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Chapter 4
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Design Criteria
4.19 Fire Protection
4.19.1 Links to Standard Plans and Specifications

Standard Specification 7-14: Hydrants
Standard Plan 310a and 310b: Type 310 Hydrant Setting Detail
Standard Plan 311a and 311b: Type 311 Hydrant Setting Detail
Standard Plan 312: Fire Hydrant Marker Layout
Standard Plan 313: Wall Requirements for Hydrants
Standard Plan 314: Fire Hydrant Locations and Clearances

4.19.2 Design Criteria

Hydrant pressure: The Seattle Fire Department  requires that hydrants operate at a minimum residual pressure of 20 psi. Design and construction of fire protection features should comply with Seattle Fire Code and the Standard Plans and Specifications.

Hydrant resets, relocations and adjustments: Any hydrant resets, relocations and/or adjustments will be identified during the design approval process or with construction scheduling. These changes require 4-6 weeks advance notice. Please contact SPU Customer Service at 684-3333.

Fire flow requirements: The Seattle Fire Department and SPU Engineering will authorize all designs impacting fire flow. The following requirements apply, however they are general and should be confirmed with the Fire Department.:

  • Required FF 1000 gpm (single family)
  • Required FF 4000 gpm (commercial)
  • Required FF 8000 gpm (major institution)

Fire hydrant Locations: Fire hydrant locations must conform to Standard Specification 7-14 and Standard Plan 314.

Use of fire hydrants under non-firefighting conditions: Temporary use of a hydrant by private individuals, businesses or organizations will be allowed under certain conditions. To this extent, Seattle Public Utilities will control use of all hydrants within the distribution system.  A temporary water service from the distribution system, for less than six months, may be authorized via a hydrant use permit or hydrant use meter issued by SPU Customer Service.  For information regarding Hydrant Permits please contact the SPU Customer Service.


4.19.3 Design Considerations
  • During survey activities, be sure to note the location of existing hydrants and planned hydrant spacing appropriately.
  • Hydrants should not be placed next to driveways or other private access points where they may impede existing access.
  • Seattle Public Utilities supplies all hydrants. Please contact SPU Customer Service for more information.
  • Changes to fire service including street access during construction require coordination with the Seattle Fire Department.
continue to section 4.20 »   
Latest Online Manual
Detailed Table of Contents
Chapter 4
Design Criteria
4.1 Introduction
4.2 Street Classifications and Street Types
4.3 Design Criteria General Notes
4.4 Grading
4.5 Design Cross Section
4.6 Roadway Width

Roadway Pavement

4.8 Intersections
4.9 Driveways
4.10 Curbs
4.11 Sidewalks
4.12 Crosswalks
4.13 Bicycle Facilities
4.14 Street Trees and Landscape Architectural Standards
4.15 Introduction to Utilities Design Criteria
4.16 Street Lighting
4.17 Street Drainage, Storm Drains and Sewers
4.18 Water Mains
4.19 Fire Protection
4.20 Seattle City Light
4.21 Clearances
4.22 Structures in the Right-of-Way
4.23 Culdesacs and Turnarounds
4.24 Traffic Operations
4.25 Transit Zones
4.26 Street Furniture, Public Art and Unique Objects in the Public Right-of-Way
4.27 Access Easements
4.28 Contact Information
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