm pipe.
  • Utility Knife (Tool Type: Hand Tools, Power Source: Manual)Deburring and beveling the cut edge of the pipe.
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Roger Wakefield Plumbing Education

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FAQs

Why is proper cleaning and deburring so important for copper pipe joints?

Thorough cleaning and deburring are critical for creating a strong, leak-free soldered joint. Burrs inside the pipe can restrict water flow and prevent the fitting from seating correctly, while exterior burrs and contaminants inhibit the solder from flowing smoothly and bonding properly with the copper.

Do I really need all the specialized tools listed, like the tube cutter and reamer?

Yes, for professional and reliable results, specialized tools are highly recommended. A dedicated tube cutter ensures straight, clean cuts without deforming the pipe, and a reamer is crucial for removing internal burrs that could restrict water flow and compromise the fitting connection. Substitutes often lead to poor quality joints and potential leaks.

What are the most common mistakes beginners make when cutting and preparing copper pipe, and how can I avoid them?

Common mistakes include rushing the cleaning and deburring steps, making inaccurate measurements, and crooked cuts. To avoid these, take your time, double-check all measurements before cutting, and ensure the pipe cutter is square to the pipe for a clean, straight cut. Practice on scrap pieces first.

What safety precautions should I take when working with copper pipe?

Always wear safety glasses to protect your eyes from metal shavings and debris. Consider wearing gloves when handling freshly cut pipe or using emery cloth to prevent cuts and abrasions. Ensure your work area is stable and well-lit to prevent accidents.

Measure and Cut the Waste Arm — How to Cut and Prepare Copper Pipe for a Perfect Joint (Step 1, Video 3) | Stesso