DRY-PIPE PROCEDURES Part 1

I. PREVENTIVE MAINTENANCE:

1. Monthly inspect the main control valve.
i. It should open and close smoothly. Leave fully open.
ii. The monitor switch plunger should be left seated in the valve stem indent.
NOTE: Tamper alarms will sound when the valve is moved from fully open. They will cease when the valve is again fully open.

2. Monthly inspect the monitor switch.
i. Close the control valve 2 turns and verify operations of the appropriate alarms.
ii. Re-open the control valve 2 turns and such that the switch plunger is seated in the indent and verify operation of the cessation of alarms.

3. Monthly inspect all trim valves.
i. Main drain should be closed.
ii. Gauge valves should be open.
iii. Alarm control valve should be open.
iv. Priming water is sufficient in dry pipe valve to seal clapper (approximately 3” above clapper.)
v. Air pump is lubricated and tank drained of condensation if applicable.
vi. Low point drains should be cleared of all condensations.

4. Monthly inspect the Fire Department Connection.
i. Remove caps and verify that the waterway is clean and clear, the clapper swings freely, and the threads are in good condition. Replace caps.
ii. Verify that the ball drip is in working order.
iii. Verify that the check valve is not leaking.

5. Quarterly inspect the sprinklers.
i. Sprinklers should be free from corrosion, foreign materials, paint, and other obstructions to discharge.
ii. Sprinklers should not be bent or damaged in any way.
iii. A complete stock of spare sprinklers and a sprinkler wrench should be available.

6. Semi-annually inspect all the pipe and hangers.
i. Piping and hangers should be in good condition and free from mechanical injury.

The above information is provided as a courtesy and is not intended to replace the outlined procedures as given in NFPA 24. It is the owner’s responsibility to follow the outlined procedures in NFPA 24.


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