Step1: Shut off the water supply and allow the equipment to cool completely before servicing.
Step2: Relieve all system pressure to prevent accidental discharge during installation.
Step3: Remove the old vacuum breaker using an adjustable wrench while supporting connected piping.
Step4: Apply approved thread sealant to the new vacuum breaker threads.
Step5: Thread the new vacuum breaker into the fitting and tighten securely without overtightening.
Step6: Restore supply pressure and inspect carefully for leaks, proper venting, and safe operation.