Has anyone installed CPVC piping for an entire fire sprinkler system underground?
We are being asked more and more on one story buildings to install wet systems where our mains are in the corridor and lines are in the walls. This involves a whole lot of drilling of 2x4's and installing a bunch of protective nailer plates (a whole lot of man hours). Seems to me like we could do it faster using a trencher, installing the vast majority of the piping underground with stub ups into the walls for sidewalls. I suppose in order to do this correctly, we would have to install a drain, perhaps by stubbing into a sump pit somewhere? I know I have seen a small amount of CPVC piping installed underground in apartments that have open stairwells between units, and those don't have a way to drain the underground portion, even though this would be after the riser controls and fall under NFPA 13(R). I'm really interested to know if anyone has done it, and/or if there are any big reasons not to. To my knowledge, this isn't specifically addressed in our standards. Thanks, Skyler Bilbo 217-819-6404 Cell
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