About every six months, inspect the flexible hoses connecting the steel brake lines with the rear brakes and front calipers for cracks, chafing, leaks, blisters, and other damage. Replacement steel and flexible brake lines are commonly available from dealer parts departments and auto parts stores; only use genuine steel brake lines or approved flexible brake hoses as replacements. When installing the brake line, ensure at least 3/4-inch clearance between the line and any moving or vibrating parts. To disconnect a hose and line, use a flare-nut wrench to loosen the brake line-to-hose fitting, then remove the clip and slide the hose out of the bracket. For disconnecting a hose from a caliper, unscrew the banjo bolt and discard the sealing washers, always installing new sealing washers when reconnecting the hose fitting. Steel brake lines are typically retained with clips; remove these clips completely before removing a rigid brake line and reinstall them or new ones if damaged to provide support and prevent vibration that can lead to breakage. When replacing brake lines, ensure the correct parts are used and never use copper tubing; purchase genuine steel brake lines from a dealer or auto parts store. When installing a steel line, ensure it is securely supported in the brackets with ample clearance from moving or hot components. After installation, check the fluid level in the master cylinder, add fluid as necessary, bleed the brake system, and test the brakes carefully before driving the vehicle in traffic, avoiding operation if there are doubts about the brake system's effectiveness.