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7.4.1. Application
7.4.1.1. Application of Drainage Systems
(1) This Section applies to sanitary drainage systems and storm drainage systems.
7.4.2. Connections to Drainage Systems
7.4.2.1. Connections to Sanitary Drainage Systems
(1) Every fixture shall be directly connected to a sanitary drainage system, except that,
a) drinking fountains may be,
i) indirectly connected to a sanitary drainage system, or
ii) connected to a storm drainage system provided that where the system is subject to backflow,
a check valve is installed in the fountain waste pipe,
b) laundry plumbing appliances may be indirectly connected to a sanitary drainage system,
c) fixtures or plumbing appliances, other than floor drains, except as provided in Sentence
7.1.4.2.(2), that discharge only clear water waste may be connected to a storm drainage system,
d) the following devices shall be indirectly connected to a drainage system:
i) a device for the display, storage, preparation or processing of food or drink,
ii) a sterilizer,
iii) a device that uses water as a cooling or heating medium,
iv) a water operated device,
v) a water treatment device,
vi) a drain or overflow from a water system or a heating system, or
vii) a drain line from a HVAC system or equipment,
e) fixtures that have a hydraulic load totaling not more than 1 . fixture units may be connected
to a vertical section of a circuit vent provided,
i) the fixtures are located in the same storey as the fixtures served by the vent pipes,
ii) not more than 2 fixtures are connected to the vent pipe, and
iii) where 2 fixtures are connected to the vent pipe, the connection is done with a double fitting
in conformance with Table 7.2.4.5.,
f) fixtures that have a hydraulic load totaling not more than 1 . fixture units may be connected to the vertical section of a yoke vent provided,
i) not more than 2 fixtures are connected to the vent pipe, and
ii) where 2 fixtures are connected to the vent pipe, the connection is done with a double fitting in conformance with Table 7.2.4.5.,
g) fixtures may be connected to a vent stack provided,
i) the total hydraulic load of the connected fixtures does not exceed 8 fixture units,
ii) at least 1 fixture is connected to a vertical portion of the vent stack and upstream of any other fixtures,
iii) no other fixture is connected downstream of a water closet, and
iv) all fixtures are located in the lowest storey served by the vent stack, and
h) floor drains within walk-in coolers shall be connected to a sanitary drainage system,
i) indirectly with an air break, or
ii) directly with a backwater valve installed on the drainage system before connection to the sanitary building drain.
(2) The connection of a soil or waste pipe to a nominally horizontal soil or waste pipe or to a nominally horizontal offset in a soil or waste stack shall be respectively at least 1 500 mm measured horizontally from the bottom of a soil or waste stack or from the bottom of the upper vertical section of the soil or waste stack that,
a) receives a discharge of 30 or more fixture units, or
b) receives a discharge from fixtures located on 2 or more storeys.
(3) No other fixture shall be connected to a lead bend or stub that serves a water closet.
(4) A soil or waste pipe that serves more than one clothes washer, and in which pressure zones are created by detergent suds, shall not serve for connecting other soil or waste pipes.
7.4.2.2. Connection of Overflows from Rainwater Tanks
(1) An overflow from a rainwater tank shall not be directly connected to a storm drainage system.
7.4.2.3. Direct Connections
(1) Two or more fixture outlet pipes that serve outlets from a single fixture that is listed in Clause 7.4.2.1.(1)(d) may be directly connected to a branch that,
a) has a size of at least 1 . in., and
b) is terminated above the flood level rim of a directly connected fixture with a minimum diameter waste of 1 . in. to form an air break.
(2) Fixture drains from fixtures that are listed in Subclauses 7.4.2.1.(1)(d)(i) and (ii) may be directly connected to a pipe that,
a) is terminated to form an air break above the flood level rim of a fixture that is directly connected to a sanitary drainage system, and
b) is extended through the roof when fixtures that are on 3 or more storeys are connected to it.
(3) Fixture drains from fixtures that are listed in Subclauses 7.4.2.1.(1)(d)(iii) to (vi) may be directly connected to a pipe that,
a) is terminated to form an air break above the flood level rim of a fixture that is directly connected to a storm drainage system, and
b) is extended through the roof when fixtures that are on 3 or more storeys are connected to it.
(4) Every waste pipe carrying waste from a device for the display, storage, preparation or processing of food or drink, shall be trapped and have a minimum diameter equal to the diameter of the drain outlet from the device.
7.4.3. Location of Fixtures
7.4.3.1. Plumbing Fixtures
(1) Sanitary units, bathtubs and shower baths shall not be installed adjacent to wall and floor surfaces that are pervious to water.
7.4.3.2. Restricted Locations of Indirect Connections and Traps
(1) Indirect connections or any trap that may overflow shall not be located in a crawl space or any other unfrequented area.
7.4.3.3. Equipment Restrictions Upstream of Interceptors
(1) Except as provided in Sentence (2), equipment discharging waste with organic solids shall not be located upstream of an interceptor.
(2) If a food scrap interceptor has been installed upstream of the grease interceptor, equipment discharging waste with organic solids may discharge through a grease interceptor.
7.4.3.4. Fixtures Located in Chemical Storage Locations
(1) A floor drain or other fixture located in an oil transformer vault, a high voltage room or any room where flammable, dangerous or toxic chemicals are stored or handled shall not be connected to a drainage system.
7.4.3.5. Macerating Toilet System
(1) A maceration toilet system shall only be installed,
a) where no connection to a gravity sanitary drainage system is available, and
b) in accordance with the manufacturer’s instructions.
7.4.3.6. Drains Serving Elevator Pits
(1) If a floor drain is provided in an elevator pit, it shall be installed in accordance with Section 2.7. of the CSA B44, “Safety Code for Elevators”. |
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