I've got a Bed & Breakfast (sprinklered per 13R) that is building a second detached suite which is to likewise be sprinklered to 13R. The existing yard line supplies both the domestic and fire demands for the existing building and the new building is planned to also tap into this yard line.
Question: In determining the fixture units for the new building would we also have to account for the existing building's fixture units when calculating back to the city tap? 13R states: "9.6* Domestic Demand Domestic demand for the building being calculated shall be included as part of the overall system demand for systems with common domestic/fire mains where no provisions are made to prevent thedomestic waterflow upon sprinkler system activation." I think the keywords are "for the building being calculated" and we would not have to account for anything else but I'm also thinking that if the intent is to account for water losses due to domestic usage and we are daisy chaining off of a relatively small, private, water line that it would be wise to account for these losses. Any thoughts? JH
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