1. BS EN ISO 22391-3 AMD1. Plastics piping systems for hot and cold water installations. Polyethylene of raised temperature resistance (PE-RT). Part 3. Fittings (27th February 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (7 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗