CodeChronicle
Search Pricing Login Sign up

OBC 2006 › Division B

7.5.8.4.

Version 1 — in force 1 January 2010

In force · amended
Verified · covered Verified against the 2010-01-01–2010-03-31 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · renumbered from 7.5.7.3. — Pro

Base · O. Reg. 350/06 · ext v0 →

O. Reg. 503/09, cl. 109 · ext ← current

In force 2010-01-01

OBC 2012 · continues as 7.5.8.4. — Pro

7.5.8.4. — Vent Stacks, or Stack Vents

(1) A vent stack, or stack vent shall be sized in accordance with Table 7.5.8.4. based on,

(a) the length of the vent stack or stack vent, and

(b) the total hydraulic load that is drained to the lowest section of soil or waste stack or stacks served by the vent pipe, plus any additional vent loads connected to the vent stack or stack vent.

(2) For the purposes of Table 7.5.8.4., the length of a stack vent or vent stack shall be its developed length from its lower end to open air.

(3) The minimum size of vent stack or stack vent shall be one-half the size of the soil or waste stack at its base.

(4) A stack vent serving a wet vent stack that is over 4 storeys high shall extend the full size of the wet vent to open air.

(5) Every sanitary building drain shall be provided with at least one vent that is not less than 3 in. in size.

Text · e-Laws consolidated snapshot

Table 7.5.8.4. Size and Developed Length of Stack Vents and Vent Stacks Forming Part of Sentence 7.5.8.4.(1)

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Column 7

Column 8

Column 9

Column 10

Column 11

Column 12

Column 13

Size of Soil or Waste Stack, in.

Total Hydraulic Load Being Vented, fixture units

Water OccupiedArea

Size of Stack Vent or Vent Stack, in.

1¼

1 ½

2

3

4

5

6

8

10

12

Maximum Length of Stack Vent or Vent Stack, m

1¼

2

0.29

9

1½

8

0.25

15

46

10

.29

9

30.5

2

12

0.25

9

23

61

20

.29

8

15

46

3

10

0.15

13

46

317

Not Limited

21

.20

10

33.5

247

53

.25

8

28.5

207

102

.29

7.5

26

189

4

43

0.15

Not Permitted

10.5

76

299

Not Limited

140

.20

8

61

229

320

.25

7

52

195

540

.29

6.5

46

177

5

190

0.15

Not Permitted

25

97.5

302

Not Limited

490

.20

29

76

232

940

.25

16

64

204

1 400

.29

15

58

180

6

500

0.15

Not Permitted

10

39.5

122

305

Not Limited

1 100

.20

8

30.5

94.5

238

2 000

.25

6.5

25.5

79

201

2 900

.29

6

23.5

73

183

8

1 800

0.15

Not Permitted

9.5

29

73

287

Not Limited

3 400

.20

7

22

58

219.5

5 600

.25

6

19

49

186

7 600

.29

5.5

17

43

70.5

10

4 000

0.15

Not Permitted

9.5

24

94.5

292.5

Not Limited

7 200

.20

7

18

73

225.5

11 000

.25

6

15.5

61

192

15 000

.29

5.5

14

55

174

12

7 300

0.15

Not Permitted

9.5

36.5

116

287

13 000

.20

7

28.5

91

219.5

20 000

.25

6

24

76

186

26 000

.29

5.5

22

70

152

15

15 000

0.15

Not Permitted

12

39.5

94.5

25 000

.20

9.5

29

73

38 000

.25

8

24.5

62

50 000

.29

7

22.5

55