[Sprinklerforum] Re: System piping installed on top of a roof

I seriously doubt the building code will allow you to install anything on a roof without anchoring it down, no matter what the owner wants. You better not be in a hurricane or tornado prone area. Hurricane wind resistance is 140 mph in many cases. David L. Miller, P.E. Engineered Fire Protectio

[Sprinklerforum] System piping installed on top of a roof

I have a situation in which I need to install piping on top of the roof of a building, but I need to do so without also penetrating the roof deck. The roof will support the system piping, structurally speaking, but I cannot penetrate the roof membrane due to the owner being concerned about moist

[Sprinklerforum] Skylights

We have a project that is a warehouse building protected with ESFR sprinkler heads, the warehouse area has 6'x6' skylights spaces about 50' apart. The skylights is only about 8" above the metal deck of the warehouse ceiling. The ESFR heads are spaced 10'x10' with the skylight directly in the mid

[Sprinklerforum] Re: [EXTERNAL] Re: help

What I think you should do is adjust/select the PRV to provide a maximum static outlet pressure of 175-psi based on whatever the maximum static inlet pressure is. See the Zurn static pressure chart. This is correct. Setting should be based on maximum static condition. Then use the 250-gpm flow

[Sprinklerforum] Re: Older dry pipe sprinkler systems

Anthony, Thank you. Regards, G. Tim Stone G. Tim Stone Consulting, LLC NICET Level III Engineering Technician Fire Protection Sprinkler Design and Consulting Services 117 Old Stage Rd. - Essex Jct., VT. 05452 CELL: (802) 373-0638

[Sprinklerforum] Re: Older dry pipe sprinkler systems

NFPA 25-2020 [cid:image001.png@01D97D96.8102C8B0] From: tston...@comcast.net Sent: Wednesday, May 3, 2023 7:57 AM To: sprinklerforum@lists.firesprinkler.org Subject: [Sprinklerforum] Older dry pipe sprinkler systems Is there an acceptable leakage rate for an existing dry pipe system? A renovati

[Sprinklerforum] Re: Older dry pipe sprinkler systems

You are. 13 states no leakage on hydrostatic test. 25 report leaks as deficiencies. Sometimes even Red Tag level as seen in tagging examples. At least as much as I can recall.. R/ Matt Please rate our customer service

[Sprinklerforum] Older dry pipe sprinkler systems

Is there an acceptable leakage rate for an existing dry pipe system? A renovation of an (20 - 30 years) existing system was done to replace leaky piping, perform 200 PSI water pressure testing and installation of a Nitrogen generator. This was done 2 years ago and some new leakage has started.