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 fifteen (15) inches (381 mm) from its
center to any side wall or obstruction nor closer than thirty (30) inches (762
mm) center to center to any similar fixture. The clear space in front of any
water closet or bidet shall be not less than twenty-four (24) inches (610 mm).
No urinal shall be set closer than twelve (12) inches (305 mm) from its center
to any side wall or partition nor closer than twenty-four (24) inches (610 mm)
center to center.
EXCEPTIONS:
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1. The clear space in front of a water closet, lavatory
or bidet in dwelling units and sleeping units shall be not less than 21 inches
(533 mm).
2. The installation of paper dispensers or
accessibility grab bars shall not be considered obstructions.
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405.4
Application. No individual, public or private corporation, firm,
political subdivision, government agency, or other legal entity, may, for
purposes of use in the state of Washington, distribute, sell, offer for sale,
import, install, or approve for installation any plumbing fixtures or fittings
unless the fixtures or fittings meet the standards as provided for in this
chapter.
407.1
Application. Lavatories shall comply with ASME A112.19.1/CSA
B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, ASME A112.19.12, CSA
B45.5/IAPMO Z124, CSA B45.8/IAPMO Z403, CSA B45.11/IAPMO Z401 or CSA
B45.12/IAPMO Z402. Group wash fixtures shall comply with the requirements of
Section 401.2. Every 20 inches (508 mm) of rim space of a group wash fixture
shall be considered as one lavatory for determining the number of lavatories
required in accordance with the International Building Code Table 2902.1.
Lavatory assemblies with automatic soap dispensers, faucets, or
hand dryers shall comply with IAPMO IGC 127.
407.2
Water Consumption. The
maximum water flow rate of faucets shall comply with Section 407.2.1 through
407.2.2.
407.2.1
Maximum Flow
Rate. The maximum flow rate for public lavatory faucets shall not exceed
0.5 gpm at 60 psi (1.9 L/m at 414 kPa).
407.2.1.1
Residential Lavatory
Faucets. The maximum flow rate of residential lavatory faucets shall not
exceed 1.2 gallons (4.54 L) per minute at 60 psi. The minimum flow rate of
residential lavatory faucets shall not be less than 0.8 gallons (3.03 L) per
minute at 20 psi.
407.2.1.2
Lavatory Faucets in Common and Public Use Areas. The maximum flow
rate of lavatory faucets, installed in common and public use areas (outside of
dwellings or sleeping units) in residential buildings, shall not exceed 0.5
gallons (1.89 L) per minute at 60 psi.
407.2.2
Metering Faucets.
Metered faucets shall deliver a maximum of 0.25 gallons (1.0 L) per metering
cycle in accordance with ASME A112.18.1/CSA B125.1.
407.4
Metering Valves. Lavatory
faucets located in restrooms intended for use by the general public shall be
equipped with a metering valve designed to close by spring or water pressure
when left unattended (self-closing).
EXCEPTIONS:
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1. Where designed and installed for use by persons with
a disability.
2. Where installed in day care centers, for use
primarily by children under 6 years of age.
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408.2
Water Consumption. Showerheads shall meet the maximum flow rate of
1.8 gallons (6.81 L) per minute measured at 80 psi. Showerheads shall be
certified to the performance criteria of the U.S. EPA Water-Sense Specification
for Showerheads.
EXCEPTION:
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Emergency use showers shall be exempt from the maximum
water usage rates.
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408.2.1
Multiple Showerheads Serving One Shower. When a shower is served
by more than one showerhead, including handheld showerheads, the combined flow
rate of all showerheads and/or other shower outlets controlled by a single
valve shall not exceed 1.8 gallons (6.81 L) per minute at 80 psi, or the shower
shall be designed to allow only one shower outlet to be in operation at a
time.
408.4
Waste
Outlet. Showers shall have a waste outlet and fixture tailpiece not less
than two (2) inches (50 mm) in diameter. Fixture tailpieces shall be
constructed from the materials specified in Section 701.2 for drainage piping.
Strainers serving shower drains shall have a waterway at least equivalent to
the area of the tailpiece.
EXCEPTION:
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In a residential dwelling unit where a 2 inch waste is
not readily available and approval of the AHJ has been granted, the waste
outlet, fixture tailpiece, trap and trap arm may be 1-1/2 inch when an existing
tub is being replaced by a shower sized per Section 408.2. This exception only
applies where one shower head rated at 1.8 gpm is installed.
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In a residential dwelling unit where a 2 inch waste is not
readily available and approval of the AHJ has been granted, the waste outlet,
fixture tailpiece, trap and trap arm may be 1-1/2 inch when an existing tub is
being replaced by a shower sized per Section 408.2. This exception only applies
where one shower head rated at 1.8 gpm is installed.
408.6
Shower Compartments.
Shower compartments, regardless of shape, shall have a minimum finished
interior of nine hundred (900) square inches (0.58
m
2) and shall also be capable of encompassing a
thirty (30) inch (762 mm) circle. The minimum required area and dimensions
shall be measured at a height equal to the top of the threshold and at a point
tangent to its centerline. The area and dimensions shall be maintained to a
point of not less than seventy (70) inches (1,778 mm) above the shower drain
outlet with no protrusions other than the fixture valve or valves, shower head,
soap dishes, shelves, and safety grab bars or rails. Fold-down seats in
accessible shower stalls shall be permitted to protrude into the thirty (30)
inch (762 mm) circle.
EXCEPTIONS:
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1. Showers that are designed to comply with ICC/ANSI
A117.1.
2. The minimum required area and dimension shall not
apply for a shower receptor having overall dimensions of not less than thirty
(30) inches (762 mm) in width and sixty (60) inches (1,524 mm) in
length.
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411.2
Water Consumption. The effective flush volume of all water closets
shall not exceed 1.28 gallons (4.8 L) per flush when tested in accordance with
ASME A112.19.2/CSA B45.1.
EXCEPTIONS:
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1. Water closets located in day care centers, intended
for use by young children may have a maximum water use of 3.5 gallons per flush
or 13.25 liters per flush.
2. Water closets with bed pan washers may have a
maximum water use of 3.5 gallons per flush or 13.25 liters per flush.
3. Blow out bowls, as defined in ANSI/ASME A112.19.2M,
Section 5.1.2.3 may have a maximum water use of 3.5 gallons per flush or 13.25
liters per flush.
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411.2.2
Performance. Water closets installed shall meet or exceed the
minimum performance criteria developed for certification of high-efficiency
toilets under the WaterSense program sponsored by the U.S. Environmental
Protection Agency (EPA).
411.2.3
Flushometer Valve Activated Water Closets. Flushometer valve
activated water closets shall have a maximum flush volume of 1.28 gallons (4.8
Lpf) of water per flush in accordance with ASME A112.19.2/CSA B45.1.
412.1
Application.
Urinals shall comply with ASME A112.19.2/CSA B45.1, ASME A112.19.19, or CSA
B45.5/IAPMO Z124. Wall-mounted urinals shall have an average water consumption
not to exceed 0.125 gallons (0.47 L) per flush. Other urinals shall have an
average water consumption not to exceed 0.5 gallons (1.89 L) per
flush.
414.3
Drainage
Connection. Domestic dishwashing machines shall discharge indirectly
through an air gap fitting in accordance with Section 807.3 into a waste
receptor, awye branch fitting on the tailpiece of a kitchen sink, or dishwasher
connection of a food waste disposer. Commercial dishwashing machines shall
discharge indirectly through an air gap.
415.2
Drinking Fountain
Alternatives. This section is not adopted. See Building Code chapter
29.
418.3
Location of Floor
Drains. Floor drains shall be installed in the following areas:
1. Toilet rooms containing two (2) or more
water closets or a combination of one (1) water closet and one (1) urinal,
except in a dwelling unit. The floor shall slope toward the floor
drains.
2. Laundry rooms in
commercial buildings and common laundry facilities in multifamily dwelling
buildings.
420.0
Sinks
420.2
Water Consumption. Sink faucets shall have a maximum flow rate of
not more than 2.2 gpm at 60 psi (8.3 L/m at 414 kPa) in accordance with ASME
A112.18.1/CSA B125.1.
EXCEPTION:
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Clinical sinks, laundry trays, service
sinks.
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420.2.1
Kitchen Faucets. Kitchen faucets shall have a maximum flow rate of
not more than 1.8 gallons (6.81 L) per minute at 60 psi. Kitchen faucets may
temporarily increase the flow above the maximum rate, but not to exceed 2.2
gallons (8.3 L) per minute at 60 psi, and must default to a maximum flow rate
of 1.8 gallons (6.81 L) per minute at 60 psi.
EXCEPTION:
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Where faucets meeting the maximum flow rate of 1.8 gpm
(6.81 L) are unavailable, aerators or other means may be used to achieve
reduction.
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420.3
Prerinse Spray Valve.
Commercial food service prerinse spray valves shall have a maximum flow rate of
1.6 gallons per minute (gpm) at 60 pounds-force per square inch (psi) (6.0 L/m
at 414 kPa) in accordance with ASME A112.18.1/CSA B125.1 and shall be equipped
with an integral automatic shutoff.
422.0
Minimum Number of Required
Fixtures. For minimum number of plumbing fixtures required, see Building
Code Chapter 29 and Table 2902.1.
423.0
Landscape
Irrigation.
423.1
Spray Sprinkler Body. Spray sprinkler bodies must include an integral
pressure regulator and must meet the water efficiency and performance criteria
and other requirements of environmental protection agency water sense program
product specification for spray sprinkler bodies.
EXCEPTION:
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Spray sprinkler bodies specifically excluded from the
scope of the environmental protection agency water sense program product
specification for spray sprinkler bodies.
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Sections 422.1 through 422.5 and Table 422.1 are not
adopted.