ASME A112.18.2 pdf download Plumbing waste fittings 1 Scope 1.1 This Standard covers plumbing waste fittings of sizes NPS-2 and smaller. 1.2 Plumbing supply fittings are covered by ASME A1 1 2.1 8.1 /CSA B1 25.1 . 1.3 Other devices, e.g., temperature-actuated in-line mixing valves and flexible connectors under continuous pressure, are covered by CSA B1 25.3 or other plumbing...