51. Isolated dwelling with a pressurized water system: When a privy is used for an isolated dwelling supplied by a pressurized water pipe, grey water must be purified by a septic tank referred to in section 10 or section 11, which must be connected to a seepage bed in accordance with Divisions V and VII, except for the minimum capacity of the septic tank, which in that case must be 2.3 m3, and the available area of the disposal site of the seepage bed must comply with the standards in the following table, according to the number of bedrooms:
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Number Minimum
of bedrooms available area
(square metres)
1 14
2 20
3 30
4 40
5 50
6 60
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When a privy is used for another building supplied by a pressurized water pipe, grey water must be purified by a septic tank referred to in section 10 or section 11, which must be connected to a seepage bed in accordance with Divisions V and VII, except for the minimum capacity of the septic tank, which in that case must be 2.3 m3, and the available area of the disposal site of the seepage bed must comply with the standards in the following table, according to the total daily flow:
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Total daily flow (litres) Minimum available area
(square metres)
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0 to 540 14
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541 to 1080 20
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1081 to 1620 30
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1621 to 2160 40
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2161 to 2700 50
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2701 to 3240 60
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Section 29 applies, with the necessary modifications, to the computation of the available area mentioned in the first and second paragraphs.