IAPMO IGC 345-20a covers DN 40 to DN 200 or 1-1/2 to 8 NPS polypropylene Drain, Waste and Vent (DWV) pipe with a mineral filled core and polypropylene fittings intended for use in commercial and residential applications and specifies requirements for materials, physical characteristics, performance testing, and markings.PP pipe and fittings covered by this standard include(a) Jointsi. integral elastomeric ring seal socket; andii. butt fusion;(b) PP pipes and fittings joined with components of other plastics and non-plastics materials;(c) Soil and waste discharge pipework for the conveyance of domestic waste waters (low and high temperature);(d) ventilation pipework associated with; and(e) rainwater pipework within the building structure.