Clean Pipes and Fittings — Clean and Prepare the Copper Pipe
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 6 of 10
In this video
For solder to adhere properly, the copper must be perfectly clean. Use emery cloth to sand the outside of the pipe ends that will go into a fitting. The goal is to remove the oxidized layer and expose shiny, fresh copper. Then, use a wire pipe brush to clean the inside of all fittings. Make sure to clean all surfaces that will be part of the joint. Once cleaned, wipe away any dust and debris with a clean rag.
Goal: Create clean, abraded surfaces for the solder to bond to.
- This is a critical step. Skipping or rushing the cleaning process is the most common cause of failed or leaky solder joints.
- The copper should be bright and shiny after cleaning. If it's still dull, continue sanding.
Used in this video
- Pipe Cleaning Brush (Tool Type: Hand tools, Power Source: Manual) — Cleaning the inside of fittings.
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FAQs
What should I do if the old compression nut and ferrule are seized onto the copper pipe?
Apply penetrating oil, like Blaster PB Penetrating Oil, directly to the nut and ferrule. Allow it to soak for 15-30 minutes before attempting to loosen it again with your adjustable wrench. If it's still stuck, you may need to carefully cut the old ferrule off with a small hacksaw or specialized tool, taking care not to damage the copper pipe itself.
How can I prevent leaks after installing the new angle stop?
Ensure the copper pipe is clean, smooth, and free of burrs or scratches where the new ferrule will sit. Hand-tighten the compression nut first, then use your adjustable wrench to tighten it an additional half to three-quarters of a turn. Avoid overtightening, as this can damage the ferrule or pipe, but ensure it's snug enough to prevent drips.
Do I really need to shut off the main water supply for this project?
Yes, absolutely. Shutting off the main water supply is crucial to prevent significant flooding when you remove the old valve. Always relieve any remaining water pressure by opening a nearby faucet after shutting off the main supply, before starting work under the sink.
How long should this project typically take for a beginner?
For a DIY beginner, expect this project to take approximately 1 to 2 hours. This accounts for time to gather tools, carefully follow each step, and troubleshoot minor issues like a stubborn old valve or initial small leaks. Taking your time will help ensure a successful installation.
Clean Pipes and Fittings — Clean and Prepare the Copper Pipe
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 6 of 10
In this video
For solder to adhere properly, the copper must be perfectly clean. Use emery cloth to sand the outside of the pipe ends that will go into a fitting. The goal is to remove the oxidized layer and expose shiny, fresh copper. Then, use a wire pipe brush to clean the inside of all fittings. Make sure to clean all surfaces that will be part of the joint. Once cleaned, wipe away any dust and debris with a clean rag.
Goal: Create clean, abraded surfaces for the solder to bond to.
- This is a critical step. Skipping or rushing the cleaning process is the most common cause of failed or leaky solder joints.
- The copper should be bright and shiny after cleaning. If it's still dull, continue sanding.
Used in this video
- Pipe Cleaning Brush (Tool Type: Hand tools, Power Source: Manual) — Cleaning the inside of fittings.
Frequently Asked Questions
What should I do if the old compression nut and ferrule are seized onto the copper pipe?
Apply penetrating oil, like Blaster PB Penetrating Oil, directly to the nut and ferrule. Allow it to soak for 15-30 minutes before attempting to loosen it again with your adjustable wrench. If it's still stuck, you may need to carefully cut the old ferrule off with a small hacksaw or specialized tool, taking care not to damage the copper pipe itself.
How can I prevent leaks after installing the new angle stop?
Ensure the copper pipe is clean, smooth, and free of burrs or scratches where the new ferrule will sit. Hand-tighten the compression nut first, then use your adjustable wrench to tighten it an additional half to three-quarters of a turn. Avoid overtightening, as this can damage the ferrule or pipe, but ensure it's snug enough to prevent drips.
Do I really need to shut off the main water supply for this project?
Yes, absolutely. Shutting off the main water supply is crucial to prevent significant flooding when you remove the old valve. Always relieve any remaining water pressure by opening a nearby faucet after shutting off the main supply, before starting work under the sink.
How long should this project typically take for a beginner?
For a DIY beginner, expect this project to take approximately 1 to 2 hours. This accounts for time to gather tools, carefully follow each step, and troubleshoot minor issues like a stubborn old valve or initial small leaks. Taking your time will help ensure a successful installation.