You should call a plumber when you encounter issues such as persistent leaks, clogged drains, low water pressure, sewer line backups, water heater problems, or any other plumbing-related emergencies. It's best to seek professional assistance to address these issues promptly and avoid further damage.

The cost to hire a plumber varies depending on factors such as the type of service, location, complexity of the job, and time required. It's recommended to obtain a detailed estimate or discuss pricing with the plumber directly to get an accurate understanding of the costs involved.

You can try to fix minor plumbing problems yourself if you have the necessary knowledge, skills, and tools. However, for complex or major issues, it's generally recommended to hire a professional plumber to ensure proper and safe repairs, preventing further damage or potential hazards.