Service Call Note: Issue: Arrived on-site for boiler maintenance. Action Taken: • Replaced the inner body of the Honeywell zone valve. • Applied Teflon tape and pipe dope to threaded connections to ensure a proper seal. • Installed a cap on the drain leg below the backflow valve. • Purged the boiler and tested all zones to confirm proper system flow. Outcome: No air detected in the system. All zones are operating as expected. No further maintenance required at this time.