The answer to 'pipe repair won't flush' is that a clogged or blocked pipe is the most common cause. This can be due to buildup of debris, objects stuck in the pipe, or a more serious issue like a broken or collapsed pipe. Symptoms may include slow draining, gurgling sounds, or complete blockage where water won't flush down the toilet or drain at all.
For minor clogs, you can try using a plunger or drain snake to clear the blockage yourself. However, if the issue persists or you suspect a more serious pipe problem, it's best to call a professional plumber. They have the tools and expertise to properly diagnose and repair the issue, ensuring your pipes are functioning properly again.