DN15 Polished Stainless Steel Pipe for Hygienic Process Systems - China Steel Pipe, Steel Tube | Made-in-China.com
Schedule 5S Pipe 1/2 Inch (DN15 mm) – Pipe Standard And Piping Information
MECCANIXITY Tee Pipe Fitting G1/2 Female Thread DN15 1/2" ID Socket, 3-Way PVC Adapter Socket Slip Connector for Water Pipes Home Industrial, White, Pack of 4 - Amazon.com
NPS - 'Nominal Pipe Size' and DN - 'Diametre Nominal'