41. BS EN 898. Chemicals used for treatment of water intended for human consumption. Sodium hydrogen carbonate. (27th May 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (21 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
42. BS EN 899. Chemicals used for treatment of water intended for human consumption. Sulphuric acid. (4th June 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
43. BS EN 936. Chemicals used for treatment of water intended for human consumption. Carbon dioxide. (25th February 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (17 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
44. BS EN ISO 10304-4. Water quality. Determination of dissolved anions by liquid chromatography of ions. Part 4. Determination of chlorate, chloride and chlorite in water with low contamination (6th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (23 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
45. BS EN ISO 15874-1 AMD1. Plastics piping systems for hot and cold water installations. Polypropylene (PP). Part 1. General (17th June 2021) 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) ↗
46. BS EN ISO 15874-2 AMD2. Plastics piping systems for hot and cold water installations. Polypropylene (PP). Part 2. Pipes (18th June 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (9 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
47. BS EN ISO 15874-3 AMD2. Plastics piping systems for hot and cold water installations. Polypropylene (PP). Part 3. Fittings (26th November 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
48. BS EN ISO 15875-2 AMD2. Plastics piping systems for hot and cold water installations. Crosslinked polyethylene (PE-X). Part 2. Pipes (27th February 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (11 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
49. BS EN ISO 15875-3 AMD1. Plastics piping systems for hot and cold water installations. Crosslinked polyethylene (PE-X). Part 3. Fittings (27th February 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (9 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
50. BS EN ISO 15875-3 AMD2. Plastics piping systems for hot and cold water installations. Crosslinked polyethylene (PE-X). Part 3. Fittings (27th November 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗