In order to prevent any pipe freezing or bursts, it is imperative that sprinkler systems are properly maintained during the winter months. Dry systems are more susceptible to these problems during the winter months
A dry system must be drained after it has been tripped. During sprinkler inspections, technicians drain your systems - but unfortunately, not all of the water, moisture, and condensation can be evacuated from the system upon restoration to normal service. Life Safety Systems, Inc. does not recommend annual sprinkler inspections during the winter because of this factor.
What should maintenance team members do to ensure that winter sprinkler issues don't occur?
Drain your sprinkler drum drips! Low point auxiliary drains are used to collect and remove the additional moisture from the system. They must be drained for a few days after any activation of the dry system to prevent freezing and subsequent damage to the system. This practice should be performed monthly during the spring, summer, and fall. During the winter months, LSS recommends that drum drips be drained often, even on a daily to weekly basis.
The most common low point drain is known as a "drum drip assembly". This type of drain is utilized when volumes of water exceeding 5 gallons are trapped in the piping network.
How to drain your Drum Drip Assembly:
1. Close the upper valve “A” to temporarily isolate the system.
2. Open the lower valve “C” to drain all moisture. (If there is a plug in the bottom of the valve “C”, remove it.)
3. When water/moisture has been drained, close the lower valve “C”.
4. Slowly open the upper valve “A” and allow the water to enter the chamber “B”.
5. Repeat steps 1 through 4 until all the moisture is out.
6. Close the lower valve “C” as tight as possible and/or replace plug “C”. Do not use wrenches or other tools to close the valve. Hand tight should be sufficient.
7. Open the upper valve “A” to allow any additional moisture to enter the chamber “B”. Leave valve “A” open until next draining.
If while draining the system there is a rush of air, then close one of the valves immediately. If too much air escapes, the dry valve will trip and flood the system.