Division B
Acceptable Solutions
Part 10 — Energy and Water Efficiency
Section 10.3. 
Water Efficiency
10.3.1. Design and Installation
10.3.1.1. Compliance
1) In addition to the requirements in this section, all plumbing fixtures must comply with Book II Division B, Part 2 of this By-law.
2) In addition to the requirements of this By-law, all water uses and discharges are
subject to Water Works By-law 4848 and Sewer and Watercourse By-law 8093.
10.3.1.2. Plumbing Fixture Fitting Maximum Flow Rates
1) The flow rates of fittings that supply water to plumbing fixtures must not exceed the maximum flow rate at the test pressures listed for that fitting in Table 10.3.1.2.
| Table 10.3.1.2. Maximum Flow Rate Forming part of Sentence 10.3.1.2.(1) | ||
| Fitting | Maximum Flow Rate (L/min) | Test Pressure (kPa) |
| Lavatory Faucet (for private use) | 5.7 | 415 |
| Lavatory Faucet (for public use) | 1.9(1)(2) | 415 |
| Kitchen Faucet (non-residential) | 8.3 | 415 |
| Kitchen Faucet (residential) | 8.3 | 415 |
| Shower Head | 7.6(3) | 550 |
| Pre-Rinse Spray Valve | 4.8(4) | 415 |
| Wash Fountain, per plumbing fixture fitting | 6.8(5) | 415 |
| Notes to Table 10.3.1.2.: | |
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| (1) | A metering fixture faucet is limited to 1.0 L per cycle. |
| (2) | A lavatory faucet in a health care facility is permitted a maximum flow rate of 8.3 L/min (at 415 kPa test pressure). The Chief Building Official may, for human health reasons, permit exemptions within other facilities, to a maximum flow rate of 8.3 L/min (at 415 kPa test pressure). |
| (3) | Emergency and safety shower heads and shower heads in health care facilities and correctional facilities are exempted from this requirement. |
| (4) | Each pre-rinse spray valve must be equipped with an automatic shut-off. |
| (5) | A maximum flow rate of 6.8 L/min is permitted for each 508 mm of rim space. For a wash fountain with metering fixture faucets, a maximum of one metering fixture faucet is permitted for each 508 mm of rim space. A metering fixture faucet is limited to 1.0 L per cycle. |
10.3.1.3. Plumbing Fixture Efficiency
1) The flush cycle for the installation of a water closet or urinal must not exceed the
flush cycle listed for that plumbing fixture in Table 10.3.1.3.(1).
| Table 10.3.1.3.(1) Maximum Flush Cycle Forming part of Sentence 10.3.1.3.(1) | |
| Plumbing Fixture | Maximum Flush Cycle (L) |
| Water Closet (Tank Type) | 4.8(1)(2) |
| Water Closet (Direct Flush) | 4.8(1) |
| Urinal (Tank Type) | 1.9(3) |
| Urinal (Direct Flush) | 1.9 |
| Notes to Table 10.3.1.3.(1): | |
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| (1) | A maximum flush cycle of 6.0 L may be permitted where, in the opinion of the Chief Building Official, the existing plumbing system cannot accommodate and cannot be updated to accommodate the required flush cycle. |
| (2) | A water closet with a dual flush cycle of 4.1 L or less and 6.0 L complies with this requirement. |
| (3) | The water supply to flush tanks equipped for automatic flushing shall be controlled with a timing device that limits operation to the period during which the building is normally occupied. |
10.3.1.4. Residential Landscape Irrigation Systems
1) Residential landscape irrigation systems that apply herbicides, fungicides, insecticides,
fertilizers, soil amendments or other chemicals or pesticides by means of irrigation
water are prohibited.
2) Residential landscape irrigation systems shall be equipped with a shut-off valve,
which shall be located upstream of the backflow preventer and provided with unobstructed
access.
3) Where the water pressure supplied to a property exceeds 550 kPa, the residential landscape
irrigation system shall be equipped with a pressure reducing valve providing a maximum
supplied pressure of 415 kPa and located downstream of the backflow preventer.
10.3.1.5. Geoexchange Systems
1) Make-up water for a closed loop geoexchange (geothermal) ground heat exchanger must
be provided by a feeder tank isolated from the domestic water supply.
2) The use of a direct connection to the domestic water supply as a source of make-up
water for a closed loop geoexchange (geothermal) ground heat exchanger is prohibited.
10.3.1.6. Vehicle Wash Facilities
1) The maximum flow rate of a spray wand, foamy brush or similar plumbing fixture shall not exceed 11.4 L/min at a self-service vehicle wash.
2) A water recycling system that recycles and reuses at least 60% of the water and rinse
water shall be installed, used and maintained at a conveyor vehicle wash or in-bay vehicle wash.