1. Discharge system for buildings

    System of pipes, fittings, accessories and joints used to collect and drain waste water and rainwater from a building; it comprises discharge pipes, stack ventilation and rainwater pipes, installed within the limits of a building or attached to the building.

2. Sewer

    System of pipes designed to collect waste water and rainwater from buildings and surface water and to convey them to the point of disposal or treatment.

3. Cast iron

   Alloy of iron and carbon in which graphile can be present in different forms.

4. Pipe

  Casting of uniorm bore, straight in axis, normally having plain ends but which can also be socketed.

5. Fitting

   Cast iron component, other than a pipe, which allows a deviation, a charge of direction or diameter, including flanged and access components.

6. Accessory

   Any casting other than a pipe or fitting used in a pipeline, e.g. inspection/junction chambers.

7. Joint

   Connection between the ends of pipes and/or fittings, including the coupling or clamping component, with sealing effected by elastomeric gasket.

8. Nominal size

     An alphanumeric designation of size for components of a pipework system, which is used for reference purposes. It comprises the lotters DNfollowed by a dimensionless whole number which is indirectly related to the physical size, in millimeters, of the bore or outside diameter of the end connections.

9. Length

     Effective length of a pipe or fitting.