A pump emits a pinging sound. What is the most likely cause?

A pump emits a pinging sound. What is the most likely cause?

• A. cavitation
• B. descaling
• C. corrosion
• D. hardness

Answer: (A)

Cavitation. When the liquid pressure at the pump’s suction side falls below its vapor pressure, tiny vapor bubbles form. As those bubbles travel into higher-pressure areas inside the pump, they collapse violently, sending shock waves that sound like a ping. That pinging is a telltale sign of cavitation and can lead to impeller wear and reduced performance if not addressed. Descaling, corrosion, and hardness don’t create this bubble-formation and implosion noise pattern; they cause other issues like flow restrictions, material wear, or mineral buildup, but not the characteristic pinging caused by cavitation. To fix cavitation, improve suction head, reduce flow, or clear inlet restrictions.

Cavitation. When the liquid pressure at the pump’s suction side falls below its vapor pressure, tiny vapor bubbles form. As those bubbles travel into higher-pressure areas inside the pump, they collapse violently, sending shock waves that sound like a ping. That pinging is a telltale sign of cavitation and can lead to impeller wear and reduced performance if not addressed. Descaling, corrosion, and hardness don’t create this bubble-formation and implosion noise pattern; they cause other issues like flow restrictions, material wear, or mineral buildup, but not the characteristic pinging caused by cavitation. To fix cavitation, improve suction head, reduce flow, or clear inlet restrictions.