Step 4 · Deburr and Clean Pipe Ends

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

After cutting, the pipe ends will have sharp edges and small burrs. These must be removed to prevent them from slicing the O-ring inside the push-to-connect fitting, which would cause a leak. Use a deburring tool to ream the inside edge and smooth the outside edge of both cut ends of the copper pipe. Once smooth, use a clean cloth to thoroughly wipe the ends of the pipes, removing any copper filings, dust, or oils.