International Wastewater Services Flushability IWSFG PAS 3C: 2017 – Flask and Shaker Table Group 2017‐07‐21 version 1 International Wastewater Services Flushability Group 2 IWSFG Part 3C: 2017 – Disintegration Test Methods – Flask and Shaker Table 3 Copyright 2017 4 PUBLIC COMMENT VERSION 5 Copyright Notice 6 This document is copyright‐protected by the International Wastewater Services Flushability Group. 7 While the reproduction of working drafts in any form for use by participants in the standards 8 development process is permitted without prior permission, neither this document nor any extract from 9 it may be reproduced, stored or transmitted in any form for any other purpose without prior written 10 permission from the IWSFG. 11 Once finalized, the IWSFG will permit the downloading and use of the documents without charge for 12 the purposes of determining whether a product is likely to be considered flushable and to be so 13 identified. 14 Forward The International Wastewater Services Flushability Group (IWSFG) is a worldwide coalition of national and regional wastewater services’ associations and organizations and individual wastewater services. The work of preparing the standards is carried out by various drafting groups comprising volunteers designated by the principal and the supporting participants of the group. They participate on a voluntary basis, without remuneration of any kind. The criteria for flushability and the test methods are the product of a global consensus of the coalition members and reflect the hydraulic, mechanical and environmental conditions of drain lines, various onsite treatment wastewater collection and treatment systems as well as those of the receiving waters for treatment plant effluents. The task of the group was to prepare standards reflecting the above purpose. Wastewater services are organizations acting for the public good as a public service. The group expects manufacturers and distributers of their products to act in a socially responsible and environmentally sustainable manner by adhering to the established standards. A i id h ibili h fh l fhid b h bj 15 Copyright 2017 IWSFG Page 1 of 21 International Wastewater Services Flushability IWSFG PAS 3C: 2017 – Flask and Shaker Table Group 2017‐07‐21 version 16 17 Contents 18 1. Introduction .......................................................................................................................................... 4 19 2. Purpose ................................................................................................................................................. 4 20 3. Scope ..................................................................................................................................................... 4 21 4. References ............................................................................................................................................ 5 22 4.1 Normative References .................................................................................................................. 5 23 4.2 Informative Reference or Relevant Annexes ................................................................................ 5 24 5. Terms and Definitions ........................................................................................................................... 5 25 5.1 Unit dose – dry tissues ................................................................... Error! Bookmark not defined. 26 5.2 Unit Size – toilet paper ................................................................... Error! Bookmark not defined. 27 5.3 Unit Size – moist tissues ................................................................. Error! Bookmark not defined. 28 5.4 Unit Size – other products ............................................................. Error! Bookmark not defined. 29 6. Principles ............................................................................................................................................... 5 30 7. Apparatus ............................................................................................................................................. 5 31 8. Preparation ........................................................................................................................................... 6 32 8.1 Sample Acquisition ........................................................................................................................ 6 33 8.2 Number of Test Pieces .................................................................................................................. 6 34 8.3 Sample Preparation ...................................................................................................................... 6 35 8.3.1 Dry tissues: ............................................................................................................................ 6 36 8.3.2 Moist Tissues: ........................................................................................................................ 7 37 8.3.3 Other Products ...................................................................................................................... 7 38 8.4 Apparatus Preparation .................................................................................................................. 7 39 9. Storage and Conditioning ..................................................................................................................... 7 40 9.1 Storage of Samples ....................................................................................................................... 7 41 9.2 Conditioning for the Test .............................................................................................................. 8 42 10. Procedure .......................................................................................................................................... 8 43 10.1 Summary ....................................................................................................................................... 8 44 10.2 Test procedure .............................................................................................................................. 8 45 10.3 Test Termination ........................................................................................................................... 9 46 10.4 Test Results ................................................................................................................................... 9 47 10.5 Calculations ................................................................................................................................... 9 Copyright 2017 IWSFG Page 2 of 21 International Wastewater Services Flushability IWSFG PAS 3C: 2017 – Flask and Shaker Table Group 2017‐07‐21 version 48 11. Acceptance Criteria ......................................................................................................................... 10 49 12. Test Report ...................................................................................................................................... 10 50 13. Precision .......................................................................................................................................... 11 51 Bibliography ................................................................................................................................................ 11 52 Annex 1– Sources of Apparatus .................................................................................................................. 11 53 Annex 2 ‐ Test Report Template ................................................................................................................. 15 54 Annex 3 ‐ Procedure for Pre‐rinsing Test Products for Determining Initial Dry Mass ................................ 16 55 A.3.1 Introduction ............................................................................................................................ 16 56 A.3.2 Test Product Selection ............................................................................................................ 16 57 A.3.4 Toilet and Drain Line Method ................................................................................................. 16 58 A.3.4.1 Equipment ........................................................................................................................... 16 59 A.3.4.2 Procedure ............................................................................................................................ 17 60 A.3.5 Alternative Method ................................................................................................................ 17 61 A.3.5.1 Equipment ........................................................................................................................... 17 62 A.3.5.2 Procedure ............................................................................................................................ 17 63 Annex 4 ‐ Sieving and Recovery of Product Residues ................................................................................. 18 64 A.4.1 Introduction ............................................................................................................................ 18 65 A.4.2 Equipment ............................................................................................................................... 18 66 A.4.3 Procedure