Bsi bs en 00805 2000

BRITISH STANDARD

Water supply Ð
Requirements for
systems and components
outside buildings

The European Standard EN 805:2000 has the status of a
British Standard

ICS 23.040.01; 91.140.60

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

BS EN
805:2000


BS EN 805:2000

National foreword

This British Standard is the official English language version of EN 805:2000.
The UK participation in its preparation was entrusted by Technical Committee
B/504, Water supply, to Subcommittee B/504/1, Systems and components outside
buildings, which has the responsibility to:
Ð aid enquirers to understand the text;
Ð present to the responsible European committee any enquiries on the
interpretation, or proposals for change, and keep the UK interests informed;
Ð monitor related international and European developments and promulgate
them in the UK.
A list of organizations represented on this subcommittee can be obtained on request
to its secretary.
Presumption of conformity to European legislative requirements
When the reference to this European Standard has been published in the Official
Journal of the European Union (OJ), under the terms of the Public Procurement
and Works Directives, which are transposed into UK law by the Utilities Contracts
Regulations 1996, the Public Supply Contracts Regulations 1991 and the Public
Works Contracts Regulations 1991 and:
ªsubject to ..., the technical specifications which the work or works to be carried
out under a public works contract shall be defined by reference to any European
specifications which are relevantº,
this standard should be called up in specifying all qualifying contracts.
Outside the scope of the Public Procurement Directive (PPD), and the UK
Regulations transposing the PPD, this standard has no mandatory application,
unless called up within a contract, other than as representing currently accepted
good practice.
Representation of good practice
International co-operation in the development of European Standards inevitably
requires compromise in the course of reaching agreement. The UK was prominent
in the development of EN 805:2000 and, despite some reservations, voted in favour
of its acceptance at CEN formal vote. Any future development of the standard will

build upon the shared agreement of its current contents.
However, the current contents should not be taken to represent the full body of
good practice guidance that exists on installation methods. Reference may also be
made to documentation developed by UK Water Companies, which in turn may
reference accepted sector and professional publications.

This British Standard, having
been prepared under the
direction of the Sector
Committee for Building and Civil
Engineering, was published under
the authority of the Standards
Committee and comes into effect
on 15 September 2000
 BSI 09-2000

ISBN 0 580 36369 4

Amendments issued since publication
Amd. No.

Date

Comments


BS EN 805:2000

Interpretation
The UK Technical Committee offers the following advice in respect of the contents

of this standard.
1. Water for fire-fighting
Subclause 5.3.2 of this document specifies that water for fire-fighting purposes
should be determined in accordance with national legislation or local regulations.
There is currently no national legislation or local regulations in the UK determining
the quantity of water to be provided for fire-fighting but attention is drawn to the
national guidance document on the provision of water for fire-fighting published
jointly by the Local Government Association and Water UK in December 1998 and
available for download from the Water UK internet site at
/>2. Service objectives
Clause 6 of this document requires the water supplier to define the levels of service
to be achieved at the point of connection to the consumer's installation.
For water suppliers in England and Wales minimum levels of service are set by
legislation in the Water Supply and Sewerage Services (Customer Services
Standards) Regulations 1989.
3. Rehabilitation
Due to the rapid development of rehabilitation techniques the document gives no
detailed requirements for the renovation of mains. It is important to note the use of
the word ªrelevantº in clause 7.
4. General dimensions for product standards Ð Dimensions
Subclause 9.3.1 of this document specifies two series of nominal sizes (DN) for
components in the range 20 mm to 4 000 mm for internal (DN/ID) and external
diameter (DN/OD).
The subclause refers specifically to requirements to be observed in the drafting of
product standards and therefore does not preclude the acceptance of any sizes
which may appear in such product standards.

Cross-references
The British Standards which implement international or European publications
referred to in this document may be found in the BSI Standards Catalogue under the

section entitled ªInternational Standards Correspondence Indexº, or by using the
ªFindº facility of the BSI Standards Electronic Catalogue.
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii, the
EN title page, pages 2 to 64, an inside back cover and a back cover.
The BSI copyright notice displayed in this document indicates when the document
was last issued.

 BSI 09-2000

i


ii

blank


(1

(8523($167$1'$5'
1250((8523e(11(
(8523b,6&+(1250

-DQXDU\

,&6

(QJOLVKYHUVLRQ

:DWHUVXSSO\5HTXLUHPHQWVIRUV\VWHPVDQGFRPSRQHQWV
RXWVLGHEXLOGLQJV
$OLPHQWDWLRQHQHDX([LJHQFHVSRXUOHVUpVHDX[
H[WpULHXUVDX[EkWLPHQWVHWOHXUVFRPSRVDQWV

:DVVHUYHUVRUJXQJ$QIRUGHUXQJHQDQ
:DVVHUYHUVRUJXQJVV\VWHPHXQGGHUHQ%DXWHLOHDX‰HUKDOE
YRQ*HElXGHQ

7KLV(XURSHDQ6WDQGDUGZDVDSSURYHGE\&(1RQ-XQH
&(1PHPEHUVDUHERXQGWRFRPSO\ZLWKWKH&(1&(1(/(&,QWHUQDO5HJXODWLRQVZKLFKVWLSXODWHWKHFRQGLWLRQVIRUJLYLQJWKLV(XURSHDQ
6WDQGDUGWKHVWDWXVRIDQDWLRQDOVWDQGDUGZLWKRXWDQ\DOWHUDWLRQ8SWRGDWHOLVWVDQGELEOLRJUDSKLFDOUHIHUHQFHVFRQFHUQLQJVXFKQDWLRQDO
VWDQGDUGVPD\EHREWDLQHGRQDSSOLFDWLRQWRWKH&HQWUDO6HFUHWDULDWRUWRDQ\&(1PHPEHU
7KLV(XURSHDQ6WDQGDUGH[LVWVLQWKUHHRIILFLDOYHUVLRQV(QJOLVK)UHQFK*HUPDQ
$YHUVLRQLQDQ\RWKHUODQJXDJHPDGHE\WUDQVODWLRQ
XQGHUWKHUHVSRQVLELOLW\RID&(1PHPEHULQWRLWVRZQODQJXDJHDQGQRWLILHGWRWKH&HQWUDO6HFUHWDULDWKDVWKHVDPHVWDWXVDVWKHRIILFLDO
YHUVLRQV
&(1PHPEHUVDUHWKHQDWLRQDOVWDQGDUGVERGLHVRI$XVWULD%HOJLXP&]HFK5HSXEOLF'HQPDUN)LQODQG)UDQFH*HUPDQ\*UHHFH
,FHODQG,UHODQG,WDO\/X[HPERXUJ1HWKHUODQGV1RUZD\3RUWXJDO6SDLQ6ZHGHQ6ZLW]HUODQGDQG8QLWHG.LQJGRP

(8523($1 &200,77(( )25 67$1'$5',=$7,21
&20,7e (8523e(1 '( 1250$/,6$7,21
(8523b,6&+(6 .20,7(( )h5 125081*

&HQWUDO6HFUHWDULDWUXHGH6WDVVDUW%%UXVVHOV

‹&(1

$OOULJKWVRIH[SORLWDWLRQLQDQ\IRUPDQGE\DQ\PHDQVUHVHUYHG
ZRUOGZLGHIRU&(1QDWLRQDO0HPEHUV

5HI1R(1(


3DJH
(1

&RQWHQWV
)RUHZRUG  
,QWURGXFWLRQ  


6FRSH 



1RUPDWLYHUHIHUHQFHV  











'HILQLWLRQV 
3UHVVXUHV  
6\VWHP 
&RPSRQHQWV  
'LDPHWHUV  
,QVWDOODWLRQ  
+\GUDXOLFGHVLJQ  
6WUXFWXUDOGHVLJQ 



$SSOLFDWLRQRIVWDQGDUGVDQGUHJXODWLRQV  







5HTXLUHPHQWVIRUZDWHUVXSSO\V\VWHPV 
:DWHUTXDOLW\ 
'HVLJQOLIH  
'HPDQGIRUZDWHU 
6\VWHPVHFXULW\ 



6HUYLFHREMHFWLYHV 



5HKDELOLWDWLRQ  












'HVLJQ  
'HVLJQREMHFWLYHV 
3HDNIORZIDFWRUV 
+\GUDXOLFGHVLJQ  
6WUXFWXUDOGHVLJQ 
6\VWHPOD\RXW  
3URWHFWLRQDJDLQVWDJJUHVVLYHHQYLURQPHQW  
5HVHUYRLUV 
3XPSLQJVWDWLRQV  
'RFXPHQWDWLRQ  

















*HQHUDOUHTXLUHPHQWVIRUSURGXFWVWDQGDUGV  
*HQHUDO  
0DWHULDOV 
'LPHQVLRQV  
6WUXFWXUDOGHVLJQ 
0HFKDQLFDOUHTXLUHPHQWV  
:DWHUWLJKWQHVV  
-RLQWV 
3URWHFWLYHPHDVXUHV  
'XUDELOLW\ 
7HVWPHWKRGV  
,QWHUFRQQHFWLRQRISURGXFWV  
4XDOLW\FRQWURO  
0DUNLQJ 

‹%6,

3DJH
(1










,QVWDOODWLRQ  
*HQHUDOUHTXLUHPHQWV 
3LSHWUHQFKHV  
,QVWDOODWLRQRISLSHOLQHFRPSRQHQWV  
3LSHMRLQWV  
3URWHFWLRQDJDLQVWFRUURVLRQDQGFRQWDPLQDWLRQ 
(PEHGPHQWDQGPDLQEDFNILOO  
5HFRUGVRIWHVWVGXULQJLQVWDOODWLRQ  






7HVWLQJRISLSHOLQHV  
*HQHUDOUHTXLUHPHQWV 
6DIHW\  
3UHVVXUHWHVW  








'LVLQIHFWLRQ 
*HQHUDO 
3UHSDUDWLRQIRUGLVLQIHFWLRQ  
6HOHFWLRQRIGLVLQIHFWDQW  
'LVLQIHFWLRQSURFHGXUHV 
0LFURELRORJLFDOFOHDUDQFHDQGUHSRUWLQJ 



$GGLWLRQDOUHTXLUHPHQWV 





2SHUDWLRQ  
,QVSHFWLRQDQGPRQLWRULQJ 
0DLQWHQDQFH  



8SGDWLQJRIGRFXPHQWDWLRQ  

$QQH[$LQIRUPDWLYH
*XLGDQFHWR(1  
$QQH[%LQIRUPDWLYH
$GHYLDWLRQV 
$QQH[&LQIRUPDWLYH
%LEOLRJUDSK\  

‹%6,


3DJH
(1

)RUHZRUG
7KLV (XURSHDQ 6WDQGDUG KDV EHHQ SUHSDUHG E\ 7HFKQLFDO &RPPLWWHH &(17&  :DWHU VXSSO\ WKH
VHFUHWDULDWRIZKLFKLVKHOGE\$)125
7KLV(XURSHDQ6WDQGDUGVKDOOEHJLYHQWKHVWDWXVRIDQDWLRQDOVWDQGDUGHLWKHUE\SXEOLFDWLRQRIDQLGHQWLFDOWH[W
RUE\HQGRUVHPHQWDWWKHODWHVWE\-XO\DQGFRQIOLFWLQJQDWLRQDOVWDQGDUGVVKDOOEHZLWKGUDZQDWWKHODWHVW
E\-XO\
$FFRUGLQJ WR WKH &(1&(1(/(& ,QWHUQDO 5HJXODWLRQV WKH QDWLRQDO VWDQGDUGV RUJDQL]DWLRQV RI WKH IROORZLQJ
FRXQWULHVDUHERXQGWRLPSOHPHQWWKLV(XURSHDQ6WDQGDUG$XVWULD%HOJLXP&]HFK5HSXEOLF'HQPDUN)LQODQG
)UDQFH*HUPDQ\*UHHFH,FHODQG,UHODQG,WDO\/X[HPERXUJ1HWKHUODQGV1RUZD\3RUWXJDO6SDLQ6ZHGHQ
6ZLW]HUODQGDQGWKH8QLWHG.LQJGRP

‹%6,


3DJH
(1

,QWURGXFWLRQ
,Q VSHFLI\LQJ WKH UHTXLUHPHQWV RI WKLV VWDQGDUG GXH UHJDUG KDV EHHQ WDNHQ RI WKH LPSRUWDQFH RI D UHOLDEOH DQG
VDIHVXSSO\RIZDWHUIRUKXPDQFRQVXPSWLRQDVZHOODVIRUWKHSXUSRVHRIWUDGHLQGXVWU\DJULFXOWXUHDQG
ILUHILJKWLQJ
7KH ZLGHO\ YDU\LQJ ZDWHU VXSSO\ OHJLVODWLYH UHTXLUHPHQWV SRSXODWLRQV VRFLDO DQG FOLPDWLF FRQGLWLRQV DFURVV
(XURSHKDYHDOVREHHQWDNHQLQWRDFFRXQW
7KLV VWDQGDUG GRHV QRW PDNH DQ\ LPSOLFDWLRQ ZLWK UHJDUG WR RZQHUVKLS RI RU UHVSRQVLELOLW\ IRU SLSHV RU RWKHU
DSSDUDWXVLQWKHVXSSO\V\VWHP

‹%6,


3DJH
(1

 6FRSH
7KLVVWDQGDUGVSHFLILHV
£ JHQHUDO UHTXLUHPHQWV IRU ZDWHU VXSSO\ V\VWHPV RXWVLGH EXLOGLQJV VHH )LJXUH
 LQFOXGLQJ SRWDEOH ZDWHU
PDLQV DQG VHUYLFH SLSHV VHUYLFH UHVHUYRLUV RWKHU IDFLOLWLHV DQG UDZ ZDWHU PDLQV EXW H[FOXGLQJ WUHDWPHQW
ZRUNVDQGZDWHUUHVRXUFHVGHYHORSPHQW
£ JHQHUDOUHTXLUHPHQWVIRUFRPSRQHQWV
£ JHQHUDO UHTXLUHPHQWV IRU LQFOXVLRQ LQ SURGXFW VWDQGDUGV ZKLFK PD\ LQFOXGH VSHFLILFDWLRQV ZKLFK DUH PRUH
VWULQJHQW
£ UHTXLUHPHQWVIRULQVWDOODWLRQVLWHWHVWLQJDQGFRPPLVVLRQLQJ
7KHUHTXLUHPHQWVRIWKLVVWDQGDUGDSSO\WR
£ WKHGHVLJQDQGFRQVWUXFWLRQRIQHZZDWHUVXSSO\V\VWHPV
£ WKHH[WHQVLRQRIVLJQLILFDQWDUHDVIRUPLQJDFRKHUHQWSDUWRIDQH[LVWLQJZDWHUVXSSO\V\VWHP
£ VLJQLILFDQWPRGLILFDWLRQDQGRUUHKDELOLWDWLRQRIH[LVWLQJZDWHUVXSSO\V\VWHPV

127(
,WLVQRWLQWHQGHGWKDWH[LVWLQJZDWHUVXSSO\V\VWHPVDUHWREHDOWHUHGWRFRPSO\ZLWKWKLVVWDQGDUGSURYLGHGWKDW
WKHUHDUHQRVLJQLILFDQWGHWULPHQWDOHIIHFWVRQZDWHUTXDQWLW\VHFXULW\UHOLDELOLW\DQGDGHTXDF\RIWKHVXSSO\

.H\


)LHOGRIDSSOLFDWLRQRIWKLVVWDQGDUG

)LJXUH)LHOGRIDSSOLFDWLRQRIWKLVVWDQGDUG
‹%6,


3DJH
(1

 1RUPDWLYHUHIHUHQFHV
7KLV(XURSHDQ6WDQGDUGLQFRUSRUDWHVE\GDWHGRUXQGDWHGUHIHUHQFHSURYLVLRQVIURPRWKHUSXEOLFDWLRQV7KHVH
QRUPDWLYHUHIHUHQFHVDUHFLWHGDWWKHDSSURSULDWHSODFHVLQWKHWH[WDQGWKHSXEOLFDWLRQVDUHOLVWHGKHUHDIWHU)RU
GDWHG UHIHUHQFHV VXEVHTXHQW DPHQGPHQWV WR RU UHYLVLRQV RI DQ\ RI WKHVH SXEOLFDWLRQV DSSO\ WR WKH (XURSHDQ
6WDQGDUGRQO\ZKHQLQFRUSRUDWHGLQLWE\DPHQGPHQWRUUHYLVLRQ)RUXQGDWHGUHIHUHQFHVWKHODWHVWHGLWLRQRIWKH
SXEOLFDWLRQUHIHUUHGWRDSSOLHV
(1 6WUXFWXUDO GHVLJQ RI EXULHG SLSHOLQHV XQGHU YDULRXV FRQGLWLRQV RI ORDGLQJ  3DUW  *HQHUDO
UHTXLUHPHQWV
(1:DWHUVXSSO\5HTXLUHPHQWVIRUV\VWHPVDQGFRPSRQHQWVIRUWKHVWRUDJHRIZDWHU
(1*HQHUDOFULWHULDIRUFHUWLILFDWLRQERGLHVRSHUDWLQJSURGXFWFHUWLILFDWLRQ
(1*HQHUDOFULWHULDIRUFHUWLILFDWLRQERGLHVRSHUDWLQJTXDOLW\V\VWHPFHUWLILFDWLRQ
,62 5XEEHU YXOFDQL]HG RU WKHUPRSODVWLF  'HWHUPLQDWLRQ RI KDUGQHVV KDUGQHVV EHWZHHQ ,5+' DQG
,5+'


(1,624XDOLW\V\VWHPV0RGHOIRUTXDOLW\DVVXUDQFHLQGHVLJQGHYHORSPHQWSURGXFWLRQLQVWDOODWLRQDQG
VHUYLFLQJ
(1,624XDOLW\V\VWHPV0RGHOIRUTXDOLW\DVVXUDQFHLQSURGXFWLRQLQVWDOODWLRQDQGVHUYLFLQJ

 'HILQLWLRQV
)RUWKHSXUSRVHVRIWKLVVWDQGDUGWKHIROORZLQJGHILQLWLRQVDSSO\

3UHVVXUHV
)RUWKHGHVLJQDWLRQRISUHVVXUHVLQ(QJOLVK)UHQFKDQG*HUPDQVHHWDEOHDQGDQQH[$

‹%6,


3DJH
(1
7DEOH'HVLJQDWLRQRISUHVVXUHVLQ(QJOLVK)UHQFKDQG*HUPDQ
(QJOLVK

)UHQFK

*HUPDQ

'3

GHVLJQSUHVVXUH

SUHVVLRQGHFDOFXOHQ
UpJLPHSHUPDQHQW

6\VWHPEHWULHEVGUXFN

0'3

PD[LPXPGHVLJQ
SUHVVXUH

SUHVVLRQPD[LPDOHGH
FDOFXO

K|FKVWHU
6\VWHPEHWULHEVGUXFN

6\VWHP

673

V\VWHPWHVWSUHVVXUH

SUHVVLRQG¶pSUHXYHGX
UpVHDX

6\VWHPSUIGUXFN

UHODWHG

3)$

DOORZDEOHRSHUDWLQJ
SUHVVXUH

SUHVVLRQGH
IRQFWLRQQHPHQW
DGPLVVLEOH

]XOlVVLJHU
%DXWHLOEHWULHEVGUXFN

30$

DOORZDEOHPD[LPXP
RSHUDWLQJSUHVVXUH

SUHVVLRQPD[LPDOH
DGPLVVLEOH

K|FKVWHU]XOlVVLJHU
%DXWHLOEHWULHEVGUXFN

&RPSRQHQW

3($

DOORZDEOHVLWHWHVW
SUHVVXUH

SUHVVLRQG¶pSUHXYH
DGPLVVLEOHVXUFKDQWLHU

]XOlVVLJHU
%DXWHLOSUIGUXFNDXIGHU

%DXVWHOOH

UHODWHG

23

RSHUDWLQJSUHVVXUH

SUHVVLRQGH
IRQFWLRQQHPHQW

%HWULHEVGUXFN

6\VWHP

63

VHUYLFHSUHVVXUH

SUHVVLRQGHVHUYLFH

9HUVRUJXQJVGUXFN

UHODWHG

$EEUHYLDWLRQD

D

9DOLGIRUDOOODQJXDJHYHUVLRQV


DOORZDEOHPD[LPXPRSHUDWLQJSUHVVXUH30$

PD[LPXPSUHVVXUHRFFXUULQJIURPWLPHWRWLPHLQFOXGLQJVXUJHWKDWDFRPSRQHQWLVFDSDEOHRIZLWKVWDQGLQJLQ
VHUYLFH

DOORZDEOHRSHUDWLQJSUHVVXUH3)$

PD[LPXPK\GURVWDWLFSUHVVXUHWKDWDFRPSRQHQWLVFDSDEOHRIZLWKVWDQGLQJFRQWLQXRXVO\LQVHUYLFH

DOORZDEOHVLWHWHVWSUHVVXUH3($

PD[LPXPK\GURVWDWLFSUHVVXUHWKDWDQHZO\LQVWDOOHGFRPSRQHQWLVFDSDEOHRIZLWKVWDQGLQJIRUDUHODWLYHO\VKRUW
GXUDWLRQLQRUGHUWRHQVXUHWKHLQWHJULW\DQGWLJKWQHVVRIWKHSLSHOLQH

GHVLJQSUHVVXUH'3

PD[LPXP RSHUDWLQJ SUHVVXUH RI WKH V\VWHP RU RI WKH SUHVVXUH ]RQH IL[HG E\ WKH GHVLJQHU FRQVLGHULQJ IXWXUH
GHYHORSPHQWVEXWH[FOXGLQJVXUJH

PD[LPXPGHVLJQSUHVVXUH0'3

PD[LPXP RSHUDWLQJ SUHVVXUH RI WKH V\VWHP RU RI WKH SUHVVXUH ]RQH IL[HG E\ WKH GHVLJQHU FRQVLGHULQJ IXWXUH
GHYHORSPHQWVDQGLQFOXGLQJVXUJHZKHUH
£ 0'3LVGHVLJQDWHG0'3DZKHQWKHUHLVDIL[HGDOORZDQFHIRUVXUJH
£ 0'3LVGHVLJQDWHG0'3FZKHQWKHVXUJHLVFDOFXODWHG

‹%6,

3DJH
(1

RSHUDWLQJSUHVVXUH23

LQWHUQDOSUHVVXUHZKLFKRFFXUVDWDSDUWLFXODUWLPHDQGDWDSDUWLFXODUSRLQWLQWKHZDWHUVXSSO\V\VWHP

SUHVVXUH]RQHV
DUHDVRISUHVVXUHUDQJHVZLWKLQDZDWHUVXSSO\V\VWHP

VHUYLFHSUHVVXUH63