Page 697 - 2018_IRC

SANITARY DRAINAGE

P3007.3.3.1 Materials. Pipe and fitting materials shall SECTION P3008
be constructed of copper alloy, copper, CPVC, ductile BACKWATER VALVES
iron, PE, or PVC. P3008.1 Where required. Where the flood level rims of
P3007.3.3.2 Ratings. Pipe and fittings shall be rated plumbing fixtures are below the elevation of the manhole
for the maximum system operating pressure and tem- cover of the next upstream manhole in the public sewer, the
perature. Pipe fitting materials shall be compatible fixtures shall be protected by a backwater valve installed in
with the pipe material. Where pipe and fittings are bur- the building drain, branch of the building drain or horizontal
ied in the earth, they shall be suitable for burial. branch serving such fixtures.
P3007.3.4 Maximum effluent level. The effluent level P3008.2 Allowable installations. Where plumbing fixtures
control shall be adjusted and maintained to at all times are installed on a floor with a finished floor elevation above
prevent the effluent in the sump from rising to within 2 the elevation of the manhole cover of the next upstream man-
inches (51 mm) of the invert of the gravity drain inlet into hole in the public sewer, and a backwater valve is installed in
the sump. the building drain or horizontal branch serving such fixtures,
P3007.3.5 Ejector connection to the drainage system. the backwater valve shall be of the normally open type.
Pumps connected to the drainage system shall connect to a Exception: Normally closed backwater valve installations
building sewer, building drain, soil stack, waste stack or for existing buildings shall not be prohibited.
horizontal branch drain. Where the discharge line connects P3008.3 Material. Backwater valves shall comply with
into horizontal drainage piping, the connection shall be ASME A112.14.1, CSA B181.1 or CSA B181.2.
made through a wye fitting into the top of the drainage
piping and such wye fitting shall be located not less than P3008.4 Location. Backwater valves shall be installed so
10 pipe diameters from the base of any soil stack, waste that access is provided to the working parts.
stack or fixture drain.
P3007.4 Sewage pumps and sewage ejectors. A sewage SECTION P3009
pump or sewage ejector shall automatically discharge the SUBSURFACE LANDSCAPE IRRIGATION SYSTEMS
contents of the sump to the building drainage system.
P3009.1 Scope. The provisions of this section shall govern
P3007.5 Macerating toilet systems and pumped waste sys- the materials, design, construction and installation of subsur-
tems. Macerating toilet systems and pumped waste systems face landscape irrigation systems connected to nonpotable
shall comply with ASME A112.3.4/CSA B45.9 and shall be water from on-site water reuse systems.
installed in accordance with the manufacturer’s instructions.
P3009.2 Materials. Above-ground drain, waste and vent pip-
P3007.6 Capacity. Sewage pumps and sewage ejectors shall ing for subsurface landscape irrigation systems shall conform
have the capacity and head for the application requirements. to one of the standards indicated in Table P3002.1(1). Sub-
Pumps and ejectors that receive the discharge of water closets surface landscape irrigation, underground building drainage
shall be capable of handling spherical solids with a diameter and vent pipe shall conform to one of the standards indicated
of up to and including 2 inches (51 mm). Other pumps or in Table P3002.1(2).
ejectors shall be capable of handling spherical solids with a
diameter of up to and including / inch (13 mm). The mini- P3009.3 Tests. Drain, waste and vent piping for subsurface
1
2
mum capacity of a pump or ejector based on the diameter of landscape irrigation systems shall be tested in accordance
the discharge pipe shall be in accordance with Table 3007.6. with Section P2503.
P3009.4 Inspections. Subsurface landscape irrigation sys-
Exceptions:
tems shall be inspected in accordance with Section R109.
1. Grinder pumps or grinder ejectors that receive the
discharge of water closets shall have a discharge P3009.5 Disinfection. Disinfection shall not be required for
1
opening of not less than 1 / inches (32 mm). on-site nonpotable reuse water for subsurface landscape irri-
gation systems.
4
2. Macerating toilet assemblies that serve single water
closets shall have a discharge opening of not less P3009.6 Coloring. On-site nonpotable reuse water used for
3
than / inch (19 mm). subsurface landscape irrigation systems shall not be required
4
to be dyed.
TABLE 3007.6
MINIMUM CAPACITY OF SEWAGE PUMP OR SEWAGE EJECTOR P3009.7 Sizing. The system shall be sized in accordance with
DIAMETER OF THE CAPACITY OF PUMP OR EJECTOR the sum of the output of all water sources connected to the
DISCHARGE PIPE (gpm) subsurface irrigation system. Where gray-water collection
(inches) piping is connected to subsurface landscape irrigation sys-
2 2 1 tems, gray-water output shall be calculated according to the
2 / 2 30 gallons-per-day-per-occupant (liters per day per occupant)
1
3 4 6 number based on the type of fixtures connected. The gray-
For SI: 1 inch = 25.4 mm, 1 gallon per minute = 3.785 L/m.

672 2018 INTERNATIONAL RESIDENTIAL CODE ®
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