When a fire occurs, individual sprinklers are actuated by the heat and water flows immediately. The wet pipe system employs automatic sprinklers attached to piping containing water under pressure at all times.

Combination Fire Standpipe and Sprinkler.

There are five basic automatic fire sprinkler systems: IвЂ™ve also provided a list of the applicable design standards for these systems. WeвЂ™ll take a look at the types of systems available and the applications for each. Should you have any questions or need further information please do not hesitate to contact SJWDвЂ™s Engineering Department.Hello! Steve Rios, back again with information about automatic fire sprinkler systems.

Sacramento Metropolitan Fire Department.

There are four fire entities/agencies having jurisdiction within SJWDвЂ™s service area. A copy of the вЂњApplication for Flow and/or Pressure AnalysisвЂќ form can be referenced here: SJWD - Residential Fire Service Design Procedure SJWD - Application for Flow or Pressure Analysis A copy of the design procedure for this methodology can be referenced below. The current fee for this service can be found on SJWDвЂ™s current fee schedule. An application for a flow and pressure analysis is submitted to SJWD along with a fee payment for this service. This design method begins with contacting SJWD and requesting a site specific Flow and Pressure analysis. Typically this methodology is used when a site specific pressure is needed to complete a fire sprinkler system design, such as for a larger custom home or where there are unusual site conditions or other constraints. Method B вЂ“ Design Based on a Flow and Pressure Analysis. A copy of the design procedure for this methodology can be referenced here: SJWD - Residential Fire Sprinkler Standard Pressure Design Procedure The process involves contacting SJWDвЂ™s Engineering Depa rtment and requesting a вЂњStandard PressureвЂќ for a given parcel or location. Typically this methodology is used when the fire system can be based on a standard pressure of either 35-psi or 45-psi (based on the site specific location within SJWDвЂ™s service area). Method A вЂ“ Design Based on a Standardized Pressure.

There are two methods of designing residential fire sprinkler systems in SJWDвЂ™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 aВ 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 AgencyвЂ™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 SJWDвЂ™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.

Fire sprinkler system design