If a sea valve isolates seawater lines, what is the expected outcome?

• A. Seawater flow to the affected line stops.
• B. Seawater flow increases.
• C. Freshwater is redirected.
• D. Pumps stop automatically.

Answer: (A)

Isolating a sea water line means closing a shutoff valve in the seawater system so water cannot pass beyond that point. When the valve is shut, seawater flow to the affected line stops, which is exactly what you want when you need to stop flow for maintenance or to limit damage. Freshwater and seawater systems are separate, so closing a seawater valve doesn’t automatically redirect freshwater. Pumps may still run, but water won’t reach the isolated branch while the valve remains closed.