Cut PEX Tube — Measure and Cut PEX
Part of project
How to Replace a Section of Galvanized Pipe with PEX · Step 5 of 7
In this video
To begin, use a PEX cutting tool to cut the PEX tubing as close to the brass fitting as possible. The goal is to leave very little tubing extending past the crimp ring. This provides clear access for the ring removal tool in the next step. If you cut it too long initially, you can shave off small pieces until it is nearly flush with the ring.
Goal: Prepare for ring removal
- Cutting the tube as close as possible to the fitting makes it easier for the ring cutter to work effectively.
- Be careful not to let the blade of the cutter come into contact with the brass fitting, as this could damage it.
Used in this video
- PEX Cutter (brand: Lenox, Tool Type: Hand Tools) — To cut the PEX tubing cleanly and precisely.
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FAQs
How difficult is this project for a DIY beginner, and how long should I expect it to take?
This project is rated for beginners, but it requires careful attention to detail and precision. For replacing a small section, a DIY beginner should realistically budget 2-4 hours, accounting for material gathering, preparation, and thorough leak testing. Factors like pipe accessibility and unexpected issues can extend this timeframe.
What are the most critical safety precautions I need to take when cutting old galvanized pipe and working with water?
Always shut off the main water supply and drain the lines completely before attempting any cuts. Wear appropriate personal protective equipment (PPE), including safety glasses, work gloves, and hearing protection, especially when using a reciprocating saw. Be prepared for residual water and rust flakes to emerge from the old galvanized pipe, and have a bucket and rags ready.
Do I need all the specialized tools listed, or can I use more common alternatives for this PEX replacement?
While specific tools like a PEX pipe cutter and depth gauge are highly recommended for clean, accurate, and reliable PEX connections, some alternatives can be used. A reciprocating saw with a metal-cutting blade is ideal for galvanized pipe, but a pipe cutter can work if space allows. Avoid using a hacksaw for PEX as it can create burrs, hindering a proper seal. Investing in the correct tools minimizes common mistakes.
What are common mistakes DIYers make when connecting PEX to galvanized pipe, and how can I ensure a leak-free joint?
A common mistake is not properly preparing the galvanized pipe end (e.g., failing to clean threads thoroughly, not applying enough pipe dope/Teflon tape) or not fully seating the PEX into push-to-connect fittings. Ensure the existing galvanized pipe end is clean, dry, and free of burrs. For push-to-connect fittings, use a depth gauge to mark the PEX, and push it firmly until it bottoms out inside the fitting, then give it a slight pull to confirm engagement. Test all new connections meticulously before finishing.
Cut PEX Tube — Measure and Cut PEX
Part of project
How to Replace a Section of Galvanized Pipe with PEX · Step 5 of 7
In this video
To begin, use a PEX cutting tool to cut the PEX tubing as close to the brass fitting as possible. The goal is to leave very little tubing extending past the crimp ring. This provides clear access for the ring removal tool in the next step. If you cut it too long initially, you can shave off small pieces until it is nearly flush with the ring.
Goal: Prepare for ring removal
- Cutting the tube as close as possible to the fitting makes it easier for the ring cutter to work effectively.
- Be careful not to let the blade of the cutter come into contact with the brass fitting, as this could damage it.
Used in this video
- PEX Cutter (brand: Lenox, Tool Type: Hand Tools) — To cut the PEX tubing cleanly and precisely.
Frequently Asked Questions
How difficult is this project for a DIY beginner, and how long should I expect it to take?
This project is rated for beginners, but it requires careful attention to detail and precision. For replacing a small section, a DIY beginner should realistically budget 2-4 hours, accounting for material gathering, preparation, and thorough leak testing. Factors like pipe accessibility and unexpected issues can extend this timeframe.
What are the most critical safety precautions I need to take when cutting old galvanized pipe and working with water?
Always shut off the main water supply and drain the lines completely before attempting any cuts. Wear appropriate personal protective equipment (PPE), including safety glasses, work gloves, and hearing protection, especially when using a reciprocating saw. Be prepared for residual water and rust flakes to emerge from the old galvanized pipe, and have a bucket and rags ready.
Do I need all the specialized tools listed, or can I use more common alternatives for this PEX replacement?
While specific tools like a PEX pipe cutter and depth gauge are highly recommended for clean, accurate, and reliable PEX connections, some alternatives can be used. A reciprocating saw with a metal-cutting blade is ideal for galvanized pipe, but a pipe cutter can work if space allows. Avoid using a hacksaw for PEX as it can create burrs, hindering a proper seal. Investing in the correct tools minimizes common mistakes.
What are common mistakes DIYers make when connecting PEX to galvanized pipe, and how can I ensure a leak-free joint?
A common mistake is not properly preparing the galvanized pipe end (e.g., failing to clean threads thoroughly, not applying enough pipe dope/Teflon tape) or not fully seating the PEX into push-to-connect fittings. Ensure the existing galvanized pipe end is clean, dry, and free of burrs. For push-to-connect fittings, use a depth gauge to mark the PEX, and push it firmly until it bottoms out inside the fitting, then give it a slight pull to confirm engagement. Test all new connections meticulously before finishing.