What is the term for the process of filling a piping system from the lowest point, using high-point vents to release air and closing vents when water fully fills the system?

What is the term for the process of filling a piping system from the lowest point, using high-point vents to release air and closing vents when water fully fills the system?

• A. Filling
• B. Venting
• C. Priming
• D. Purging

Answer: (A)

The main idea here is loading a piping network with water from the lowest point while letting trapped air escape through high-point vents until the system is completely full. Opening the vents at the high points lets air rise and escape as water fills in, and then you close those vents once water reaches them so no air pockets remain. This combination of introducing liquid and removing air defines the filling process. If you only talked about removing air, you’d be describing venting; if you were preparing a pump to start, you’d call it priming; and purging would emphasize flushing out air or gases and sometimes replacing them with water, but not capture the full act of filling the entire system. Filling best fits the overall operation described.

The main idea here is loading a piping network with water from the lowest point while letting trapped air escape through high-point vents until the system is completely full. Opening the vents at the high points lets air rise and escape as water fills in, and then you close those vents once water reaches them so no air pockets remain. This combination of introducing liquid and removing air defines the filling process.

If you only talked about removing air, you’d be describing venting; if you were preparing a pump to start, you’d call it priming; and purging would emphasize flushing out air or gases and sometimes replacing them with water, but not capture the full act of filling the entire system. Filling best fits the overall operation described.