The priming system has how many parts?

• A. Two
• B. Three
• C. Four
• D. Five

Answer: (B)

Priming a pump relies on three functional parts that work together to remove air and fill the pump with water so it can develop suction. First, the primer device itself creates the vacuum in the pump and suction line. Second, the suction line from the water source (usually with a strainer) carries the water into the system and keeps debris out. Third, a venting or check mechanism allows trapped air to escape and prevents air from re-entering as the line fills, helping to maintain the prime. When all three parts are operating, the pump can be primed effectively and begin drawing water; without any one of them, priming won’t establish or maintain the prime.