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  1. Lamuppet

    Control valve

    Thanks to all of you. In fact, I was sure there was a part of the code that says that the silencing valve on the alarm line on a wet system shall be after the alarm pressure switch, in such a way that you can't silence the pressure switch... May be it's in some part of the CNPI (canadian...
  2. Lamuppet

    Control valve

    First, I want to apologies for my English, it's obviously not my first language. Here's my problem... I think I saw something about that in NFPA 13, but I search and I didn't find... If I'm correct, the control valve (controling for exemple the water motor gong) should be after the pressure...
  3. Lamuppet

    How often does an air compressor typically run?

    I don't know if the client Will like this, but here's a part of the code: NFPA 25 2011 - art. 13.4.4.2.9  Dry pipe systems shall be tested once every 3 years for air leakage, using one of the following test methods: (1) A pressure test at 40 psi (3.2 bar) shall be performed for 2 hours...
  4. Lamuppet

    Overspray protection

    The codes don't statuate about any minimum thickness... "thickness of 0.003 in. (0.076 mm) or less", so as long as I understand well the codes, 0.0012 in is less then 0.003 in... (A "mil" is a thousandth of an inch, so it's not really metric stuff... Ok half half! :P )...
  5. Lamuppet

    Overspray protection

    Cdafd, There's a problem with normal sandwich bag, as explained in the annexes of the NFPA. Paper bag is expensive... The link that I gave in the last post, is much cheaper and meet the specifications asked in the codes... 1.2 mils, equal 0,0012 in, so the thickness is less then the 0,003...
  6. Lamuppet

    Overspray protection

    Check out this: http://www.cellobags.com/Fold_Over_Flat_Cello_Bags_s/145.htm PFB355 should do the trick! Or you could use thin paper bags... As permitted in the NFPA 25 & 13! NFPA 25 2011 art.5.4.1.7.1* Sprinklers subject to overspray accumulations shall be protected using cellophane bags...
  7. Lamuppet

    NFPA25 Building Modification Inspection Failure

    An NFPA 25 inspection is one thing, but a sprinkler system still have to be in accordance with NFPA 13. In exemple if a duct is newly installed, and the sprinkler system isn't correct in accordance with NFPA 13 2010 - 8.5.5.3.1, (Obstruction that prevent sprinker discharge from reaching the...
  8. Lamuppet

    NFPA25 Building Modification Inspection Failure

    http://www.nfpa.org/publicColumn.asp?categoryID=2762&itemID=59789&src=NFPAJournal&cookie%5Ftest=1 There's the link!!
  9. Lamuppet

    Sprinkler systems with high municipal water pressure

    Put a retarding chamber.
  10. Lamuppet

    Swimming Pool as Fire Pump Water Source

    You're right... But the backflow preventer is still a good idea if you want to make sure that the water stay clear.
  11. Lamuppet

    Swimming Pool as Fire Pump Water Source

    My concern is, will the water filled with chlorine or salt cause any permenant damage to the pipes, on a long time basis? And, maybe a backflow preventer would be a good idea. My two cents... ;)

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