🔍 Key Concepts

• Static suction lift vs. static suction head (what changes when the source is below vs. above the pump) • The reference line of a pump is usually the centerline of the pump • Static conditions mean no flow, just elevation difference

💭 Think About

• Ask yourself: when people say a pump is ‘lifting’ liquid, is the source of the liquid above or below the pump? • Which side of the pump (suction or discharge) are we concerned with for suction lift? • Which answer talks about the elevation difference between the pump’s centerline and the liquid level on the suction side when the pump must pull liquid up to it?

✅ Before You Answer

• Focus on suction side only, not discharge side • Look for the phrase that clearly implies the liquid source is below the pump and must be lifted up • Make sure the definition uses the pump centerline as the reference point for measuring elevation difference