The Ontario Building Code | Conversion of Fixture Units to Litres and Gal/min

7.4.10.5. Conversion of Fixture Units to Litres and Gal/min

(1) Except as provided in Sentence 7.4.10.3.(2), where the hydraulic load is to be expressed in litres, fixture unitsshall be converted as follows:

(a) when the number of fixture units is 260 or fewer, the load is 2 360 L, and

(b) when the number of fixture units exceeds 260, the load is 9.1 L for each fixture unit.

(2) Where the hydraulic load is to be expressed in gal/min, fixture units shall be converted in accordance with Table 7.4.10.5.

Table 7.4.10.5.
Maximum Probable drainage Rate, gal/min

Forming Part of Sentence 7.4.10.5.(2)

Item

Column 1

Column 2

Column 3

Column 4

Fixture Units in service

Fixture Units

Fixture Units

Fixture Units

Col. 1

Col. 1 × 10

Col. 1 × 100

1.

100

53

174

900

2.

90

51

164

835

3.

80

49

153

750

4.

70

47

140

680

5.

60

44

128

600

6.

50

41

115

520

7.

40

38

102

435

8.

30

33

88

350

9.

20

27

72

262

10.

10

21

53

174