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Council told to update building‑permit materials after hydrant flow tests fall below fire‑code standard
Summary
Fire district staff told the council a newly installed hydrant serving a Grafton Road home tested at about 600 gallons per minute, below the International Fire Code 1,000 gpm requirement; staff recommended requiring residential fire suppression systems or a home‑hydrant tank and asked the town to update building‑permit forms and checklists.
Fire district staff asked Rockville officials to revise the town's building‑permit materials after a flow test showed a new hydrant did not meet the International Fire Code's minimum flow for residential structure protection.
The example cited during the meeting involved a new home on Grafton Road built by Chance Wright. Rob, a fire district technical staffer, described the sequence: the builder installed a hydrant on the property to meet the hydrant‑spacing requirement, then requested a flow test. "The flow is about 600 gallons a minute. The requirement for the International Fire Code is that you have to have at least 1,000 gallons a minute," Rob said. Because the supply fell below the code threshold, the district required installation of a suppression system (sprinklers) for the home.
Rob and other staff explained alternatives used where public water or hydrant pressure is inadequate. One option is a residential "home hydrant system," a small holding tank typically in the 100‑ to 500‑gallon range that is metered to the domestic supply and refills only if the sprinkler system activates. Rob described the dynamics in technical terms: "it's not the large requirement of 5,000 gallons, but it does meet the gallon per minute and the duration of a sprinkler system for a residential application," and noted a sprinkler head's expected draw is on the order of about 15 gallons per minute per head.
The discussion also addressed complications when hydrants are tied to private pipeline companies rather than municipal supply. Town members and the fire district said pipeline operators have expressed concern that hydrant tapping could risk depleting culinary shares; staff said any metered arrangement or a dedicated tank can reduce that risk.
Council members asked whether the town should continue to require hydrants in areas served by private water and whether the town's current building‑permit checklist and owner acknowledgements need updating. Staff noted a 2009 town form that applicants historically signed to acknowledge inadequate fire flow; speakers said some contractors later changed and the acknowledgement was not always passed on. The council asked the fire district to provide written guidelines explaining triggers for required sprinkler systems and the home‑hydrant option; staff agreed to provide sample specifications and informational material the town could add to permit checklists.
Ending: Council members agreed the permit application and supporting forms should be updated and asked staff to draft proposed changes and distribute guidance to permit applicants and pipeline companies for review before the town's next formal hearing on code updates.
