In one of my jobs I have a fire sprinkler contractor who claims something that seemed strange to me. I have searched online but didn’t find the code section to show him.
He has laid out his Victaulic piping for two open space office under the beams and when I asked him why he didn't run them up high through the joists and instead only route the pipes underneath the beam where they have to, he responded that for each time that a pipe goes up and down, it requires a drain.
My question is in a wet sprinkler system in an office, do we need to provide drains for every time that a pipe is going few inches down and then back up? Since the entire system is wet and under pressure, are these drains necessary per any code? Whether we do require that or not, can anyone refer me to the pertaining code section?
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