A valve is at less than 18" of mercury when tested in a vacuum tester. Tech A states that all valves below this value need to replaced. Tech B states that this value may vary based on each shop warranty policy. Who is correct?

Question

Quizplus · Accepted Answer

Tech B is correct because the acceptable vacuum level can vary based on the shop's warranty policy or manufacturer specifications, and not all valves below 18" of mercury necessarily need replacement.

A Valve Is at Less Than 18" of Mercury When