Must conform to the requirements of Canada Standards Association Standard B66 and must be marked to indicate conformance with CSA B66
Prefabricated tanks must be installed according to manufacturer’s specifications. Ex. a tank must be installed not deeper than the depth specified by the manufacturer
The tank must not be installed in an area where vehicles can drive over the top of the tank
Piping
Article 8.7.3.3. specifies that distribution pipes for leaching beds must be not less than 3-inch trade size for gravity flow systems and 1-inch trade size for pressurized systems. The pipe most commonly used for gravity flow systems is either a 3-inch or 4-inch trade size PVC pipe, perforated at the 4,6, and 8 o’clock positions
The pipe should have an indicator strip in the 12 o’clock position to permit the alignment of all pipes and ensure perforations and positioned correctly
Pipes and fittings for pressurized systems must be strong enough to withstand pressure
Fittings are potential sources of failure, it is advisable to use as few as possible
Fill Materials
Septic stone must be washed and free of fine material
Fines should be less than 1% of total mass of the product
Stone layer should be covered with geo-textile to ensure pore spaces are not plugged
For a raised leaching bed, fill material should be uniformly graded, fine-to-medium sand with T-time ranging between 5 and 15 min/cm.
Uniformly graded soil is ideal because it does not compact over time whereas well graded soil will
Fill material with a T-time greater than 20 min/cm is not recommended for raised leaching beds and mantles, and can be difficult to install.
