Brennan Doherty

Brennan Doherty is the national specifications manager for MIFAB HydroMax. He helped introduce siphonic roof drainage into the newest ASPE Plumbing Engineer Design Handbook V2. In his role, Doherty is responsible for educating engineers across the country on the benefits of siphonic roof drainage and the codes that govern them. For more information, contact HydroMax@MIFAB.com.

Siphonic drains reduce pipe diameters and help avoid excavation

Eliminating long runs.

Brennan Doherty

April 24, 2019

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Gravity often dictates storm drainage design. Pipe can only run so far with pitch before crossing over into livable space. At times, it requires a leader to drop down in the middle of the building, with the only solution being to excavate a long distance — still accounting for pitch — through the interior to reach the civils.

Jurisdictions are adopting the International Building Code 2018 edition and the 2018 edition of NFPA 101: Life Safety Code that adopt the 2016 edition if NFPA 13 by reference. This program will address technical changes specific to corrosion and air vents for the 2016 edition of NFPA 13. A task group concluded that venting the trapped air in a wet system can decrease water delivery time, reduce alarm ring delay, reduce water flow alarm cyclic ringing, and reduce corrosion activity.

Brennan Doherty

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Siphonic drains reduce pipe diameters and help avoid excavation

PM Engineer Magazine

2020 March