Anyone who has worked on the technical side of the hydronics industry has used terminology such as: pressure, differential pressure, head and head loss. These terms all have legitimate and specific meanings. But when some of these words get scrambled into jargon, the result can be an undefined or meaningless term. One example of such a scramble is “head pressure.”
To see why the phrase “head pressure” is not a valid technical term, it’s important to understand both words.