antifreze system
antifreze system
(OP)
Do the outlets off a main or branch line have to come off the top of the pipe on a return bend. Or can they come off the side or bottom.
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RE: antifreze system
Travis Mack
MFP Design, LLC
www.mfpdesign.com
RE: antifreze system
Per NFPA 13, 2007 Edition,
8.15.18.2 Return bends shall be connected to the top of branch lines in order to avoid accumulation of sediment in the drop nipples in accordance with Figure 8.15.18.2.
RE: antifreze system
Travis Mack
MFP Design, LLC
www.mfpdesign.com
RE: antifreze system
8.15.18.1 Unless the requirements of 8.15.18.3 or 8.15.18.4 are met, return bends shall be used where pendant sprinklers are supplied from a raw water source, a mill pond, or open top reservoirs.
If you're not taking supply from any of those sources, return bends are not required by NFPA 13.
RE: antifreze system
RE: antifreze system
You only need return bends on dry / preaction systems if you are trying to avoid the expensive dry pendent sprinklers and both the head and the piping are in heated areas.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
RE: antifreze system
Now I remember the job they did that
RE: antifreze system