Urinal Flush Tanks and Flushometers

Urinal flush tanks and flushometers are installed to operate both urinals and some types of water closets.


All washroom facilities having urinals equipped with automatic flushing devices must also have a floor drain installed as outlined in Part 3 of the Ontario Building Code.

3.7.4.13.(1)

A floor drain shall be installed in a washroom containing urinals equipped with automatic flushing devices.



Urinal Tank


Urinal Tank Flush Valves or urinal siphons have no moving parts. Water is siphoned rapidly and automatically from the urinal tank. They will operate at intervals ranging from one to sixty minutes depending on the rate of the urinal tank refill.

7.6.4.2.(2)

The flush cycle for each fixture that is water closet or urinal and that is installed as a replacement for a fixture in a plumbing that exists before the 1st day of January 1996 shall not exceed the maximum flush cycle listed for that fixture in Table 7.6.4.2.A.

7.6.4.2.(3)

urinals being installed in buildings under construction come are described in Table 7.5.4.2.B..


7.6.3.1.

Except as provided in Sentence (2) the size of every pipe in a water distribution system that supplies water to a fixture or device shall comply with Table 7.6.3.1. that sets the minimum size of a supply pipe for a urinal flush tank at 1/2".


Table 7.6.4.2.A. and Table 7.6.4.2.B.

Urinals equipped with automatic flushing devices shall be controlled to prevent necessary flush cycle during building down time.


Flush Tube


Flush tubes connect urinal tanks to the urinals. Flush tubes of 3/4" to 1 1/4" are used to convey the water to one or more urinals.


Types of Flushometers



Piston Type




Diaphragm Type


All flushometers are sold with an integral vacuum breaker installed in the fixture flush tube.


Flushometers Most Famous Manufactures

  • Crane
  • Teck


Electronic Flushometers



Code Requirements for Direct Flush Valves (Flushometers)

7.2.10.8.

  1. Every direct flush valve shall
  1. open fully and close positively under service pressure,
  2. complete its cycle of operation automatically,
  3. be provided with a means of regulating the volume of water that is discharges, and
  4. be provided with a vacuum breaker unless the fixture is designed so that back-siphonage cannot occur.


7.6.1.11.

  1. Every flushing device that serves a water closet or one or more urinals shall have sufficient capacity and be adjusted to deliver at each operation a volume of water that will thoroughly flush the fixture or fixtures that it serves. (See Appendix A.)
  2. Where a manually operated flushing device is installed it shall serve only one fixture.


Supply Requirements

Table 7.6.3.1.

  1. For a direct flush urinal and a direct flush service sink the minimum (supply pipe) is 3/4".


Flush Volumes

Replacement Fixtures

7.6.4.2.(2)

The flush cycle for each fixture that is a water closet or urinal and that is installed as a replacement for a fixture in a building that existed before the 1st day of January 1996 shall not exceed the maximum flush cycle listed for that fixture in Table 7.6.4.2.A (5.68 letres).


New Installations

7.6.4.2.(3)

Except as provided in Sentence (2) the flush cycle for each fixture that is a water closet or urinal shall not exceed the maximum flush cycle  listed for that fixture in Table 7.6.4.2.B (3.8 litres).


7.6.4.2.(4)

Sentence (2) and (3) do not apply to a fixture located in a heritage building, care or detention occupancy or passenger station.

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