Div. B › Part 8 › 8.7 › 8.7.2 — Design and Construction Requirements

8.7.2.2 — Distribution Pipes within Leaching Beds

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(1) Sentence (2) applies to the design and construction of a leaching bed with distribution pipes used within the leaching bed.

(2) The header line and distribution pipes within a leaching bed shall be designed and constructed so that they can be detected by,

(a) magnetic means,

(b) means of a 14 gauge TW solid copper light coloured plastic coated tracer wire, or

OBC Definitions

Defined terms on this page

distribution pipe

means a line or lines of perforated or open jointed pipe or tile installed in a leaching bed for the purpose of distributing effluent from a treatment unit to the soil, as defined in Part 8 of Division B, or leaching bed fill in the leaching bed.

header

means a vent pipe that connects two or more vent stacks or stack vents to open air.

header line

means a line of pipe with watertight joints installed in a sewage system for the purpose of distributing effluent from a treatment unit to the distribution pipe in a leaching bed.

leaching

means dispersal of liquid by downward or lateral drainage or both into permeable soil, as defined in Part 8 of Division B, or leaching bed fill.

leaching bed

means an absorption system constructed as absorption trenches or as a filter bed, located wholly in ground or raised or partly raised above ground, as required by local conditions, to which effluent from a treatment unit is applied for treatment and disposal and that is composed of, (a)the soil, as defined in Part 8 of Division B, leaching bed fill or other filter media that is contained between the surface on which the sanitary sewage is applied and the bottom of the bed, (b)the leaching chamber or the distribution pipe and the stone or gravel layer in which the distribution pipe is located, and (c)the backfill above the distribution pipe or the leaching chamber, including the topsoil and sodding or other anti-erosion measure, and the side slopes of any portion elevated above the natural ground elevation.

construct

to do anything in the erection, installation, extension or material alteration or repair of a building and includes the installation of a building unit fabricated or moved from elsewhere; Act

construction

has a corresponding meaning to “construct”; Act

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