NFPA 13D Sprinkler Information Guide - City of Edmonds Fire Marshal OfficeCity of Edmonds Fire Marshal's Office
NFPA 13D FIRE SPRINKLER
INFORMATION GUIDE
PURPOSE
This document provides fire sprinkler designers, installers, plan reviewers, inspectors, and
building owners with important information regarding the requirements for fire sprinkler systems
within the City of Edmonds.
It is intended to provide consistency between all parties during plan design, submittal, review,
installation, inspecting and testing of new and existing fire sprinkler systems.
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The information contained within this document details some of the Edmonds Community and
Development Code (ECDC) amendments. It may also contain some of the provisions found in the
International Fire Code, NFPA Standards, Washington Administrative Code, and the Revised
Code of Washington. This document also outlines recommendations not contained in codes or
standards. Nothing in this document shall prevent the fire code official from modifying these
requirements as necessary, based on circumstances, to provide an acceptable level of protection.
This document is a summary of requirements found in various codes, standards, and laws. It is
not a complete list of permit or code requirements and should not be used as a substitute for
applicable laws and regulations. It is the responsibility of the design and installation professional
to ensure all codes, laws and regulations are followed.
DESIGN AND INSTALLATION
1. When a building is required to be equipped with a fire sprinkler system, the system shall
provide protection throughout the structure or as approved by the fire code official. Partial
area automatic sprinkler systems are prohibited, except where approved by the fire code
official. (ECDC 19.25.035)
2. Residential Systems should be calculated to provide a 10% safety margin and shall
require a system demand of 20 psi residual pressure.
3. All valves (control, drain, etc.) should be readily accessible and reachable without the use
of a ladder.
SOUTH COUNTY FIRE
12425 Meridian Avenue South, Everett, WA 98208 (425) 551-1264 I Prevention@SouthSnoFire.org
SERVING THE CITIES OF • BRIER • EDMONDS • LYNNWOOD • MILL CREEK • MOUNTLAKE TERRACE
4. All plans and calculations shall be stamped with a valid Washington State certificate seal
identifying the appropriate level of competency. (WAC 212-80-018)
5. All systems shall include a main pressure gauge. (ECDC 19.05 B Section R313)
6. The main drain shall be plumbed to the exterior for fire operations and maintenance
purposes unless otherwise approved by the fire code official. (ECDC 19.05 B Section
R313)
7. Sprinkler supply risers shall be connected to the domestic plumbing supply in such a
manner that prevents the sprinkler system from being shut off without turning off the main
domestic water supply. (ECDC 19.05 B Section R313)
8. For flow -through systems, a sink or toilet shall be connected to the sprinkler system with
at least one domestic connection on each floor. (ECDC 19.05 B Section R313)
9. Where fire sprinkler systems are installed, all fueled fired equipment (water heater,
furnace, BBQ, exterior heaters, etc.) shall be protected by a minimum of one (1) sprinkler
head. (ECDC 19.05 B Section R313)
10. In addition to signage required by the NFPA, a red placard with one-half inch (1/2") white
lettering reading "THIS VALVE SHUTS OFF THE DOMESTIC WATER AND FIRE
SPRINKLER SYSTEM" shall be permanently installed at the main supply valve location.
(ECDC 19.05 B Section R313)
11. A red placard with one-half inch (1/2") white lettering reading "DRAIN VALVE" shall be
permanently installed at the drain valve location. (ECDC 19.05 B Section R313)
Revised 06-10-2024
City of Edmonds Fire Marshal's Office — NFPA 13D Sprinkler Guide Page 2 of 2