Utility Installation Guide: Water - Energetics · 2021. 1. 21. · Utility Installation Guide: Water England and Wales When you phone the water emergencies number, the call centre

Utility Installation Guide:Water

www.energetics-uk.com

Practical Guidance and Contractual Requirementsfor England and Wales

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WaterUtility Installation Guide

© Energetics 2019. Utility Installation Guide: Water England and Wales

Copyright © 2019 an unpublished work by Energetics. All rights reserved.

Copyright Copyright © 2019 Energetics. All rights reserved. No part of this publication may be reproduced, transcribed, transmitted, stored in a retrieval system or translated into any language, in any form or by any means mechanical, manual, electronic, magnetic, chemical, optical, including photocopying or otherwise without the prior written permission of Energetics.

Confidentiality This document is the property of Energetics, and is provided on the understanding that its use will be confined to the officers of your company and that no part of its contents will be disclosed to third parties without the prior written consent of Energetics.

Version History

Document version Date Description / reason for modifications

Version 1.0 November 2019 First release of guide

Printing Control This document is uncontrolled when printed. The electronic version of this document is the approved and most current. Any printed version is uncontrolled and may not be current. Please ensure you are referring to the latest version.

Acknowledgements Energetics respectfully acknowledges all trademarks, trade names and other unique identification symbols, whether implied or explicit, used within this document.

Energetics Fenick House Lister Way Hamilton International Technology Park Glasgow G72 0FT

Tel: 03300 587 400 Web: www.energetics-uk.com


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It contains the following sections:

• Water Emergencies, describes what action should be taken and emergency telephone numbers for each of the water authorities.

• Energetics Responsibilities,outlines the responsibilities of the different parties.

• Water Mains – Open Trench, provides information on the tasks Site Developers must do before Energetics begin work.

• Ducted Water Mains, gives instructions to Site Developers on the ducting to use, the depth at which it must be fitted and the fill.

• Pressure Testing and Chlorination of Water Mains, shows a diagram of the process of carrying out these activities.

Water

This document deals with the installation of water services.

• Water Services - Installation, describes the work that must be carried out by Site Developers before Energetics can begin.

• Apartments – External Meter Manifolds, lists the tasks that must be completed when installing external meter manifolds.

• Apartments – Internal Meter Manifolds, lists the work that is needed for installing internal meter manifolds.

• Water Fittings – Sluice Valves & Hydrants, explains the work that must be done for the fitting of sluices and hydrants.

• Meter & Pressure Reducing Valves (PRVs), describe the role of bulk water meters and pressure reducing valves for large scale housing developments.

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When you phone the water emergencies number, the call centre will ask for more information. They will ask:

• Your name and phone number.

• The address or location of the suspected water leak.

Water Emergencies

• Do not enter a trench that is flooded.

• If there are injuries that require a medical response, ring 999 immediately.

• Make the area safe and notify anyone onsite of the situation.

• Notify the relevant water company by telephone on their emergency line. These numbers are provided for each water company on page 67.

• Minimise the exposure of the potable water network and the environment, provided it is safe to do so.

Advice if you Suspect a Water Leak, Loss of Supply or Water Quality Issue

If you can see a water leak on site, loss of supply or water quality issues, phone the 24-hour Regional Water Company emergency number. These are listed on page 6.

• Minimise the discharge of any highly chlorinated water, provided it is safe to do so.

• Maintain control of the incident until the relevant competent persons are on site to take control.

• Assist the relevant competent persons on site if required to do so.

• Severity of leak (trickle, stream of water, flooding, fountain).

• How long has the leak been visible.

• Are any properties affected.


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Regional Water Companies Telephone Numbers

Albion Water Ltd 0800 917 5819

Anglian Water 0800 771 881

Affinity Water 0800 376 5325

Bournemouth Water Ltd 01202 590 59

Bristol Water plc 0345 702 3797

Cambridge Water plc 01223 706 050

Cholderton & District Water Company Ltd 01980 629 203

Dee Valley Water plc 0800 298 7112

Dwr Cymru (Welsh Water) 0800 052 0130

Essex & Suffolk Water Ltd 0800 526 337

Hartlepool Water plc 0800 028 4816

Independent Water Networks Ltd 0290 028 711

Northumbrian Water Ltd 0800 393 084

Peel Water Networks 0845 122 6782

Portsmouth Water plc 023 9247 7999

Scottish Water 0800 0778 778

Severn Trent Water Ltd 0800 783 4444

South East Water Ltd 0333 000 3330

South Staffordshire Water plc 0800 389 1011

South West Water Ltd 0800 230 0561

Southern Water Services Ltd 0800 820 999

SSE Water Ltd 0800 980 1391

Sutton & East Surrey Water plc 01737 772 000

SSE Water Ltd 0800 980 1391

Thames Water Utilities Ltd 0800 714 614

United Utilities Water plc 0800 330 033

Wessex Water Services Ltd 0800 692 0692

Yorkshire Water Services Ltd 0800 573 553

Company Name Telephone

Water Emergencies

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Energetics responsibilities are to:

• Lay all water mains of 63mm diameter and above in trenches pre-excavated by the Site Developer or the Site Developer’s representatives (This shall apply unless specified otherwise in the contract between the Site Developer and Energetics).

• Connect all water services and pipes (25/32mm diameter only). It is the developers responsibility to install pipework from inside the property to the property boundary, allowing sufficient excess pipework to reach the water main.

• Provide and install boundary boxes (up to 25mm only) for each property.

• If the Site Developer has laid the water services, test, connect and commission water services previously laid ‘dead’ by the Site Developer or their representatives (up to 25mm only).

• Provide records. These must be kept on site by the Site Developer and kept up to date with a marked-up copy of a site drawing showing the live water mains and services.

Energetics Responsibilities

Note: In United Utilities and Anglian Water areas, Energetics is responsible for providing boundary boxes, but the Site Developer installs them.

Energetics personnel will not undertake any work beneath scaffolding.

SERVICE PIPE

A-B Communication Pipe

Stopcock or Meter

B-C Supply Pipe

Internal Plumbing

RESPONSIBILITY

OWNERSHIP

LOCAL WATERAUTHORITY

LOCAL WATERAUTHORITYPROPERTY

OWNERPROPERTY

OWNER



OWNERPROPERTY

OWNER

MAINTENANCERESPONSIBILITY

Street boundary

Water main

Boundary of premises

Stopcockor

Meter

B

A

Property C

SERVICE PIPE

A-B Communication Pipe

Stopcock or Meter

B-C Supply Pipe

Internal Plumbing

RESPONSIBILITY

OWNERSHIP



OWNERPROPERTY

OWNER



OWNERPROPERTY

OWNER

MAINTENANCERESPONSIBILITY

Street boundary

Water main

Boundary of premises

Stopcockor

Meter

B

A

Property C

The diagram below summarises the responsibilities of the different parties in the connection of water supplies:


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Unless specified otherwise in the contract, the Site Developer must:

• Excavate trenches to the required level providing the appropriate depth of cover to the top of the pipe, unless otherwise specified in the contract.

• Excavate service joint holes to allow complete access to a depth of 100mm below the bottom of the main.

• Ensure the trenches are excavated so that water mains can be laid in accordance with the SWUK guidelines, as shown below:

Water Mains - Open Trench

© Energetics 2018 20

Part 2: Gas

Open Trench Gas Mains

Unless specified otherwise in their contracts, the Site Developer is responsible for:

• Excavating and backfilling trenches to provide the required depth.

• Providing the required depth of cover to the top of the pipe and adequate fine bedding and main surround.

• Fully surrounding and covering the gas main with a minimum of 150mm of fine fill material above the crown of the main.

• Excavating of service jointing bays.

Energetics will lay gas mains in position in the pre-excavated trenches in accordance with the NJUG guidelines as shown in the diagram below:

Note: Gas mains laid in the roadway must be installed at a depth of 750mm of cover to the finished surface level.

Part 4: Water


• Ensure ground levels are within +150mm and -150mm of the finished levels before Energetics can start work.

• Fully surround and cover the water main with a minimum depth of 150mm fine fill material above the crown of the pipe.

• Position detectable water warning marker tape 150mm to 250mm directly above the water main:

• Backfill the remainder of the trench prior to any pressure testing and chlorination of the water mains.

• Pressure test and chlorinate all water mains that are more than 6 metres in length

and that measure 63mm and above in diameter.

Only materials approved by the adopting Network Operator must be used. The UKWRI and Provider Adoption Drawing stipulate the correct Isolation Valves, Stop Cocks and Meter Covers.

The Site Developer must:

• Install the outside kerb line and define the inner kerb line before Energetics commence work on site.

• Ensure ground levels are within +150mm and -150mm of the finished levels before Energetics can start work.

• Fully surround and cover the water main with a minimum depth of 150mm fine fill material above the crown of the pipe.

• Backfill the remainder of the trench prior to any pressure testing and chlorination of the water mains.

• Pressure test and chlorinate all water mains that are more than 6 metres in length and that measure 63mm and above in diameter.

• Position detectable water warning marker tape 150mm to 250mm directly above the water main:

Note: This diagram is not to scale

Carriageway

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• Install an approved type of utility ducting, that is Rigiduct (Rigiduct is a twin-walled, smooth internal surface, blue in colour).

An example of Rigiduct is shown in the image below:

Ducted Water Mains


Part 4: Water

Ducted Water Mains

It is the Site Developer’s responsibility to:

• Install an approved type of utility ducting, that is Rigiduct. (Rigiduct is a twin-walled, smooth internal surface, blue in colour.)

Do not use corrugated ducting for road crossings.

An example of Rigiduct is shown in the image below:

• Ensure that ducting for mains road crossings is the correct colour, material, and laid at the correct depth and location. The table below shows the minimum mains ducting requirements:

External Diameter of Main Internal Diameter of Duct Depth of Cover

63mm 100mm 900mm

90mm 150mm 900mm

110mm / 125mm 200mm 900mm

160mm/180mm & 250mm 300mm 900mm

315mm 400mm 900mm

• Position water marker tape 150mm to a maximum of 250mm directly above ducts.

• Energetics will provide ducting layouts on a specific water design drawing, or in the case of multi-utility projects, a combined ducting layout drawing will be provided.

• Ensure that ducting for mains road crossings is the correct colour, material, and laid at the correct depth and location. The table below shows the minimum mains ducting requirements:

63mm 100mm 900mm

90mm 150mm 900mm

110mm / 125mm 200mm 900mm

160mm /180mm & 250mm 300mm 900mm

315mm 400mm 900mm

Do not use corrugated ducting for road crossings.

External Diameter of Main Internal Diameter of Duct Depth of Cover

• Position water marker tape 150mm to a maximum of 250mm directly above ducts.

• Energetics will provide ducting layouts on a specific water design drawing, or in the case of multi-utility projects, a combined ducting layout drawing will be provided.


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Pressure Testing and Chlorination of Water Mains

PE / Barrier Pipe Mains

Construction of Main Complete

Fill Main with Mains Water

Swab Main and Flush Out

Pressure Test Main

Chlorinate Main and Leave to Stand for 16 Hours Minimum

Flush with Chlorinated Water and Leave to Stand

for 24 Hours Minimum

Take Sample

Get Sample Results After 3 Days

Sample Passed

Sample Failed

Sample Failed

Connect new main to existing infrastructure within

14 days of sample date (if not connected within 14 days,

main must be �ushed)

Mains Connection

Take Post Connection Sample

Sample Passed

Main Ready for Service Connections

Get Sample Results After 24 Hours

The following flow chart sets out an example pressure testing and chlorination process:

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StreetBoundary

Carriageway

Footpath

Boundaryof Premises

WaterMain

Incorrect Correct

Individual 50mm Blue Duct Required, 1 Pipe, 1 Duct


• Lay the service pipes from inside the building to the highway boundary of the property.

• Ensure that the installed service pipes and fittings must comply with Water Supply (Water Fittings) Regulations 1999.

Water Services - Installation

Whether the Site Developer employs direct staff or contract workers to install the ‘dead’ service pipes, they must:

• Ensure the pipe is a continuously coiled ‘dead’ 25mm diameter service pipe.

• Lay the water service directly into the ground or insert it within a water service duct, approved by the adopting Network Operator.

• Cap or plug pipe ends at all times to prevent contamination caused by groundwater and debris.

• Lay all service pipes with a minimum cover up of 750mm up to the highway boundary.

• Ensure the line of the water service pipes follows the routes shown on the drawing below. Ideally, the service route should be perpendicular from the service entry position of the property to the boundary.

• Ensure the line of the water service is a minimum of 250mm away from other utility services.

• Discard any water service pipes that have kinks, cuts or scratches to a depth greater than 10% of their thickness.

• Provide a minimum of 75mm of fine fill bedding for the water service pipe.

• For service installation in the geographic areas of United Utilities, the installer must be WIAPs approved. Please see United Utilities developer pack for further detail.


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• Install a stop tap where the ‘dead’ water service terminates within the property. The Site Developer must do this before service connection. The diagram below shows this.


• Fully surround and cover the water service with a fine fill material to a minimum of 150mm above the crown of the pipe.

• Place water warning marker tape 150mm to 250mm directly above the water service.

• If the water main is on the other side of the road, lay the service pipes to the near side kerb and install a duct across the road and make sure the ends of the duct are exposed in readiness for Energetics making the connection.

• Ensure the water service pipe is ducted where it enters a building below ground, to where it exits above ground and into the building.

• You must make sure that all ducting is insulated and adequately sealed. See the diagram below:

Ground Level

Solid internal �oor

Sealed

Pipes laid in ductwith insulation

Water Services - Installation

In the case of 600mm service strips, boundary boxes must be placed in an unmade area on private property, as close to the boundary as possible

and not in driveways or cross-over areas where vehicles drive over.

• Provide all lines and levels so that Energetics can fit boundary boxes correctly within 500mm of the property boundary. Boundary boxes must not be installed in driveways or cross-over areas where vehicles are likely to drive over. In the geographic areas of United Utilities and Anglian Water, Energetics will provide the boundary boxes for the Site Developer to install.

• Agree the boundary box location with Energetics and the host water authority prior to installation.

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• Ensure that external port manifolds will be accessible 24 hours a day to all residents for maintenance and meter reading.

• Cap or seal all service pipework.

• Clearly identify each apartment’s service pipe at the boundary prior to connection and installation of the meter.

• Not route service pipes through one property to another.

• Comply with the Water Supply (Water Fittings) Regulation 1999.

• Allow access for a pre-inspection of pipework. Applicable for apartment blocks only.

The diagram below shows the external water meter manifold:

Apartments - Manifolds

Ground level

Supply pipe ducted asit enters the property.Duct should be toaccommodate servicepipe with insulation.

Multi-port externalcontrol box. Must beinstalled as close tothe front of theelevation of theproperty as possible.

External Manifolds Internal Meter Manifolds


Part 4: Water

Apartments – Internal Meter Manifolds


• Ensure that stop taps and water meters are located in a communal area or meter cupboard, that residents can access 24-hours a day for maintenance and meter reading purposes.

• Space internal pipework not less than 100mm apart. This is for maintenance and replacement of stop taps and water meters.

• Provide common access to all pipe runs to each property.


• Carry out all work and use materials that comply with the Water Supply (Water Fittings) Regulation 1999.

• Clearly identify supplies to flatted properties at the meter, prior to the installation of the meter.

The diagram below shows a typical example of the pipe work to be installed by the Site Developer. It shows internal meters within a communal are or meter cupboard.


• Ensure that stop taps and water meters are located in a communal area or meter cupboard that residents can access 24-hours a day for maintenance and meter reading purposes.

• Space internal pipework not less than 100mm apart. This is for maintenance and replacement of stop taps and water meters.

• Provide common access to all pipe runs to each property.


• Comply with the Water Supply (Water Fittings) Regulation 1999.

• Clearly identify supplies to flatted properties at the meter, prior to the installation of the meter.

The diagram below shows a typical example of the pipe work to be installed by the Site Developer. It shows internal meters within a communal area or meter cupboard.

Pipe work to be installed by the developer


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Energetics will:

• Install sluice valves to the water main for future maintenance and isolation purposes.

• Fit to the water main either wash out or fire hydrants for flushing out purposes.

• Install the valves and hydrants.


• Use the valve and hydrant surface box covers supplied by Energetics.

• Install this surface box as part of the permanent reinstatement.

• Ensure that all pipework and materials are stored off the ground in a level, stoned area, away from any possible contamination.

• Cap all pipe ends and store materials on covered pallets to protect against contamination.

The following diagrams show a typical section detail for a sluice valve surface box and a hydrant surface box:

Water Fittings - Sluice Valves & Hydrants

Adjacent�anged�ttings

Ductile andframe marked ‘SV’

Extension spindle(if required byadopting utility)

Gate Valve

Resilient seatgate valve

Split basesection

Wall sections(concrete or

polymer as peradopting utility

speci�cation)

Well compacted�ne�ll

SVSV

The diagram below shows a typical section detail for a hydrant surface box:

Gate Valve

HydrantBlack cap - FixedWhite cap - LooseRed cap - Full bore

80mm ductileiron�angedspacer

Ductile all�anged tee

Well compactedtype 1 �ll



speci�cation)

Split base slab


WO FH

250mm - 300mm from�nished ground level

.

.300mm from back

of Chamber

Lid markedwashout

or �rehydrant

Gate Valve

HydrantBlack cap - FixedWhite cap - LooseRed cap - Full bore

80mm ductileiron�angedspacer

Ductile all�anged tee

Well compactedtype 1 �ll



speci�cation)

Split base slab


WO FH

250mm - 300mm from�nished ground level

.

.300mm from back

of Chamber

Lid markedwashout

or �rehydrant

Sluice Valve Surface Box Detail

Hydrant Surface Box Detail

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Meter & Pressure Reducing Valves (PRVs)

Large scale housing developments may require a district bulk water meter and pressure reducing valve for leakage monitoring. Usually Energetics carries out this work, but it may be done by the host water company in complex circumstances, determined on a case by case basis.

These measure the water usage within a pre-determined districted meter area (DMA).

Bulk Water Meters

These can be installed where high pressure water is reduced down to a lower pressure to help reduce/ minimise leakage within a DMA.

The image below shows a typical bulk water meter and PRV installation:

Pressure Reducing Valves

Energetics Fenick House Lister Way Hamilton International Technology Park Glasgow G72 0FT

TEL: 03300 587 400 www.energetics-uk.com

Documents

Utility Installation Guide: Water - Energetics · 2021. 1. 21. · Utility Installation Guide: Water England and Wales When you phone the water emergencies number, the call centre