Yes, high water pressure can be harmful to your home's plumbing. It can lead to accelerated wear and tear on pipes, joints, and fixtures, causing leaks, burst pipes, and damaged appliances like water heaters and washing machines. High pressure can also lead to noisy plumbing systems, characterized by banging or hammering noises. It's advisable to keep water pressure within a safe range, typically between 40 and 60 pounds per square inch (psi), to prevent damage and extend the life of your plumbing system.