AWWA Comment Period on ANSI/AWWA B114 – Reverse Osmosis and Nanofiltration Systems for Water Treatment December 17, 2021 AWWA’s Comment Period closes on January 31, 2022. Send comments to: Jason Hrdlicka 303.347.6285 phone The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes. Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal - American Water Works Association . The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal - American Water Works Association . SCOPE This standard delineates minimum requirements for reverse osmosis (RO) and nanofiltration (NF) membrane systems for water and reclaimed water treatment systems. MAJOR REVISIONS Major revisions made to the standard in this edition include the following: 1. Remove membrane integrity testing equipment requirements (Sec 4.2.1). 2. Add membrane pressure vessels or other housings as required equipment (Sec 4.2.1). 3. Provide predicted permeate water quality and pressures over the predicted life of the membrane (Sec 4.3.1). 4. Remove membrane integrity testing description requirements by the supplier (Sec 4.3.1). 5. Remove automatic integrity testing description prior to manufacturing (Sec 4.3.2). 6. Add certificates of compliance as option for factory quality control testing prior to startup (Sec 4.3.3). 7. Water quality data usage revised from “required or optional” to design as needed basis (Sec 4.4.6). 8. Remove membrane integrity testing requirements (Sec 4.5.1). 9. Revise normalizations adjustments requirements to be in accordance with ASTM D4516 (Sec 4.5.1). 10. Clarify design requirements for pressure ratings and temperature variations of products and components (Sec 4.6.2 and Sec 4.6.3). 11. Revised material requirements for support systems (Sec 188.8.131.52). 12. Revised to include provisions for disposal of test water during demonstration testing (Sec 5.4.3) and performance testing (Sec 5.4.4).