Fire Sprinkler

18
Dec/09
0

Fire sprinkler head - how to bleed air / disassemble?

Had to drain my residential water system that has a sprinkler system with common recessed pendant heads. Need to turn water back on. I've seen instructions saying to bleed the air from the highest and farthest sprinkler head in the system. How, exactly, does one do this? Do you remove the head with a wrench? Maybe just loosen it? Or, perhaps, does the deflector turn or unscrew, allowing the stop valve to open partially? I just don't want to screw it up.

Also, I need to hang drywall on a ceiling in an unfinished room that has a pendant head with eschutcheon attached. What is the best practice for accomplishing this?

there should be some kind of test valve at the end of your run of sprinklers. It will be near the last one in the run and should have a pipe going to the outside somewhere or to a drain ....Do not mess with the sprinkler head itself , there will be black icky water in the pipe and it will make a mess. All of the sprinkler systems I have seen have some kind of ball valve or hose bib to bleed or test the system. As for the second question , the trim ring should pull off . Be gentle and don't hit the deflector on the head , then you measure side to side and end to end to find the center of the sprinkler and cut a hole in the drywall , big enough to slip over the sprinkler and still be hidden when the trim ring is put on.

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