Install New Self-Draining Vacuum Breaker

What happens here

Introduce the new replacement part: an Arrowhead PK-1390 fine thread self-draining vacuum breaker. This new vacuum breaker comes with a small set screw, which the presenter strongly advises against installing. The reason for this caution is that if the set screw is installed and then breaks off, it will become extremely difficult to remove the vacuum breaker in the future. Crucially, the new vacuum breaker also includes a washer, which must be properly seated inside the fitting to ensure a watertight seal. Once the threads are clean and the washer is in place, simply hand-thread the new vacuum breaker onto the hose bib. Tighten it only until it is hand-tight; no tools are necessary for this step.

Goal: Securely attach the replacement vacuum breaker to the hose bib