HASS (Hydraulic Analyzer of Sprinkler Systems) was developed by mathematicians and registered professional engineers and was first licensed in 1976 as a tool for easy use by engineers, sprinkler contractors and reviewers, and still leads the industry in calculations 30 years later!!!

HASS gives you the tools you need to determine water supply adequacy based on system demand and distribution piping. With HASS, you can perform hydraulic analysis in accordance with NFPA 13, 13D, 13R, 14, 15, 20, 24, 750 and other standards, calculating any connection of nodes and pipes. And you receive major revisions at least annually; improvements or new features at no extra charge for the duration of the license period.

Hazen-Williams Calculation Method
Hazen-Williams is used for sprinkler systems (grids, trees, and loops), water spray fixed systems, standpipe systems, yard main (hydrant) systems, AFFF systems, and any other flow of water through pipes under pressure .
Darcy-Weisbach Calculation Method
Darcy-Weisbach is used where specified (e.g. antifreeze systems, water-mist systems, flow of foam concentrate and other liquids)

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