Step 1: Materials
- String. Best is fine nylon cord, but it just needs to be strong. Several feet (a meter or so) long.
- Tools: A knife or scissors.
Step 2: Optional step - If using copper tube, flare the end just a bit.
Step 4: Make second wrap
Step 5: Third wrap
Step 6: This won't come apart
Each successive wrap increases compression considerably. If you later cut the string loose, you will see the the deep imprint of the string and it will be obvious how tight the connection was.