How to Cut Plumbing Pipes and Tubing

A leaky pipe can be a huge hassle for homeowners, but fixing plumbing issues doesn’t have to be a headache. Cutting plumbing pipes and tubing for repair work is simple, so long as you have the right materials and a plan of attack. Read our guide below for tips on how to cut different types of tubing and safety precautions you should take before you get to work. 

Different Materials for Pipes and Tubing

Each type of pipe material calls for different equipment and unique cutting methods. Read up on the different types of piping you might encounter in your home’s plumbing system below.  

Copper Pipes

Copper pipes are popular among homeowners because they’re durable, visually appealing, and resistant to corrosion. They’re commonly found in water supply lines, and can last for decades. 

PVC Pipes

Polyvinyl chloride pipes are popular for drain, waste, and vent systems. They’re lightweight, affordable, and resistant to chemicals, which makes them ideal for many plumbing setups. They’re versatile enough for residential and commercial use, and they are especially suitable for do-it-yourself projects. 

Steel Pipes

Steel pipes are strong, durable, and common parts of gas lines and older water systems. They’re more challenging to cut than other materials, and require precise cuts for proper installation and long-lasting performance. 

PEX Tubing

Cross-linked polyethylene tubing is a flexible plastic pipe that’s becoming increasingly popular for use in plumbing. PEX tubing is easy to work with and resistant to freezing. 

Tools for Cutting Plumbing Pipes

Start your pipe-cutting project by gathering the tools below. 

• Deburring tool
• Hacksaw
• Measuring tape
• PEX tubing cutter
• Pipe cutters for copper and steel
• PVC pipe saw or ratcheting cutter
• Reciprocating saw
• Safety glasses

Cutting Copper Pipes

Follow the steps below to cut copper pipes, which are most typical in residential plumbing. Pay close attention to measurements and the technique you use to cut. Over-tightening the cutter can bend, warp, or otherwise deform the pipe and make it challenging to fit connections.

1. Measure and mark the cutting point on the pipe.
2. Place a tubing cutter around the pipe at the marked point.
3. Tighten the cutter slightly and rotate it around the pipe.
4. Gradually tighten the cutter after each rotation until you’ve severed the pipe.
5. Use a deburring tool to smooth the cut edge.

Cutting PVC Pipes

PVC pipes are relatively easy to cut, but you must achieve a clean, straight cut for solid connections. Follow these steps:

1. Measure and mark the cutting point on the pipe.
2. Use a PVC pipe saw or ratcheting cutter to make the cut.
3. If you’re using a saw, rotate the pipe slightly as you cut to keep the line straight.
4. Smooth the cut edge with a deburring tool or sandpaper.

If you’re cutting PVC pipes below floor level, use a special drill attachment to cut the pipe from the inside. This tool gives you a precise cut in hard-to-reach areas.

Cutting Steel Pipes

It’s more difficult to cut steel pipes than it is to cut copper or PVC. You have to be strong enough to push through the material, and patient enough to work slowly and methodically for a clean cut. Here’s how to approach steel pipes:

1. Secure the pipe in a vise or pipe clamp.
2. Mark the cutting point on the pipe.
3. Use a steel pipe cutter or hacksaw to cut through the pipe.
4. If you’re using a hacksaw, rotate the pipe slightly as you cut to maintain a straight line.
5. File the cut edge to remove any burrs.

Cutting PEX Tubing

PEX tubing is flexible, but it can be tricky to cut correctly. Here’s how to cut PEX tubing the right way

1. Measure and mark the cutting point on the tubing.
2. Use a specialized PEX tubing cutter to make a straight cut.
3. Keep the cut perpendicular to the tubing’s length.
4. Check for any burrs or uneven edges, and remove them if necessary.

Special Cutting Techniques

Standard cutting methods don’t always get the job done when it comes to cutting tubing. Below are some special techniques for unique situations:

Cutting Pipes in Tight Spaces

Try one of the tools below if there’s not enough room to use a standard pipe cutter:

• Close-quarters tubing cutter: A compact tool designed for tight spaces
• Imp cutter: Good for use in small areas, and adjustable to handle various pipe sizes
• Mini hacksaw: Ideal for cutting copper or PVC in confined areas

Cutting Cast Iron Pipes

Cast iron pipes, which you might typically find in older homes, require specialized tools. These pipes are very dense, and you can damage them if you don’t handle them properly. Be patient when you cut cast iron pipes, and remember that they take a lot of strength. Follow the steps below once you’re ready.

1. Wrap a cast iron pipe cutter’s chain mechanism around the pipe at the cutting point. 
2. Tighten the chain and ratchet the handle to apply pressure.
3. Continue ratcheting until the pipe snaps, and smooth out any burs.

Safety Precautions for Cutting Pipes and Tubing

Make your safety a priority when you’re cutting plumbing pipes. Follow the guidelines below to prevent accidents, damage, and injury:

• Keep your space properly ventilated.
• Keep your work area clean and free of tripping hazards.
• Secure pipes properly before cutting to prevent injury. Ask a friend or family member to help.
• Use thick, reinforced work gloves to prevent cuts and scrapes.
• Wear safety glasses to protect your eyes from debris and any pieces of piping that may snap off and fly away.

Tips for Clean, Precise Cuts

Follow the directions below to achieve professional-level results: 

• Invest in high-quality tools, and keep them sharp. 
• Measure twice and cut once to avoid wasting materials.
• Practice cutting on scrap pieces.
• Use a miter box for straight cuts.
• Use a pipe reamer or deburring tool to smooth cut edges.

Tools