This Standard covers plumbing waste fittings of sizes NPS-2 and smaller. Plumbing supply fittings are covered by ASME A112.18.1/CSA B125.1. This Standard is identical to CSA B125.2-05, Plumbing Waste Fittings. This joint Standard was developed in response to an industry request for a Standard for testing plumbing waste fittings that would be acceptable in both Canada and the United States.