![]() There are two methods of designing residential fire sprinkler systems in SJWD’s service area. More information on this topic can be found here: SJWD - Residential Fire Sprinkler Design Requirements Any service that does not meet these requirements is subject to a shut-down lockout until such time as these requirements are met. If a residential fire sprinkler system cannot qualify as a MPP, then SJWD shall require a backflow prevention device to be installed on the water service just downstream of the water meter before a service will be activated or re-activated. Without a fire sprinkler system being designed, constructed, inspected and approved as a MPP, then SJWD may opt to require a retrofit of the system to meet the MPP requirements. Copies of the Jurisdictional Fire Agency’s approved inspection and testing reports shall be submitted to SJWD prior to a water service activation.All residential fire sprinkler systems shall be approved by SJWD and the Jurisdictional Fire Entity/Agency.No third party provided pressures will be allowed. Water system pressures shall be provided to the designer by SJWD’s Engineering Department.There shall not be any dead-end arm-overs or horizontal or vertical pipes longer than 36.0-inches.Water must adequately circulate throughout the fire system piping. There shall not be any dead-end loops or zones in the fire system piping layout. ![]() ![]() All toilets shall be supplied from the fire sprinkler system piping.An MPP system involves designing the fire system piping to the following minimum standards. San Juan Water District standards require that all new residential fire sprinkler systems within its service area are to be based on a Modified Passive Purge (MPP) design. ![]()
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February 2023
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