Which are basic steps in a weekly inspection of a wet-pipe system?

• A. Inspect only the visible exterior
• B. Check that all visible gauges are within normal readings, ensure no leakage, verify valve positions, and confirm no obstructions
• C. Refill the system with water
• D. Test only the alarms

Answer: (B)

Weekly inspections of a wet-pipe system are about confirming readiness by checking the indicators and physical conditions that affect operation. Look at the visible gauges to verify the water-filled system is pressurized within normal readings and to detect any abnormal pressure trends. Inspect for any leakage along joints, valves, or piping, because even small drips can indicate developing problems that could compromise performance. Verify valve positions—especially the main control valve and other isolating/zone valves—to ensure they are in the correct status for service and can be opened or closed as needed during maintenance. Finally, confirm there are no obstructions near sprinkler heads or in the piping that could block water distribution or drainage, since obstructions can prevent proper release of water when a sprinkler head is activated.

This scope is why the other options aren’t sufficient for a weekly check: limiting the inspection to the exterior misses internal indicators like gauges, leaks, and valve status; refilling the system isn’t a routine weekly task and can alter system conditions; and testing only the alarms doesn’t verify the essential readiness of the water-filled piping and flow paths.