Code of Practice for Water Infrastructure

1 Code of Practice for Water Infrastructure Connections and Developer Services Design and Construction Requirements for Self-Lay Developments July 2020 (Revision 2) Document IW-CDS-5020-03 IW-CDS-5020-03 IW-CDS-5020-03 (Revision 2 2020) IW-CDS-5020-03 (Revision 2 2020) i SCOPE This Code of Practice outlines acceptable typical design and construction details that are required by Irish Water for the provision of Water supply pipes and related Infrastructure in Self-Lay Developments which are to be connected to the Irish Water Network. It shall be used in conjunction with the associated Design Risk Assessments that have been developed which identify the risks that designers shall take into account in the detailed design of the Water supply pipes and related Infrastructure to be connected to the Irish Water Network.

2 The pipes and related Infrastructure to be put in place within Developments shall comply fully with this Code of Practice . Ultimate responsibility (including, but not limited to any losses, costs, demands, damages, actions, expenses, negligence and claims) for the detailed design, construction and provision of such pipes and related Infrastructure shall rest entirely with the Developer, his/her Designer(s), Contractor(s), or other related party. Irish Water assumes no responsibility for and gives no guarantees, undertakings or warranties in relation to the pipes and related Infrastructure to be provided in accordance with this Code of Practice . No part of the Code of Practice shall be reproduced or transmitted in any form or stored in any retrieval system of any nature without the written permission of Irish Water as copyright holder, except as agreed for use.

3 This Code of Practice shall be used in conjunction with current Connection and Developer Services Standard Details. Standard Details can be found on the Irish Water website at Revision Log Date Details of Revision Revision Author Approver December 2016 Initial Issue 0 T OC M OD December 2017 General Revision (See Appendix D) 1 T OC M OD July 2020 General Revision (See Appendix C) 2 T OC M OD IW-CDS-5020-03 (Revision 2 2020) ii Background Technical Documentation was developed by Irish Water s Connection and Developer Services which outlines the requirements for Water services Infrastructure within Developments. The Technical Documentation comprises Codes of Practice and Standard Details. These provide Irish Water s requirements to Developers in the provision of Water Infrastructure that is to be installed by Self-Lay methods in Developments and that would be connected to Irish Water s networks and subsequently vested in Irish Water .

4 The Technical Documentation outlines design and construction requirements to ensure consistency in the provision of materials, equipment, workmanship, etc. They will also provide the basis for developers detailed design proposals for Water supply Infrastructure , leading to the provision of Infrastructure that is suitable for connection to Irish Water s networks and easy operation and maintenance. The Technical Documents are based on best Practice within the Water industry. They take account of the experience of Local Authorities in the provision of these services to new Developments. This document (IW-CDS-5020-03) comprises the Code of Practice for Water Infrastructure and outlines design and construction for developers.

5 It shall be read in conjunction with its associated Design Risk Assessment (IW-CDS-5020-04). The Standard Details for Water (IW-CDS-5020-01) and its associated Design Risk Assessment (IW-CDS-5020-02) are published and available on the Irish Water website at IW-CDS-5020-03 (Revision 2 2020) iii TABLE OF CONTENTS Glossary of Terms and Definitions 1 Part 1 General 9 Introduction 9 Statutory Relevance 9 Options for Connection Installation 10 Connection Procedures 10 Protection of Water Quality 11 Responsibility of Irish Water 13 Application for a Conformance Certificate 13 Conformance Certificate 16 Connection of Development to Irish Water Network 17 Vesting 17 Defects Liability Period 18 Hygiene Requirements During Defects Liability Period & Remedial Work 19 Water Audit Prior to Defects Liability Period Termination 20 Final Inspection at Defects Liability Termination 21 Completion

6 Certificate 21 Statutory and Other Consents 22 Fire Authority Liaison 22 Regulations 23 Standards 23 Civil Engineering Specification for the Water Industry (CESWI) 24 IW-CDS-5020-03 (Revision 2 2020) iv Standard Details 24 Temporary Water Supply Connection for Construction Purposes 24 Extensions to Undeveloped Contiguous Areas 25 Part 2 General Design Requirements and Submissions 26 Introduction 26 General Design Requirements 26 Design Submissions 27 Drawings, Calculations and Design Information 29 Hydraulic Modelling 31 General Minimum Requirements 32 Part 3 Design Requirements 34 Compliance 34 Reliability and Design Objectives 34 Materials General Requirements 35 Structural Design and Integrity Specific Requirements 36 Layout of Works 37 Separation Distances 42 sizing of Water Mains 43 General 43 Water Demand Calculations 44 Service Connections to Individual Premise sizing and General Requirements 45 Materials Selection.

7 Mains and Service Connections 47 pipe Joints 49 IW-CDS-5020-03 (Revision 2 2020) v General 49 Jointing of Polyethylene Pipes 50 Auditing and Testing of Polyethylene pipe Joints 50 Depth of Cover 53 Roadway/Footway Surface Reinstatement 54 Boosted Water Supplies 54 Boundary Boxes 56 Meters 57 General 57 domestic Meters 58 Meters for Commercial Premises 59 Bulk Meters 59 Fittings 61 General 61 Sluice Valves 61 Butterfly Valves 62 Scour Valves 63 Hydrants (80mm) 64 Air Valves 65 Other Fitting Materials 67 Pressure Reducing/Sustaining Valves 68 Hydrant, Air Valve, Sluice Valve and Scour Valve Chambers 69 Water Meter Chambers 72 IW-CDS-5020-03 (Revision 2 2020) vi Pressure Reducing/Sustaining Valve Chambers 74 Scour Chambers 75 Washout Hydrants 76 Indicator Marker Plates and Posts 77 Warning Tape 77 Existing Utilities 78 Environmental Considerations 78 Working Near Existing Pipes (Notifications and Separation Distances)

8 80 Water Storage 81 Water Management and Conservation 83 Part 4 Construction Requirements 84 Construction General Requirements 84 Transportation, Storage, Handling and Use of Materials 85 Location of Other Utilities 86 Trench Widths 86 Trench Base 87 Anchor/Thrust/Support Blocks 87 Cleaning Pipes 88 pipe Bedding, Haunch and Surrounds 89 Backfill 90 Testing and Commissioning 92 General 92 Cleansing of Pipes 92 IW-CDS-5020-03 (Revision 2 2020) vii Pressure Testing 93 General 93 Testing of Ductile Pressure Pipelines 93 Testing of Polyethylene Pipelines 95 Swabbing after Testing 96 Disinfection 96 Disposal of Water 97 Flushing 98 Water Quality Sampling and Testing 98 Connection to the Water Network 99 Final Flushing of Water Mains 100 Service Connection to Water Supply Distribution System 100 Final Documents 102 Repairs, Hygiene Requirements 103 Part 5 Booster Pumping Stations.

9 Kiosks and Ancillary Works 104 Introduction 104 Booster Pump Station Design Submission Requirements 105 Booster Pump Stations Technical Requirements 105 Booster Station Pump Types and their Requirements 106 Booster Station Testing and Commissioning 107 Booster Station Pump Efficiency 107 Booster Station Pressure Control 108 Flow Metering 108 IW-CDS-5020-03 (Revision 2 2020) viii Kiosk Requirements 108 Structure Enclosures 111 Cable Ducts and Chambers 111 General Electrical Requirements 113 Cables 114 Cable Installation 116 General 116 Glanding 116 Termination 116 Junction Boxes 116 Identification of Wiring 117 Control Panels General Requirements 117 Form 4 Control Panel Compartment Additional Requirements 118 Incoming Section 119 Control Circuit Supply 119 Motor Starter Compartments 120 Earthing and Bonding 120 Earth Electrodes 120 Bonding 121 Control Philosophy 121 Testing 121 Abnormal Operation

10 122 Power Failure 122 IW-CDS-5020-03 (Revision 2 2020) ix Pump Failure 122 Telemetry 122 Dial Out Alarm 123 Operation and Maintenance Manual 124 Appendix A Specification for Boundary Box and Fittings 125 Appendix B Standards Referenced in the Water Code of Practice 129 Appendix C Amendments Associated with change from Revision 1 (December 2017) to Revision 2 (July 2020) 136 IW-CDS-5020-03 (Revision 2 2020) 1 Glossary of Terms and Definitions In this document, the following terms and definitions apply - the Act means the Water Services Act 2007 2014; Accessories means all Manholes, Chambers, tanks, fittings, valves, or any machinery or other apparatus which is designed or adapted for use in connection with the use or maintenance of the Works; Applicant means a Developer who has made an application for a connection to Irish Water s Network; Application to Connect means an application by applicant Developer for a connection to Irish Water s Network; Backfill means suitable material that is used to replace excavated material around a structure or that is used in a pipe trench to replace excavated material above the granular surround of the pipe to the underside of the roadway/footway construction or the underside of the top-soil reinstatement in a green area as set out in this Code of Practice .