What does pep on a brass fitting mean
I think the acronym PEP stands for Phosphoenolpyruvate. It is an enzyme in the lyase family used in the metabolic pathway of gluconeogenesis. It converts oxaloacetate into Phosphoenolpyruvate and carbon dioxide.
P.E.P. are the initials of a company, Plastic Engineered Products that makes all sorts of pipe fittings for the plumbing industry out of plastic and brass.