A residential customer reports a mysterious drop in water pressure throughout their entire house, along with a consistently higher water bill. You've checked the water meter and it shows continuous movement even when no water is visibly being used. Which type of leak is most likely occurring?

Question: A residential customer reports a mysterious drop in water pressure throughout their entire house, along with a consistently higher water bill. You've checked the water meter and it shows continuous movement even when no water is visibly being used. Which type of leak is most likely occurring?

Answer options:

• A leaking toilet flapper
• A dripping faucet in the bathroom ✅ A main water service line leak underground
• A leaky hot water tank relief valve

Correct answer: A main water service line leak underground

Explanation: A continuous water meter movement with no visible water use, combined with a drop in pressure throughout the house and a higher water bill, strongly indicates a leak in the main water service line, likely underground. Other leaks tend to be localized or wouldn't cause a systemic pressure drop.