Connection to Sanitary Drainage Systems




sanitary

7.4.2.1.

(1) Every fixture shall be directly connected to a sanitary drainage system, except that

(a) drinking fountain may be


(i) indirectly connected to a sanitary drainage system.


see appendix A-7.4.2.1.

(ii) connected to a storm drainage system provided that where the system is subjected to backflow, a check valve is installed in the fountain waste pipe.



  storm 


                          




(b) laundry plumbing appliances may be indirectly connected to a sanitary drainage system

7.4.3.2.(1)

Indirect connections or any trap that may overflow shall not be located in a crawl space or any other unfrequented area.



7.3.3.12.(2)

The size of the air break shall be at least 25 mm.




(c) fixtures or plumbing appliances, other than floor drains, except as provided in Sentence 7.1.5.2.(2), that discharge only clear water waste may be connected to a storm drainage system.



Note: the Code describes neither the kinds of the fixtures, nor a way to connect these fixtures to a storm drainage system. But most likely these are  the fixtures that are listed in Subclauses (iii) to (vi) of Clause 7.4.2.1.(d).

See also 7.4.2.3.(3)




(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




See also 7.4.2.3.(2)

7.4.2.3.(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.



(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






(vii) a drain line from a HVAC system or equipment






7.4.2.2.(1)

An overflow from a rainwater tank shall not be directly connected to a storm drainage system.







7.5.7.2. Branch Vent Sizing

  1. An air gap shall not be located in a noxious environment.
  2. Every air gap shall be not less than 25 mm high and at least twice the diameter of the opening of the water supply outlet in height.

4.4.2.1.(1)

(e)

fixtures that have hydraulic load totalling not more than 1 1/2 fixture units may be connected  to a vertical section of a circuit vent.


(f)

fixtures that have hydraulic load totalling not more than 1 1/2 fixture units may be connected to a vertical section of a yoke vent.


(g)

 fixtures may be connected to a vent stack.


4.4.2.1. (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

  1. receives a discharge of 30 or more fixture units, or
  2. receives a discharge from fixtures located on 2 or more storeys.



7.4.2.1.(3)

No other fixture shall be connected to a lead bend or stub that serves a water closet.


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 1/4", and

(b)

is terminated above the flood level rim of a directly connected fixture with a minimum diameter waste of 1 1/2" to form an air break.



7.4.7.1.(9)

Every indirect drainage pipe carrying waste from a food receptacle shall have a cleanout access at every change of direction of more than 45o.

Compare two pictures and find a difference.

I have always known that Ontario Plumbing is too clever a science for the simple mortal.


7.4.2.3. (2)

Fixture drains from fixtures that are listed in Subclauses (i) and (ii) of Clause 7.4.2.1.(1)(d) may be directly connected to a pipe that

(a) is terminated to form and 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.


7.5.1.1.(3)(c)

A trap is not required to be vented where it forms part of an indirect drainage system, less than three storeys high.


7.4.2.3. (3)

Fixture drains from fixtures that are listed in Subclauses (iii) to (vi) of Clause 7.4.2.1.(1)(d) may be directly connected to a pipe that

(a) is terminated to form and 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.


7.5.1.1.(3)(b)

A trap is not required to be vented where it serves a storm drainage system.


7.4.5.3. Connection of Subsoil Drainage Pipe to Sanitary Drainage system.


  1. ...no foundation drain or subsoil drainage pipe shall connect to a sanitary drainage system, except


  1. Where a storm drainage system is not available or soil conditions prevent drainage to a culvert or dry well, a foundation drain or subsoil drainage pipe may connect to a sanitary drainage system.


  1. Where a subsoil drainage pipe may be connected to a sanitary drainage system, the connection shall be made on the upstream side of a trap with a cleanout or a trapped sump.


Trapped Sump



7.5.1.1.(3)(a)

A trap is not required to be vented where it serves a subsoil drainage pipe.



7.3.3.8.(1) Every roof drain shall be securely connected to a leader and provisions shall be made for expansion.