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  1. joecianfarra

    Residential Dry Sidewall application

    re: Residential Dry Sidewall application I just heard news about a new Residential Dry Sidewall, and I can't determine what the best use of this sprinkler would be. The obvious use would be for balconies, however I can't imagine an AJH having a problem with using a QR Dry Sidewall in this...
  2. joecianfarra

    Preaction System with Nitrogen supervision instead of a compressor

    Thanks cdafd, NFPA_13 2007 edition 7.3.2.4.4 Since the nitrogen is for supervision of the piping, I assume LPS supervises for release of gas as well as when it is empty. Plus there are gauges throughout the system. 7.2.6.2.2 Filling the system (~11 gallons) would be the biggest demand on the...
  3. joecianfarra

    Preaction System with Nitrogen supervision instead of a compressor

    I am designing a very small Pre-action System application where the plan is for a single interlocked valve group with electric release and pneumatic pipe supervision. Traditionally I have used a compressor or shop air on rare occasions, however since the piping volume is only 11 gallons I was...

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