The answer to 'how to clean pipe repair' is to thoroughly clean the pipe and surrounding area before making any repairs. This involves using a pipe brush, wire brush, or other cleaning tools to remove any debris, rust, or corrosion from the pipe surface. It's important to ensure the area is completely clean and dry before applying any sealants or patching materials.
Once the pipe is clean, you can assess the extent of the damage and determine if a simple patch or more extensive repairs are needed. For minor leaks or cracks, you may be able to use a pipe repair clamp or epoxy sealant to fix the issue. However, for larger or more complex pipe problems, it's best to call in a professional plumber who can properly diagnose and address the issue.