DEKS Dektite Original #3 Silicone roofing boot model DF203RE with 8" base o.d. When the plenum is a sealed space, use the boot on the pipe where it enters the plenum and also at the sprinkler.
On Wed, Oct 18, 2017 at 6:50 AM, AKS-Gmail-IMAP <[email protected]> wrote: > For the situation where the ceiling is a solid composite panel below a > pressurized plenum there is a particular brand of flexible roof boot > designed to handle pipe penetrations at a roof that will work. I do not > have the name off hand. In my area it comes out of Chicago. Imagine a > rubber device that is not unlike the flexible boot for a car’s stick > shifter. Its end that attaches to the roof is large enough to comfortably > fit over the sprinkler. The other end that you cut to size will fit a 1” > pipe. You will have to call to make sure the dimensions work since none of > the manufactures for this type of product post the dimensions and most are > not large enough to fit over the sprinkler. The guy I called actually had > one in his hands, so he could measure its business end while we talked. The > product has a ring for fastening to a metal deck. Apply silicone seal there > and also where the boot grips the 1” pipe. The boot will isolate the > sprinkler from the pressurized plenum. > > Allan Seidel > St. Louis, MO > > > On Oct 17, 2017, at 2:16 PM, Larrimer, Peter A <[email protected]> > wrote: > > Can anyone please assist with a recommendation for a “clean room” > sprinkler where the clean rooms are designed to be negative pressure (for > compounding dangerous drugs). > > The concealed sprinkler cut sheets that I’ve looked at online generally > say that the concealed heads cannot be used in negative pressure rooms > (positive pressure plenums) and this is the type of room design that we > require. The FlexHead cleanroom ceiling sprinkler connection doesn’t > appear to be easy to clean after installation. > > What type of quick response sprinkler could be used in a negative pressure > room that is readily and easily cleanable? Users wanted to used concealed > sprinklers as they thought that the concealed sprinklers would be easy to > wipe down when necessary, but we don’t want to violate the installation > instructions on the cut sheets that state that the concealed sprinklers > can’t be used with positive pressure plenums (negative pressure rooms). > > Thanks in advance. > > Pete Larrimer > VA > > >
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