NWL Self Lay Addendum June 2015-1

7/21/2019 NWL Self Lay Addendum June 2015-1

http://slidepdf.com/reader/full/nwl-self-lay-addendum-june-2015-1 1/9

NORTHUMBR

Self lay policy

and

Company speto the Code of Practic

– England and Wales

Revision – June 2015

IAN WATER LIMIT

ific addendumfor Self-Laying of Water Mai

2nd Edition) (Published by WR

D

s and Services

c plc)



Northumbrian Water Limited: Adden

Table of Contents

1. Introduction

2. Contacting Northumbria

3. Related OFWAT Docum

4. Addendum Specifics

Part 1 - General

• Ownership of mains

• Ownership of servic

• Responsibility for pr

• Competence of Self

• Contestable and No

• Interfaces with local

Part 2 – Self Lay Procedur

• Initial enquiry

• Design by Develope• Design by NWL

• Construction stage

• Water main installati

Part 3 – Design & Constru

• Design drawings

• Flow and pressure

• Multiple service con

• Meter boxes

•

Service connection t• Data capture/As laid

5. Charges

6. Appendices

All terms in this addendum

England and Wales for th

and National addendum

specified.

dum for the Self Laying of Water Mains and Services

Water Ltd

ents

s

tection of street furniture

Lay Organisations

-Contestable Work

fire authority

s

r/SLO

on

tion Guidance

ections

o the water distribution systemdrawings

will have the same meaning as in the C

Self- Laying of Water Mains and Ser

or Safe Control of Routine Mains Co

Page 2

de of Practice for

ices 2nd Edition

nnections unless




1. INTRODUCTION

Northumbrian Water Ltd (

self lay to Developers and

(SLO’s), while ensuring th

not compromised. As suc

Wales for the Self-Laying

WRc plc.

This addendum, which sho

& the National addendum

additional information and

particular requirements, pr

This addendum came into

lay policy. NWL reserves tnotice.

2. CONTACTING NWL

The NWL area of supply i

area and the southern or E

to the appropriate Develop

Developer Services (Nort

Northumbrian Water LimiteLeat House

Pattinson Road

Washington

Tyne & Wear

NE38 8LB

Tel: 08457 171100

Fax: 0191 4196764

Email: [email protected]

When applying to self-lay nand submit the Self-Lay a

the application is submitte

should accompany the app


WL) is committed to providing a cost ef

their agents, often referred to as Self-

t the standards of installation work and

NWL has adopted the Code of Practi

f Water Mains and Services 2nd Editio

uld be read in conjunction with the Code

for Safe Control of Routine Mains Conn

sets out any variations to the CoP in

cedures and charges that may apply.

effect on 1st June 2015 and supersede

e right to amend the addendum at any

s made up of two regions, the northern

ssex & Suffolk area. Self-lay enquiries s

r Services department as follows:

h) Developer Services (S

d Essex & Suffolk WaterPO Box 969

Chelmsford

Essex

CM2 0XL

Telephone: 0345 60946

Fax: 01268 664802

ew mains and services the Developer/Splication form available on the NWL an

by an SLO a letter of authorisation fr

lication.

Page 3

ective service for

ay Organisations

water quality are

e for England &

as published by

of Practice (CoP)

ections, provides

luding details of

any earlier self-

time without prior

or Northumbrian

hould be directed

uth)

38

O shall completeESW website. If

m the developer




3. RELATED OFWAT DO

Ofwat have published guid

Ofwat website: www.ofwat.

guidance in http://www.ofw

4. ADDENDUM SPECIFIC

CoP Part 1 - General

Ownership of mains (Co

The Developer/SLO re

workmanship for an agree

NWL is 12 months. Within

with the SLO. This is to e

Liability Period to repair an

Ownership of services (C

The Developer/SLO re

workmanship for an agree

connection.

Responsibility for protec

The Developer/SLO rem

including covers, lids, fram

adopted by the party respo

Competence of Self Lay

Only SLOs competent in

permitted to carry out wor

registered and accredited

Scheme (WIRS): www.lloy

Competence of Self Lay

The Developer/SLO shall e

water mains and/or servictraining and practical e

undertaken. Relevant pers

Register’ on www.eusr.co.

Safety and Environment P

carried at all times and sh

demand.

Contestable and Non-co

NWL will carry out work th

including:


UMENTS

nce relating to self-lay activities that ca

gov.uk . This addendum aims to align its

at.gov.uk/developers/connection/selflay/

section 1.2)

ains responsible for any defective

d Defect Liability Period. The Defect L

this period, the Developer must maintain

nsure that the SLO returns to the site

identified defect.

oP section 1.3)

ains responsible for any defective

d Defect Liability Period of 12 months

ion of Street Furniture (CoP section 1

ins responsible for the protection o

es and chambers until such time as th

nsible for its ongoing maintenance

rganisations (CoP section 1.5)

the laying of water mains and servic

on behalf of the Developer. NWL req

with the Lloyds Register Water Ind

sregister.co.uk/schemes/WIRS/

rganisations (CoP section 1.5 (5))

nsure that all staff employed by them for

es shall have an appropriate combinatperience relating to the constructio

onnel shall be registered on the ‘Ener

uk and be in possession of a valid ‘Wat

ssport’ including a National Hygiene Ca

ll be available for inspection by NWL r

testable Work (CoP 1.8)

t may affect water quality to existing cus

Page 4

be found on the

elf with the Ofwat

materials and

iability Period for

their relationship

within the Defect

materials and

from the date of

.4)

street furniture

street has been

e pipes shall be

ires SLOs to be

stry Registration

the installation of

ion of education,activity to be

y & Utility Skills

er Sector Health,

d. Cards shall be

presentatives on

omers,




• Establishing a point

• Designing and instal

• Work on a trunk or s

• Work on a main that

• Work on a main con

• Installation of an off

development

• Service connections

• Service connections

In addition, the following w

• Provision and Install

• Water quality sampli

NWL will install the wate

connections. The SLO sh

connection.

Interfaces with local Fire

Where the Developer/SLOthe designer, they shall

requested to do so by the

behalf of the Developer/SL

CoP Part 2 – Self Lay Pro

Initial enquiry (CoP secti

NWL will provide the p

parameters/constraints to

service layout.

Design by Developer / SL

If the Developer/SLO und

listed in Table 4 of the Cod

Design by NWL (CoP sec

If the Developer/SLO requ

all of the information liste

required design fee.


of connection to the existing network

ling reinforcement work

trategic main

has been subject to recorded supply int

structed of a material requiring specialist

site main intended to be shared with an

to existing off-site mains

greater than 32mm in diameter

rk is non-contestable:

ation of meters

ng and testing

r meters to all wall box, boundary b

ll fit a trickle flow plug on new service pi

Authority (CoP section 1.13)

is responsible for the design of a newbe responsible for all Fire Authority

eveloper/SLO, NWL may consult with

. There will be a charge for this servic

cedures

n 2.2)

int of connection together with any

enable the Developer/SLO to prepar

O (CoP section 2.3.1)

rtakes the design they must submit all

e of Practice.

ion 2.3.2)

sts NWL to undertake the design then

d in Table 5 of the Code of Practice

Page 5

rruptions

attention

nrelated new

ox and manifold

pes at the time of

ains scheme, asliaison. Where

ire Authorities on

.

specific design

the mains and

f the information

they must submit

to NWL with the




Construction stage (CoP

A pre-start meeting shall

the commencement of w

agreement has been comp

Water main installation (

If the site layout changes,

not allow the main to

immediately. No further co

evaluated and approved

construction then see secti

CoP Part 3 – Design & C

3.3 Design drawings

Format of designs (CoP

Wherever possible, site layin .dwg file format compatiagreement.

Design drawing and sup

The design drawing and s

following:

• Notation to indicate

• Notation to indicate

3.4 Design Guidance - G

Location of other apparat

It is the responsibility of thwith all current informationproviders information durin

3.5.1 Design Guidance -

Clearances between maiIn cases where NWL is nwith the designer and NWwater main and proposedfeatures

Flow and pressure (CoP


section 2.4)

e organised and attended by the SLO

rk, following NWL’s confirmation that

leted.

oP section 2.4.2)

round contamination is identified or gro

e constructed as designed, NWL m

nstruction shall take place until the des

by NWL. If ground contamination is

n 3.7.2 of the Code of Practice.

nstruction Guidance

ection 3.3.1)

outs and designs should be submitted oble with AutoCAD (2009 or earlier) or

lementary design information (CoP s

upplementary design information should

esponsibility for construction of service

ervice strips and easements.

neral

us (CoP section 3.4.3)

Developer [designer in the CoP] to prorelating to the location of other existinthe design process

ains

s and proposed properties (CoP 3.5.1 t the designer, the Developer should d

L, an acceptable clearance between throperty constructions, any existing stru

ection 3.5.3.3)

Page 6

nd NWL prior to

he self lay legal

nd conditions do

ust be informed

ign has been re-

identified during

n CD or by emailnother format by

ction 3.3.4)

also include the

onnections

vide the designerutility or service

.1)iscuss and agree

line of the newtures and on site




NWL will provide sufficientthe designer to design a sflow and pressure for watconnection locations.

Multiple Service ConnectNWL’s requirement is that

location of which will be ag

Meter boxes (CoP sectio

NWL’s preference is theshould be a multi depth bmeters (1.5qn) and incorpbox to be used is subject tbox types may be used by

Boundary boxes should bother locations as may beare acceptable.

Service Connections to t

Service connections and t

permits the installation of

properties. The minimum

service pipe is installed fr

Trenches should be leftcompliance with the Water

subject to the relevant notif

Data Capture/’As laid’ Dr

Full postal address and

SLO/Developer prior to

alternatively, at the time th

Before any section of sel

provide 3 copies of ‘as laname, scheme number, d

may also be submitted ele

Final as laid drawings sho

mains and Communicatio

NWL in the format detailed

5. CHARGES

Our standard charges sche

www.eswater.co.uk


flow and pressure at the Point(s) of Constem that meets the minimum statutoryr used for Domestic Purposes at the

ions (CoP Section 3.6.4)separately occupied premises have indi

eed in advance with NWL on a site spe

3.6.5)

combined meter / stop tap boundaryx with plastic surface lid suitable for hrating a stop tap spindle operation. Theapproval by NWL in advance of installa

agreement with NWL in advance.

installed at or adjacent to the roadsidgreed with NWL. Manifold boxes (two,

e Water Distribution System (CoP se

e associated supply pipes are subject to

service connections prior to the compl

equirement for inspection purposes is t

om the main up to and including the

pen for inspection. If the SLO is Wat Supply (Water Fittings) Regulations ca

ication being received by NWL.

wings (CoP section 3.7.5)

meter installation details need to be

WL carrying out a Water Regulatio

Watersafe certificate is provided to NW

laid main is connected to the networ

id’ drawings, clearly marked with SLOte of installation of phase and date of

tronically in the format detailed in sectio

uld be submitted to NWL by the SLO

Pipes by NWL. The drawings should

in section 3.3.1 above.

me is available from our website. www.n

Page 7

ection, to enablerequirements for

proposed service

idual meters, the

ific basis.

ox option – thisusing concentrictype of boundaryion. Other meter

e boundary or infour and six way)

tion 3.7.4)

inspection. NWL

etion of the new

hat the complete

internal stop tap.

ersafe approved,be self certified,

provided by the

s inspection or,

L.

k, the SLO shall

and Developer’ssubmission, this

3.3.1 above.

rior to vesting of

be submitted to

wl.co.uk and




Appendix A – Northern R

Worked example calcula

and asset payment.

Please note this worked ex

that is used to calculate c

only and is simplified.

Variables

Total scheme cost £100,00

Number of properties 100

Years before all properties

Average income per prope

Interest rate for borrowing

Discount rate 3.25%

Long term annual inflationNumber of applicable year

Year to Relevant Annual

31 Mar Revenue Cost

2016 450 10,197

2017 4,929 10,197

2018 8,887 10,197

2019 13,067 10,197

2020 17,495 10,197

2021 21,362 10,1972022 22,300 10,197

2023 22,969 10,197

2024 23,658 10,197

2025 24,368 10,197

2026 25,099 10,197

2027 25,852 10,197

The relevant revenue is t(based on a cumulative oc

received and increased ea


gion Example

ing the relevant deficit, discounted

ample is intended to be an illustration of

arges and the asset payment. As such

0

are chargeable 5

ty £177

.25%

.0%12

Discounted

Annual Relevant Discount Aggregate In

Deficit Deficit Factor Deficit All

9,747 9,747 0.969 9,440

5,268 5,268 0.938 4,941

1,310 1,310 0.909 1,190

(2,871) - 0.880 - 1

(7,299) - 0.852 - 1

(11,166) - 0.825 - 1(12,103) - 0.799 - 1

(12,772) - 0.774 - 1

(13,461) - 0.750 - 1

(14,171) - 0.726 - 1

(14,902) - 0.703 - 1

(15,655) - 0.681 - 1

Relevantdeficit

DADTOTAL

16,324 15,571

e number of properties connected in tupancy) multiplied by the income per pr

h year in line with inflation.

Page 8

ggregate deficit

the methodology

it is an example

come Asset

wance Payment

450 436

,929 4,624

,887 8,074

0,197 8,972

0,197 8,690

0,197 8,4160,197 8,151

0,197 7,895

0,197 7,646

0,197 7,406

0,197 7,172

0,197 6,947

Assetpayment

84,429

he relevant year,perty that will be




Appendix B – Southern R

Worked example calcula

and asset payment.

Please note this worked ex

that is used to calculate ch

Variables

Total scheme cost £100,00

Number of properties 100

Years before all properties

Average income per prope

Interest rate for borrowing

Discount rate 3.25%

Long term annual inflation

Number of applicable year

Year to Relevant Annual

31 Mar Revenue Cost

2016 181 10,197

2017 11,353 10,197

2018 22,286 10,197

2019 22,968 10,197

2020 23,670 10,197

2021 24,380 10,197

2022 25,112 10,1972023 25,865 10,197

2024 26,641 10,197

2025 27,440 10,197

2026 28,264 10,197

2027 29,112 10,197

The projected future revenyear, (based on a cumulati

will be received and increa


egion Example

ing the relevant deficit, discounted

ample is intended to be an illustration of

rges. As such it is an example only and

0

are chargeable 5

ty £208

.25%

.0%

12

Discounted

Annual Relevant Discount Aggregate

Deficit Deficit Factor Deficit

10,016 10,016 0.969 9,700

(1,156) - 0.938 -

(12,089) - 0.909 -

(12,771) - 0.880 -

(13,474) - 0.852 -

(14,184) - 0.825 -

(14,915) - 0.799 -(15,668) - 0.774 -

(16,444) - 0.750 -

(17,244) - 0.726 -

(18,067) - 0.703 -

(18,915) - 0.681 -

Relevantdeficit

DADTOTAL

10,016 9,700

ue is the number of properties connectve occupancy) multiplied by the income

ed each year in line with inflation.

Page 9

ggregate deficit

the methodology

is simplified.

Income Asset

Allowance Payment

181 175

10,197 9,565

10,197 9,264

10,197 8,972

10,197 8,690

10,197 8,416

10,197 8,15110,197 7,895

10,197 7,646

10,197 7,406

10,197 7,172

10,197 6,947

Assetpayment

90,300

d in the relevantper property that

Documents

NWL Self Lay Addendum June 2015-1