Compressing copper pipes using compression fittings involves a mechanical process where a nut and ferrule (or compression ring) create a watertight seal when tightened onto the pipe. Here’s how it’s done:
Step-by-Step Guide to Using Compression Fittings on Copper Pipes
- Prepare the Pipe: Ensure the copper pipe end is clean, smooth, and free from burrs. A pipe cutter or deburring tool can help achieve this.
- Slide on the Components:
- First, slide the new compression nut onto the pipe, with the threads facing the end of the pipe.
- Next, place the new ferrule (compression ring) over the pipe.
- Insert the Pipe into the Fitting Body:
- Insert the pipe into the fitting body until it stops.
- Tighten the Nut:
- Hand-tighten the compression nut onto the fitting body.
- Use a wrench to further tighten the nut, usually 1 to 1.5 turns beyond hand-tight. Be careful not to overtighten, which can damage the fitting or the pipe.
- Check for Leaks:
- Turn on the water supply and check for any leaks. If there are leaks, tighten the nut slightly more. If leaks persist, dismantle the fitting, inspect the parts for damage or improper placement, and reassemble it.
Understanding Compression Fittings
Compression fittings work by applying pressure with the compression nut on the ferrule, causing it to grip tightly against the pipe and the fitting body. This compression creates a watertight seal. They are commonly used to join copper pipes, especially in applications where soldering is not feasible.
Key Considerations
- Proper Alignment: Ensure the pipe is properly aligned with the fitting body before tightening.
- Correct Tightening: Too loose, and it will leak; too tight, it can damage the fitting or pipe.
- Use New Parts: Always use new ferrules and nuts for each new connection.