HomeMy WebLinkAboutChapter 05F Plumbing Code
CHAPTER 5F
PLUMBING CODE*
* Editor’s Notes:
1. Pursuant to section 107-28, Hawai‘i Revised Statutes (“HRS”), each County shall amend and adopt the Hawai‘i State building codes
and standards listed in HRS, section 107-25 within two years after adoption by the State Building Code council. If a County does not
amend, adopt, and update a State code within this time frame, the respective State code shall become applicable as an interim County
code.
2. Chapter 17, “plumbing code,” was repealed by ordinance 20-61, section 12, and replaced with chapter 5F.
Article 1. General Provisions.
Section 5F-1-1. Title.
Section 5F-1-2. Purpose.
Section 5F-1-3. Scope; exceptions.
Section 5F-1-4. Administrative provisions.
Section 5F-1-5. Existing plumbing installations.
Section 5F-1-6. Definitions.
Section 5F-1-7. Compliance required.
Section 5F-1-8. Conflict.
Article 2. Installation Requirements.
Section 5F-2-1. Uniform plumbing code adopted.
Article 3. Plumbing Work Within Special Flood Hazard Areas.
Section 5F-3-1. General applicability.
Section 5F-3-2. Definitions.
Section 5F-3-3. Drainage (plumbing) systems.
Section 5F-3-4. Private sewage disposal/treatment.
Section 5F-3-5. Water supply systems.
Section 5F-3-6. Plumbing piping under buildings.
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P LUMBING C ODE § 5F-1-1
CHAPTER5F
PLUMBING CODE*
* Editor’s Notes:
1. Pursuant to section 107-28, Hawai‘i Revised Statutes (“HRS”), each County shall amend and adopt the Hawai‘i State building codes
and standards listed in HRS, section 107-25 within two years after adoption by the State Building Code council. If a County does not
amend, adopt, and update a State code within this time frame, the respective State code shall become applicable as an interim County
code.
2. Chapter 17, “plumbing code,” was repealed by ordinance 20-61, section 12, and replaced with chapter 5F.
Article 1. General Provisions.
Section 5F-1-1. Title.
This chapter shall be known as the “plumbing code.”
(2020, ord 20-61, sec 6.) 5F-1-1
Section 5F-1-2. Purpose.
The purpose of this chapter is to provide for the protection of the public health and
safety by establishing minimum standards for the installation, alteration, or repair of
plumbing, gas, and drainage systems and the inspection thereof in the County.
(2020, ord 20-61, sec 6.) 5F-1-2
Section 5F-1-3. Scope; exceptions.
This chapter shall apply to all new construction, relocated buildings, and to any
alterations, repairs, or reconstruction within the property lines of the premises, within
the County inland of the shoreline high-water line. Exceptions to these minimum
requirements are listed below:
This chapter shall not apply to:
(1) Work or installations not covered by the Uniform Plumbing Code, 2012
Edition, as adopted by the Hawai‘i State Plumbing Code;
(2) Work on buildings or premises owned by or under the direct control of the
Federal government;
(3) Work in public State or County road right-of-ways for utility installations and
mechanical equipment not specifically regulated in this code where installed:
(A) Outside the proposed premises or boundary lines in a subdivision under
development; or
(B) In an approved subdivision, where the work is in planned or actual
roadways or other common infrastructure areas;
(4) Pursuant to section 448E-13, Hawai‘i Revised Statutes, work by employees of
a public utility within the State under a franchise or charter granted by the
State which is regulated by the public utilities commission and community
antennae television company, while so employed;
(5) Plumbing work related to work regulated by chapter 397, Hawai‘i Revised
Statutes, relating to boilers and pressure vessels; or
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(6) Agricultural buildings, structures, and appurtenances without electrical power
and plumbing systems are exempt from permit and construction code
requirements, pursuant to section 46-88, Hawai‘i Revised Statutes, except as
otherwise provided for in this construction code. No plumbing systems shall
be connected to a building or structure without first obtaining a permit for
plumbing work.
(2020, ord 20-61, sec 6.) 5F-1-3
Section 5F-1-4. Administrative provisions.
Provisions relating to permitting, enforcement, inspection, and other
administrative procedures pertaining to this chapter are contained in chapter 5, the
construction administrative code.
(2020, ord 20-61, sec 6.) 5F-1-4
Section 5F-1-5. Existing plumbing installations.
Plumbing installations in existence and permitted pursuant to applicable laws and
standards in effect when the plumbing work thereon was performed, shall not be
deemed to be in violation of subsequent changes to applicable laws or standards,
provided that such installations shall be subject to the provisions of section 5-2-3 of the
construction administrative code.
(2020, ord 20-61, sec 6.) 5F-1-5
Section 5F-1-6. Definitions.
As used in this chapter, unless it is apparent from the context that a different
meaning is intended:
2
“Accessory structure” means a structure not greater than 3,000 square feet (279 m)
in floor area, and not over two stories in height, the use of which is customarily
accessory to and incidental to that of the dwelling and which is located on the same lot.
“Authority having jurisdiction” means the director of the department of public
works, or the director’s authorized representative.
“Building” means any structure used or intended for supporting or sheltering any
use or occupancy. The term shall include but not be limited to, any structure mounted
on wheels such as a trailer, wagon, or vehicle which is parked and stationary for any
24-hour period, and is used for business or living purposes; provided, however, that the
term shall not include a push cart or push wagon which is readily movable and which
does not exceed 25 square feet in area, nor shall the term include a trailer or vehicle,
used exclusively for the purpose of selling any commercial product therefrom, which
hold a vehicle license and actually travels on public or private streets.
“Certified medical gas installer” means a qualified installer who has successfully
passed a National Inspection Testing Certification Service competency examination in
accordance with the ASSE Series 6000 Standard, section 6010.
“Certified medical gas verifier” means a qualified installer who has successfully
passed a National Inspection Testing Certification Service competency examination in
accordance with the ASSE Series 6000 Standard, Section 6030.
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P LUMBING C ODE § 5F-1-6
“This code” means the plumbing code, contained in chapter 5F, or the construction
administrative code, contained in chapter 5, or both, as the context requires.
“Construction code” means collectively: chapter 5, the construction administrative
code; chapter 5A, the building code; chapter 5B, the residential building code; chapter
5C, the existing building code; chapter 5D, the electrical code; chapter 5E, the energy
conservation code; chapter 5F, the plumbing code; and all administrative rules adopted
pursuant to these chapters.
“Director” means the director of public works of the County of Hawai‘i or the
director’s duly authorized representative.
“Dwelling” means any building that contains one or two dwelling units used,
intended, or designed to be built, used, rented, leased, let or hired out to be occupied, or
that are occupied for living purposes.
“Dwelling unit” means a single unit providing complete independent living facilities
for one or more persons, including permanent provisions for living, sleeping, eating,
cooking, and sanitation.
“Engineer” means a person who is licensed and in good standing as a professional
engineer in the State of Hawai‘i.
“Existing building” means a building erected prior to the effective date of this
chapter, or one for which a legal permit has been issued.
“Existing structure” means a structure erected prior to the effective date of this
chapter, or one for which a legal permit has been issued.
“IAPMO” means the International Association of Plumbing and Mechanical
Officials.
“Permit” means a formal authorization issued by the authority having jurisdiction
that authorizes performance of specified work, pursuant to the construction code,
including the following chapters and all administrative rules adopted pursuant to the
following chapters:
(1) 5, the construction administrative code;
(2) 5A, the building code;
(3) 5B, the residential building code;
(4) 5C, the existing building code;
(5) 5D, the electrical code;
(6) 5E, the energy conservation code; and
(7) 5F, the plumbing code.
“Person” means any individual, firm, partnership, association, or corporation, or its
or their successors or assigns, according to the context thereof.
“Plumbing work” means the design, installation, alteration, construction,
reconstruction, or repair of plumbing, gas, and drainage systems.
“Section” means a section of a chapter of the Uniform Plumbing Code.
“UPC” means the Uniform Plumbing Code as published by the International
Association of Plumbing and Mechanical Officials.
(2020, ord 20-61, sec 6; am 2021, ord 21-61, secs 24 and 25.) 5F-1-6
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Section 5F-1-7. Compliance required.
(a) No person shall perform or cause to be performed any plumbing work which does
not comply with the provisions of this code or any permit issued pursuant to this
code.
(b) No person shall perform any work covered by this code in violation of the provisions
of chapter 448E, Hawai‘i Revised Statutes.
(c) Any approval or permit issued pursuant to the provisions of this code shall comply
with all applicable requirements of this code.
(d) The granting of a permit, variance, or approval of plans or specifications pursuant
to this code does not dispense with the necessity to comply with any applicable law
to which a permit holder may also be subject.
(2020, ord 20-61, sec 6.) 5F-1-7
Section 5F-1-8. Conflict.
(a) If any provisions of this code conflict with or contravene provisions of the Hawai‘i
State Plumbing Code or the Uniform Plumbing Code that have been incorporated
by reference, the provisions of this code shall prevail as to all matters and questions
arising out of the subject matter of such provisions.
(b) In situations where two or more provisions of this code and any applicable law,
other than those provided for in subsection (a), cover the same subject matter, the
stricter shall be complied with.
(2020, ord 20-61, sec 6.) 5F-1-8
Article 2. Installation Requirements.
Section 5F-2-1. Uniform plumbing code adopted.
The Uniform Plumbing Code, 2012 Edition, published by the International
Association of Plumbing and Mechanical Officials, 5001 E. Philadelphia Street, Ontario,
CA 91761-2816, including appendices, is incorporated by reference and made a part of
this code, subject to any amendments hereinafter set forth in this chapter.
(a) The scope, technical specifications, and exemptions set forth in the Uniform
Plumbing Code, 2012 Edition, are hereby adopted as the standard for plumbing
work covered by this code, provided there are no specific provisions in any other
section of this code covering the particular matter.
(b) A copy of the Uniform Plumbing Code, 2012 Edition, shall be available for public
inspection at the Hilo and Kailua-Kona offices of the department of public works
and at the office of the County clerk.
(c) This incorporation by reference includes all parts of the Uniform Plumbing Code,
2012 Edition, subject to the amendments hereinafter set forth.
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P LUMBING C ODE § 5F-2-1
(1) Section 204.0 of the Uniform Plumbing Code is amended by amending the
definition of “Building Drain” to read as follows:
“BUILDING DRAIN. That part of the lowest piping of a drainage
system that receives the discharge from soil, waste, and other
drainage pipes inside the walls of buildings and conveys it to the
building sewer beginning five (5) feet (1524 mm) outside the building
wall.”
(2) Section 210.0 of the Uniform Plumbing Code is amended by adding a new
definition of “Health Officer” to read as follows:
“HEALTH OFFICER. Health Officer shall mean the director of health
of the department of health, State of Hawai‘i, or the director’s
authorized agent.”
(3) Section 221.0 of the Uniform Plumbing Code is amended by adding a new
definition of “Single Stack Vent System” to read as follows:
“SINGLE STACK VENT SYSTEM. A specially designed plumbing
system wherein a common stack serves as a drainage pipe as well as a
vent pipe.”
(4) A new subsection 313.8 is added to the Uniform Plumbing Code to read as
follows:
“313.8 Seismic Supports. Where earthquake load are applicable in
accordance with the building code, plumbing piping supports shall be
designed and installed for the seismic forces in accordance with the
building code.”
(5) Subsection 402.5 of the Uniform Plumbing Code is amended to read as follows:
“402.5 Setting. Fixtures shall be set level and in proper alignment
with reference to adjacent walls. No water closet or bidet shall be set
closer than 15 inches (381 mm) from its center to a side wall or
obstruction nor closer than 30 inches (762 mm) center to center to a
similar fixture. The clear space in front of any water closet, bidet, and
lavatory, shall not be less than 24 inches (610mm) which may include
adjoining floor area.”
(6) Section 422.0 and Table 422.1 of the Uniform Plumbing Code are repealed in
their entirety.
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§ 5F-2-1 H AWAI‘I C OUNTY C ODE
(7) The Uniform Plumbing Code is amended by adding a new section 422.0 to read
as follows:
“422.0 Minimum Number of Required Fixtures. Plumbing
fixtures shall be provided for the type of building occupancy and in the
minimum number required in Chapter 29 of the International
Building Code.”
(8) Subsection 507.13 of the Uniform Plumbing Code is amended by adding the
following Exception to the end thereof, to read as follows:
“Exception:
(1) Water heaters may be installed at floor level in carports
having one hundred (100) percent opening on one side and
fifty (50) percent net opening on another side or the
equivalent of such openings on two or more sides, provided
the adjacent ground level is at or below the flow level of the
carport.
(2) Fuel burning water heaters having sealed combustion
chambers may be installed at floor level.
(3) Electric water heaters in garages may be installed at floor
level.”
(9) A new subsection 508.4.5 is added to the Uniform Plumbing Code to read as
follows:
“508.4.5 Access. Every attic, mezzanine, or platform more than 16
feet (4.9 meters) above the ground floor level shall be accessible by a
stairway or ladder permanently fastened to the building.
Exception: No permanent access required for R-3 Occupancies.”
(10) Subsection 604.11 of the Uniform Plumbing Code is amended to read as
follows:
“604.11 Lead Content. The maximum allowable lead content in
pipes, pipe fittings, plumbing fittings, and fixtures intended to convey
or dispense water for human consumption shall be not more than a
weighted average of 0.25 percent with respect to the wetted surfaces of
pipes, pipe fittings, plumbing fittings, and fixtures. For solder and
flux, the lead content shall be not more than 0.2 percent where used in
piping systems that convey or dispense water for human consumption.
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P LUMBING C ODE § 5F-2-1
Exceptions:
(1) Pipes, pipe fittings, plumbing fittings, fixtures or backflow
preventers used for nonpotable services such as
manufacturing, industrial processing, irrigation, outdoor
watering, or any other uses where the water is not used for
human consumption.
(2) Water closets, bidets, urinals, fill valves, flushometer valves,
tub fillers, shower valves, service saddles, or water
distribution main gate valves that are 2 inches (50 mm) in
diameter or larger.”
(11) Subsection 608.3 of the Uniform Plumbing Code is amended by adding a third
sentence to the first paragraph to read as follows:
“Cylinder Expansion Tanks more than twenty-four (24) inches in
vertical height, shall be secured against seismic movements within the
upper top one third (1/3) of its vertical dimensions.”
(12) Subsection 608.5 of the Uniform Plumbing Code is amended to read as follows:
“608.5 Drains. Relief valves shall be provided with a drain, not
smaller than the relief valve outlet, of galvanized steel, hard-drawn
copper piping and fittings, CPVC, PP, or listed relief valve drain tube
with fittings that will not reduce the internal bore of the pipe or
tubing (straight lengths as opposed to coils) and shall extend from the
valve to the outside of the building, with the end of the pipe not more
than 2 feet (610 mm) nor less than 6 inches (152 mm) aboveground or
the flood level of the area receiving the discharge and pointing
downward. Such drains shall be permitted to terminate at other
approved locations. Relief valve drains shall not terminate in a
building’s crawl space. No part of such drain pipe shall be trapped or
subject to freezing. The terminal end of the drain pipe shall not be
threaded.”
(13) Subsection 715.1 of the Uniform Plumbing Code is amended to read as follows:
“715.1 Materials. The building sewer, beginning 5 feet (1524 mm)
from a building or structure shall be of such materials as prescribed in
this code.”
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§ 5F-2-1 H AWAI‘I C OUNTY C ODE
(14) A new subsection 911.3 is added to the Uniform Plumbing Code to read as
follows:
“911.3 Single Stack System. When approved by the administrative
authority, a single-stack system based on engineered studies and tests
may be used in lieu of other related provisions in this code. Plans and
specifications of such systems shall be prepared and stamped by a
Hawaii licensed mechanical engineer.”
(15) Subsection 1101.11.1 of the Uniform Plumbing Code is amended to read as
follows:
“1101.11.1 Primary Roof Drainage. Roof areas of a building shall
be drained by roof drains or gutters. The location and sizing of drains
and gutters shall be coordinated with the structural design and pitch
of the roof. Unless otherwise required by the authority having
jurisdiction, roof drains, gutters, vertical conductors or leaders, and
horizontal storm drains for primary drainage shall be sized based on a
storm of 60 minutes duration and 100 year return period. Refer to the
National Weather Service rainfall map for 100 year, 60 minute storms
at various locations.”
(16) Subsection 1211.5 of the Uniform Plumbing Code is amended by adding a
third sentence to read as follows:
“Ground-joint unions may only be used at exposed fixture, appliance,
or equipment connections and in exposed exterior locations
immediately on the discharge side of a building shutoff valve. Heavy
duty flanged type unions may be used in special cases, when first
approved by the administrative authority. Bushings shall not be used
in concealed locations.”
(17) A new subsection 1212.2 is added to the Uniform Plumbing Code to read as
follows:
“1212.2 Anchored or strapped. Liquified Petroleum Gas Cylinder
Tank Facilities more than 24 inches in vertical height, shall be
secured against seismic movements within upper top-third (1/3) of its
vertical dimensions.”
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P LUMBING C ODE § 5F-2-1
(18) A new subsection 1301.4 is added to the Uniform Plumbing Code to read as
follows:
“1301.4 The provisions of ‘Part 1 - Special Requirements for Health
Care Facilities’ shall be for REFERENCE ONLY, FOR DESIGN AND
CONSTRUCTION. This section will not be regulated or enforced by
the County of Hawai‘i.”
(19) Subsection 1309.1 of the Uniform Plumbing Code is amended to read as
follows:
“1309.1 General. The provisions of ‘Part II - Medical Gas and
Vacuum Systems’ shall be for REFERENCE ONLY, FOR DESIGN
AND CONSTRUCTION. This section will not be regulated or enforced
by the County of Hawai‘i. Installation of medical gas and vacuum
piping shall be conducted by qualified Medical Gas Installers meeting
the requirements of ASSE 6010. Testing and verification shall be
conducted by ‘Certified Medical Gas System Verifier’ in accordance
with ASSE 6030.”
(20) Section 1326.0 of the Uniform Plumbing Code is amended by replacing
“Authority Having Jurisdiction” with “Certified Medical Gas Verifier”
throughout subsections 1326.1 through 1326.15.
(21) Subsection 1327.3 of the Uniform Plumbing Code is amended to read as
follows:
“1327.3 Reports. The inspection and testing reports shall be
submitted directly to the party that contracted for the testing, who
shall submit the report through channels to the responsible facility
authority and others that are required.
Reports shall contain detailed listings of findings and results.
The licensed mechanical engineer responsible for the design and
observation of the system shall provide a statement that the
certification tests of section 1326.0 as applicable, have been verified
and to the best of such engineer's knowledge complies with the
installation requirements.”
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§ 5F-2-1 H AWAI‘I C OUNTY C ODE
(22) Table 1401.1 of the Uniform Plumbing Code is amended by adding the
following standards to be inserted between Standard Number SAE-J1670-2008
and TCNA A118-10-2011:
Referenced
Standard Number Standard Title Application
Sections
State of Hawai‘i - Standard Details for Public
Various Various
Rev. Sept. 2000 Works Construction
State of Hawai‘i –
Water System Standards Various Various
2002
(23) Subsection 1601.3 of the Uniform Plumbing Code is amended to read as
follows:
“1601.3 Permit or Approval.
It shall be unlawful for any person to construct, install, alter, or cause
to be constructed, installed, or altered any alternate water source
system in a building or on a premises without first obtaining a permit
or approval to do such work from the Authority Having Jurisdiction.
Exceptions:
(1) A permit is not required for exterior rainwater catchment
systems used for outdoor drip and subsurface irrigation with
a maximum storage capacity of 360 gallons (1363 L).
(2) A plumbing permit is not required for rainwater catchment
systems for single family dwellings where outlets, piping, and
system components are located on the exterior of the
building. This does not exempt the need for permits where
required for electrical connections, tank supports, or
enclosures.”
(24) Subsection 1602.7 of the Uniform Plumbing Code amended by amending the
first paragraph to read as follows:
“1602.7 Drawings and Specifications. The Authority Having
Jurisdiction shall require the following information to be included
with or in the plot plan before a permit or approval is issued for a gray
water system, or at a time during the construction thereof:”
(25) Appendix D of the Uniform Plumbing Code, “Sizing Storm Water Drainage
Systems,” is deleted in its entirety.
(26) Appendix E of the Uniform Plumbing Code, “Manufactured/Mobile Home
Parks and Recreational Vehicle Parks,” is deleted in its entirety.
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P LUMBING C ODE § 5F-2-1
(27) Appendix F of the Uniform Plumbing Code, “Firefighter Breathing Air
Replenishment Systems,” is deleted in its entirety.
(28) Appendix G of the Uniform Plumbing Code is amended by amending its title to
read as follows:
“APPENDIX G
SIZING OF VENTING SYSTEMS SERVING APPLIANCES EQUIPPED
WITH DRAFT HOODS, CATEGORY I APPLIANCES, AND APPLIANCES
LISTED FOR USE WITH TYPE B VENTS
FOR REFERENCE ONLY
(The content of this Appendix is based on Annex G of NFPA 54)”
(29) Appendix H of the Uniform Plumbing Code, “Private Sewage Disposal
Systems,” is amended by amending its title to read as follows:
“APPENDIX H
COMMERCIAL OR INDUSTRIAL SPECIAL LIQUID WASTE DISPOSAL
FOR REFERENCE ONLY”
(2020, ord 20-61, sec 6.) 5F-2-1
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§ 5F-3-1 H AWAI‘I C OUNTY C ODE
Article 3. Plumbing Work Within Special Flood Hazard Areas.
Section 5F-3-1. General applicability.
(a) The provisions of this article shall apply to the: installation of any new plumbing
system; or the renovation and major alteration, addition, or reinstallation of any
existing plumbing system within a special flood hazard area as identified by
chapter 27, Hawai‘i County Code. All installations shall comply with chapter 27,
Floodplain Management.
(b) The provisions of this article shall not apply to the following:
(1) Any plumbing system serving a building or structure exempted from chapter
27;
(2) Any plumbing system serving a building or structure which has been granted
a flood control variance pursuant to article 2, chapter 27; or
(3) Any plumbing system lawfully existing prior to November 8, 1993, subject to
the provisions of chapter 27.
(2020, ord 20-61, sec 6.) 5F-3-1
Section 5F-3-2. Definitions.
As used in this article, unless it is apparent from the context that a different
meaning is intended:
“Base flood elevation” means the water surface elevation of the base flood.
“Flood or flooding” means:
(1) A general and temporary condition of partial or complete inundation of
normally dry land areas from:
(A) The overflow of inland or tidal waters;
(B) The unusual and rapid accumulation or runoff of surface waters from any
source; or
(C) Mudslides (i.e., mudflows) which are approximately caused by flooding as
defined in paragraph (1)(B) of this definition and are akin to a river of
liquid and flowing mud on the surfaces of normally dry land areas, as
when earth is carried by a current of water and deposited along the path
of the current; or
(2) The collapse or subsidence of land along the shore of a lake or other body of
water as a result of erosion or undermining caused by waves or currents of
water exceeding anticipated cyclical levels or suddenly caused by an unusually
high water level in a natural body of water, accompanied by a severe storm, or
by an unanticipated force of nature, such as flash flood or an abnormal tidal
surge, or by some similarly unusual and unforeseeable event which results in
flooding as defined in paragraph (1)(A) of this definition.
“Special flood hazard area” means an area having special flood or flood-related
erosion hazards, and shown on the Flood Insurance Rate Maps as Zones A, AO, AE,
A99, AH, VE, or V.
(2020, ord 20-61, sec 6.) 5F-3-2
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Section 5F-3-3. Drainage (plumbing) systems.
(a) Drainage systems that have openings below the base flood elevation shall be
provided with an automatic backwater valve installed in each discharge line
passing through a building exterior wall, except backwater valves may be deleted if
the fixture drainage openings are located at or above a floor level which is above the
surrounding ground level.
(b) Drainage systems for emergency servicing facilities that are required to remain in
operation during a flood shall be provided with a sealed holding tank and the
necessary isolation and diversion piping and appurtenances to withhold or postpone
sewage discharge to the sewer system during the flood. The holding tank shall be
sized for storage of at least one hundred fifty percent of the anticipated demand for
a twenty-four hour period. Vents provided for such holding tank shall terminate at
an elevation of at least one foot above the base flood elevation.
(c) All pipes in a plumbing vent system shall terminate at an elevation of at least one
foot above the base flood elevation.
(d) All pipe openings through exterior walls below the base flood elevation shall be
floodproofed to prevent infiltration of flood water through spaces between pipes and
wall construction materials by use of embedded collars, sleeves, waterstops, or
other means as may be approved by the authority having jurisdiction.
(2020, ord 20-61, sec 6.) 5F-3-3
Section 5F-3-4. Private sewage disposal/treatment.
An individual private sewage disposal system or a treatment facility may be
permitted in a special flood hazard area when the design and location of such system or
facility is approved by the State department of health. In addition to complying with
public health regulations and administrative rules of the State department of health,
any such new or replacement sewage disposal system shall be designed to minimize or
eliminate infiltration of flood waters into the system and discharges from the system
into flood waters.
(2020, ord 20-61, sec 6.) 5F-3-4
Section 5F-3-5. Water supply systems.
(a) Potable water supply systems that are located in a special flood hazard area shall
be designed and installed in such a manner as to prevent contamination from flood
waters up to the base flood elevation. Location and construction of private water
supply wells shall comply with rules and regulations of the department of water
supply of the County of Hawai‘i.
(b) Potable water supply tanks, filters, softeners, heaters, and all water-supplied
appliances and fixtures located below the base flood elevation shall be protected
against contamination by covers, walls, copings, or castings. All vent pipes serving
the water supply system shall terminate at an elevation of at least one foot above
the base flood elevation.
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§ 5F-3-5 H AWAI‘I C OUNTY C ODE
(c) Backflow preventers or devices approved by the department of water supply shall
be installed on water service lines as close to the property control valve as possible
to protect the public water system from backflow or back siphonage of flood waters
or other contaminants in the event of a line break. Devices shall be installed at
accessible locations and shall be maintained in good working condition by the
owner. The backflow preventers or devices shall be subject to periodic testing as
prescribed in the rules and regulations of the department of water supply.
(d) An approved double-check valve assembly shall be used in lieu of any vacuum
breaker, permitted, or otherwise required under this chapter when located below
the regulatory flood elevation.
(e) Air relief valves are permitted on private pipelines only when installed at least one
foot above the base flood elevation.
(2020, ord 20-61, sec 6.) 5F-3-5
Section 5F-3-6. Plumbing piping under buildings.
Plumbing piping under buildings constructed on stilts shall be securely anchored
against lateral movement and flotation and protected against damage by flood water
and debris. Protection shall be provided by the structural enclosure of such piping or by
attaching such piping to the downstream side of structural members which are large
enough to provide this protection.
(2020, ord 20-61, sec 6.) 5F-3-6
SUPP. 11 (1-2022)
5F-14