Previous plumber needs to learn how to install a NF8 (vacuum breaker) the correct way. Bib started working as it should with no issues once the NF8 was tightened down correctly and the set screw was removed. Still recommend replacing the bib due to the age. Home also needs a 3/4” pp pressure reducing valve, this is required by plumbing code. Emailed copy of invoice and estimates to homeowners email. Applied 10% senior citizens discount to all repair estimates.