Page 650 - 2018_IRC

PLUMBING FIXTURES

P2706.1.1 Hub drains. Hub drains shall be in the form of from the finished interior dimension of the compart-
a hub or a pipe that extends not less than 1 inch (25 mm) ment provided that the shower compartment has a
above a water-impervious floor. cross-sectional area of not less than 1,300 square
2
P2706.1.2 Standpipes. Standpipes shall extend not less inches (0.838 m ).
than 18 inches (457 mm) and not greater than 42 inches P2708.1.1 Access. The shower compartment access and
(1067 mm) above the trap weir. egress opening shall have a clear and unobstructed fin-
P2706.1.2.1 Laundry tray connection to standpipe. ished width of not less than 22 inches (559 mm).
Where a laundry tray waste line connects into a stand- P2708.2 Shower drain. Shower drains shall have an outlet
pipe for an automatic clothes washer drain, the stand- size of not less than 1 / inches [38 mm] in diameter.
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pipe shall extend not less than 30 inches (762 mm) 2
above the standpipe trap weir and shall extend above P2708.3 Water supply riser. Water supply risers from the
the flood level rim of the laundry tray. The outlet of the shower valve to the shower head outlet, whether exposed or
laundry tray shall not be greater than 30 inches (762 concealed, shall be attached to the structure using support
mm) horizontally from the standpipe trap. devices designed for use with the specific piping material or
fittings anchored with screws.
P2706.2 Prohibited waste receptors. Plumbing fixtures that
are used for washing or bathing shall not be used to receive P2708.4 Shower control valves. Individual shower and tub/
the discharge of indirect waste piping. shower combination valves shall be equipped with control
valves of the pressure-balance, thermostatic-mixing or com-
Exceptions: bination pressure-balance/thermostatic-mixing valve types
1. A kitchen sink trap is acceptable for use as a recep- with a high limit stop in accordance with ASSE 1016/ASME
tor for a dishwasher. A112.1016/CSA B125.16. The high limit stop shall be set to
2. A laundry tray is acceptable for use as a receptor for limit the water temperature to not greater than 120°F (49°C).
a clothes washing machine. In-line thermostatic valves shall not be used for compliance
with this section.
P2708.5 Hand showers. Hand-held showers shall conform to
SECTION P2707 ASME A112.18.1/CSA B125.1. Hand-held showers shall
DIRECTIONAL FITTINGS provide backflow protection in accordance with ASME
P2707.1 Directional fitting required. Approved directional- A112.18.1/CSA B125.1 or shall be protected against back-
type branch fittings shall be installed in fixture tailpieces flow by a device complying with ASME A112.18.3.
receiving the discharge from food-waste disposer units or
dishwashers.
SECTION P2709
SHOWER RECEPTORS
SECTION P2708 P2709.1 Construction. Where a shower receptor has a fin-
SHOWERS ished curb threshold, it shall be not less than 1 inch (25 mm)
P2708.1 General. Shower compartments shall have not less below the sides and back of the receptor. The curb shall be
2
than 900 square inches (0.6 m ) of interior cross-sectional not less than 2 inches (51 mm) and not more than 9 inches
area. Shower compartments shall be not less than 30 inches (229 mm) deep when measured from the top of the curb to the
(762 mm) in minimum dimension measured from the finished top of the drain. The finished floor shall slope uniformly
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interior dimension of the shower compartment, exclusive of toward the drain not less than / unit vertical in 12 units hori-
4
fixture valves, shower heads, soap dishes, and safety grab zontal (2-percent slope) nor more than / unit vertical per 12
1
2
bars or rails. The minimum required area and dimension shall units horizontal (4-percent slope) and floor drains shall be
be measured from the finished interior dimension at a height flanged to provide a water-tight joint in the floor.
equal to the top of the threshold and at a point tangent to its P2709.2 Lining required. The adjoining walls and floor
centerline and shall be continued to a height of not less than framing enclosing on-site built-up shower receptors shall be
70 inches (1778 mm) above the shower drain outlet. Hinged
shower doors shall open outward. The wall area above built- lined with one of the following materials:
in tubs having installed shower heads and in shower compart- 1. Sheet lead.
ments shall be constructed in accordance with Section 2. Sheet copper.
R702.4. Such walls shall form a water-tight joint with each
other and with either the tub, receptor or shower floor. 3. Plastic liner material that complies with ASTM D4068
or ASTM D4551.
Exceptions:
4. Hot mopping in accordance with Section P2709.2.3.
1. Fold-down seats shall be permitted in the shower,
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provided that the required 900-square-inch (0.6 m ) 5. Sheet-applied load-bearing, bonded waterproof mem-
dimension is maintained when the seat is in the branes that comply with ANSI A118.10.
folded-up position. The lining material shall extend not less than 2 inches (51
2. Shower compartments having not less than 25 mm) beyond or around the rough jambs and not less than 2
inches (635 mm) in minimum dimension measured inches (51 mm) above finished thresholds. Sheet-applied load

2018 INTERNATIONAL RESIDENTIAL CODE ® 625
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