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dry pendent on anti-freeze system ??

dry pendent on anti-freeze system ??

dry pendent on anti-freeze system ??

(OP)
The owners mechanical engineer made a comment on my drawings that I needed dry pendents on my antifreeze system in lieu of standard pendents.
This is a small antifreeze system above a ventilated metal ceiling covering a loading dock.
The pendents are on return bends for adjustment purposes.

Before I explain to him how the antifreeze will protect the drop and sprinkler,(Just like it is protecting the rest of the piping above the ceiling) and utilizing a dry pendent won't make a difference, I wanted to make sure there isn't something I am missing here.

Thanks  

RE: dry pendent on anti-freeze system ??

Only the increased costs of the dry pendent and the increased frequency of testing the dry pendent.  I think it is 10 yrs vs 50 yrs with standard sprinklers.

Travis Mack
MFP Design, LLC
 

RE: dry pendent on anti-freeze system ??

He could be concerned that the drops will not be individually drained when the solution is replaced periodically.  If it is small like you implied, I wouldn't think a few drops should matter.

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