Fittings and Connections


T



Double T or Cross Fitting


1/4 Bend


Double Y


Double TY


Adapter


Connector


Mechanical Joint


Floor Flange


Floor Drain


Atmospheric Vacuum Breaker


Pressure Vacuum Breaker


Double Waste


Increaser


Reducer



7.2.4.1. T and Cross Fittings (See Appendix A.)

  1. A T fitting shall not be used in a drainage system except to connect a vent pipe
  2. A cross fitting shall not be used in a drainage system.


7.2.4.2.

  1. No pipe fitting, joint or connection that would tend to intercept solids or reduce the flow through a pipe by more than 10 percent shall be used in plumbing system.


7.2.4.3. One-Quarter Bends

  1. A 1/4" bend of 4" or less that has a center-line radius that is less than the size of the pipe shall not be used to join two soil or waste pipes.
  2. A 1/4 bend of 4" size or less shall not be used on a horizontal building drain, a branch of the building drain, or building sewer except to change direction from horizontal to vertical.


7.2.4.4. Fitting Restricted in Use

  1. No double Y, double TY, double T or double waste fitting shall be installed in a nominally horizontal soil or waste pipe.


7.3.3.5. Increaser or Reducer

  1. Every connection between two pipes of different size shall be made with an increaser or a reducer fitting installed so that it will permit the system to be completely drained.


7.2.5.11. Transition Solvent Cement (See Appendix A)

  1. Solvent cement for transitions shall conform to
  1. CAN/CSA-B181.1, "ABS Drain, Waste and Vent Pipe and Pipe Fittings", or
  2. CAN/CSA-B181.2, "PVC Drain, Waste and Vent Pipe and Pipe Fittings".
  1. Transition solvent cement shall only be used for joining an ABS plumbing system to a PVC plumbing system.


7.2.9.1. Cement Mortar

  1. Cement mortar shall not be used for joining.


7.3.3.7. Dissimilar Connections

  1. Adapters, connectors or mechanical joints used to join dissimilar materials shall be designed to accommodate the required transition.


7.2.10.2. Brass Floor Flanges

  1. Brass floor flanges shall be certified to CSA B158.1, "Cast Brass Solder Joint Drainage, Waste and Vent Fittings".
  2. ABS floor flanges shall be certified to CAN/CSA-B181.1., "ABS Drain, Waste, and Vent Pipe and Fittings".
  3. PVC floor flanges shall be certified to CAN/CSA-B181.2, "PVC Drain, Waste, and Vent Pipe and Fittings".
  4. Cast iron, copper and aluminum floor flanges shall be suitable for the purpose.


7.1.5.2. Floor Drains

  1. Where gravity drainage to a sanitary drainage system is possible, a floor drain shall be installed in a basement forming part of a dwelling unit.
  2. Where gravity drainage to a sanitary drainage system is not possible, the floor drain required by Sentence (1) may be connected to a storm drainage system, dry well or drainage ditch provided it is located where it can receive only clear waste or storm sewage.
  3. A floor drain shall be provided in a public laundry room, garbage room, incinerator room, boiler or heating room, serving more than one dwelling unit.


7.4.3.4. Fixtures Located in Chemical Storage Locations and Elevator Pits

  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.
  2. If a floor drain is provided in an elevator pit, it shall be installed in accordance with Section 2.7. of the CAN/CSA-B44, "Safety Code for Elevators, Escalators, Dumbwaiters, Moving Walks and Freight Platform Lifts".


7.6.2.5. Vacuum Breakers and Floor Levels

  1. Where the critical level is not marked on an atmospheric vacuum breaker or pressure vacuum breaker, the critical level shall be taken as the lowest point on the device.
  2. Where an atmospheric vacuum breaker is installed, or shall be located on the downstream side of the fixture control valve or faucet so that it will be subject to water pressure
  1. only when the fixture control valve or faucet is open, and
  2. for periods of use not exceed 12 h continuous.


  1. An atmospheric vacuum breaker shall be installed so that the critical level is at least the distance specified by the manufacturer at which the device will operate safely but not less than 25 mm above
  1. the flood level rim of a fixture or tank, or
  2. the highest point open to atmosphere in an irrigation system.


  1. A pressure vacuum breaker shall be installed with its critical level at least 300 mm above
  1. the flood level rim of the fixture or tank, or
  2. the highest point open to atmosphere in an irrigation system.
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