prEN 806-1

SLOVENSKI STANDARD
01-november-2024
Specifikacije za napeljave za pitno vodo v stavbah - 1. del: Splošno
Specifications for installations inside buildings conveying water intended for human
consumption - Part 1: General
Technische Regeln für Trinkwasser-Installationen - Teil 1: Allgemeines
Spécifications techniques relatives aux installations pour l'eau destinée à la
consommation humaine à l'intérieur des bâtiments - Partie 1: Généralités
Ta slovenski standard je istoveten z: prEN 806-1
ICS:
13.060.20 Pitna voda Drinking water
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2024
ICS 91.140.60 Will supersede EN 806-1:2000
English Version
Specifications for installations inside buildings conveying
water intended for human consumption - Part 1: General
Spécifications techniques relatives aux installations Technische Regeln für Trinkwasser-Installationen -
pour l'eau destinée à la consommation humaine à Teil 1: Allgemeines
l'intérieur des bâtiments - Partie 1: Généralités
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 806-1:2024 E
worldwide for CEN national Members.

Contents Page
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Objectives . 17
5 Graphic symbols and abbreviations . 18
6 Sphere of application of the standard . 53
Annex A (informative) Examples for the use of graphic symbols . 54
Bibliography . 56

European foreword
This document (prEN 806-1:2024) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 806-1:2000.
— complete editorial revision and update;
— inclusion of new terms.
Annex A of this document is informative.
This is the first part of the European Standard EN 806 consisting of 5 parts as follows:
— EN 806-1, General
— EN 806-2, Design
— EN 806-3, Pipe sizing – simplified method
— EN 806-4, Installation
— EN 806-5, Operation and maintenance
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
EN 806-3 is currently being revised and could appear under a new title with the same EN number.
1 Scope
This document specifies requirements for and gives recommendations on the design, installation,
alteration, testing, maintenance and operation of installations inside buildings conveying water intended
for human consumption (hereafter referred to as potable water installations) within buildings and, for
certain purposes, pipework outside buildings but within the premises (see Figure 1).
It covers the system of pipelines, fittings and connected appliances installed for supplying potable water
from the delivery point to the point of use.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 805, Water supply — Requirements for systems and components outside buildings
EN 806 (all parts), Specification for installations inside buildings conveying water intended for human
consumption
ISO 4063, Welding, brazing, soldering and cutting — Nomenclature of processes and reference numbers
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
active media filter
filter which uses special substances or media for altering the properties of water
Note 1 to entry: For further information see EN 14898.
3.2
adjustable control valve
valve for regulating flow, pressure or temperature
3.3
air break to drain
vertical air gap realised by air inlets or full disconnection between the lowest point of the outlet and the
spillover level of the atmospheric drain overflow
Note 1 to entry: For further information see EN 1717.
3.4
air gap
permanent atmospheric separation between the upstream fluid supply and the downstream fluid
Note 1 to entry: For further information see EN 1717.
3.5
air inlet
orifice designed to admit air from the atmosphere into a hydraulic circuit
Note 1 to entry: For further information see EN 1717.
3.6
air lock
zone inside the pipeline where air bubbles can collect and limit water circulation
3.7
anti-pollution check valve
device which allows water to flow just in one direction and prevent water to return back
Note 1 to entry: Anti-pollution check valve is usually called check valve in a short term.
Note 2 to entry: For further information see EN 13959.
3.8
appliance
equipment
device in which the potable water is used and/or is modified e.g. water heater, coffee machine, flushing
cistern
Note 1 to entry: For further information see EN 1717.
3.9
backflow
movement of the fluid from downstream to upstream within an installation
Note 1 to entry: For further information see EN 1717.
3.10
backflow protection device
device which is intended to prevent pollution of potable water by backflow
Note 1 to entry: For further information see EN 1717.
3.11
blending devices
valve which mixes treated water and not treated water for reaching a set value at the outlet
3.12
bonding rail
point of connections of all earthing wires
3.13
bypass pipeline
bypass device
pipeline or device which is connected in parallel with the main pipeline or device
3.14
cavitation
physical phenomenon which occurs when the water pressure falls below the vapour pressure of the
water at a certain temperature
3.15
circulation control valve
valve actuated to control the flow and temperature in a circulation pipeline
3.16
circulation pump
device which ensures water flow in the circulation pipeline
3.17
circulation system
circuit which returns the potable water to maintain the circuit at a set temperature
3.18
cistern
fixed, vented container for holding water at atmospheric pressure
3.19
conditioning agent
substance added to the water for altering its properties (e.g. polyphosphate)
Note 1 to entry: For further information see EN 14812
3.20
control valve
static or automatic valve actuated to control the flow and temperature
3.21
corrosion
physicochemical (often electrochemical) interaction between a material and its environment that results
in changes in the properties of the material, and which may lead to significant impairment of the function
of the material, the environment, or the technical system, of which these form a part
Note 1 to entry: For further information on corrosion on metals see EN 12502 parts 1-5.
3.22
designer
natural or legal person responsible for planning, calculation and performance specification of potable
water installations
Note 1 to entry: Attention is drawn to national or local regulations that can contain requirements for qualification.
3.23
direction of flow
direction of flow during normal operation
3.24
directly heated water heater
water heater in which the thermal energy is transmitted directly to the water via a connecting wall
3.25
discharge pipeline
pipeline which accommodates water discharged from a device or point of an installation
3.26
distributing pipeline
pipeline (other than an overflow pipeline or a flush pipeline) conveying water from
a storage cistern, or from a hot water appliance supplied from a feed cistern, and under pressure from
that cistern
3.27
double feed vented primary circuit
water system in which, the primary circuit is fed independently of the secondary
system
3.28
drain tap
tap fitted to drain the contents of the potable water installation or of parts of it
3.29
drainage connection
pipeline connection to drain
3.30
draw-off point
point in the potable water installation from which potable water can be drawn
3.31
dynamic flow diverter
device that creates a specific pressure loss able to force a flow of water in the connected branch circuit
3.32
dynamic pressure
dynamic flow pressure
pressure at a measuring point in the potable water installation under flow condition
3.33
electrical isolator
device which electrically isolates two metallic pipelines
3.34
expansion group
combination of devices for isolating, protecting against backflow and overpressure for the expansion of
water
Note 1 to entry: For further information see EN 1488.
3.35
expansion joint
fitting which allows expansion of pipeline due to thermal effect
3.36
expansion loop
loop or pipeline configuration which allows expansion of pipeline due to thermal effect
Note 1 to entry: E.g. bellow, omega shape, bends.
3.37
expansion valve
valve for water expansion which protects against overpressure
Note 1 to entry: For further information see EN 1491.
3.38
expansion vessel
device which accommodates expanded water due to thermal effect
3.39
family of protection
general identification of a backflow protection device principle
Note 1 to entry: For further information see EN 1717.
3.40
ferrule
device for connecting a service pipeline to the local main
Note 1 to entry: The device may contain a service stop valve.
3.41
firefighting pipeline
firefighting supply pipeline with extinguishing devices (e.g. hydrants, sprinklers and water curtains)
3.42
fixed point attachment
point where the pipelines are fixed and cannot move
3.43
float-operated valve
valve which opens or closes the flow by a lever or electrical circuit operated by a float
3.44
floor service pipeline
pipeline which branches off from vertical distribution pipelines within a floor and from a floor and/or
from which a single feed pipeline branch
3.45
flow rate
ratio based on the volume of water and time
3.46
flow reducing valve
device for reducing the flow by narrowing the cross section
3.47
flow-through expansion vessel
expansion vessel where water can circulate inside due to a special connection device
3.48
flow velocity
speed of the water in a pipeline
3.49
flushing
process in order to avoid stagnation and/or remove impurities
3.50
guide bracket
fixing element which allow movement in a determined direction
3.51
heat exchanger
device which transfers heat between physically separated circuits
3.52
heat pump
equipment which increases the temperature of the water using electricity or other energy sources
3.53
heat trap
pipeline configuration shaped and dimensioned for avoiding convective heat transfer inside the pipeline
3.54
high-rise building
building of a certain height in which the hydrostatic head is relevant
3.55
hose
flexible pipeline normally made of internal elastomeric material inside a protective metal sleeve
3.56
indirectly heated water heater
water heater in which the thermal energy is transmitted to a heat transfer medium from which the heat
is then transferred to the water to be heated
3.57
installation shaft
structure conduit where pipelines for installation are accommodated
3.58
installer
natural or legal person responsible for the installation, commissioning and maintenance of potable water
installations
Note 1 to entry: Attention is drawn to national or local regulations that can contain requirements for qualification.
3.59
instantaneous water heater
water heater in which the PWC is heated in the flow through
Note 1 to entry: This can be done directly or indirectly.
3.60
intended operation
operation of the potable water installation in accordance with the EN 806 series and EN 1717
3.61
leakage detection appliance
type of equipment for detecting leaks or unexpected misuse of water
3.62
lowest normal service pressure
SPLN
lowest service pressure at the point of connection occurring probably during a period of high
consumption as estimated by the water supplier
3.63
maintenance plan
structured and documented set of tasks that include the activities, procedures, resources and the time
scale required to carry out maintenance
3.64
maximum design pressure
MDP
maximum hydrostatic pressure at which the potable water installation is designed to work
3.65
measuring device
device for measuring parameters e.g. pressure, temperature or volume
3.66
mechanical filter
filter with mesh size 80 µm to 150 µm retaining particles that are bigger than mesh size
Note 1 to entry: For further information see EN 13443-1.
3.67
membrane separation device
filter which uses special membranes for its operation, e.g. microfiltration, ultrafiltration, nanofiltration
Note 1 to entry: For further information see EN 14652.
3.68
motorized valve
valve with an electrical actuator
3.69
neutralization and hardening
chemical method for reducing the free carbonic acid in the water in order to reduce corrosion-potential
of the water
3.70
nitrate removal
chemical method for removing nitrate from water
Note 1 to entry: For further information see EN 15219.
3.71
nominal pressure
PN
maximum hydrostatic pressure at which a component is designed for at a specified temperature
3.72
non-potable water
NPW
water other than potable water
3.73
operating pressure
OP
internal pressure which may occur at a particular time and at a particular point in the potable water
installation
3.74
operator
natural or legal person responsible for ensuring the safe operation and maintenance of the potable water
installation
Note 1 to entry: The operator should be provided for ensuring the safe operation and maintenance with the
necessary information from e.g. installer, designer, water supplier and other parties.
3.75
outlet nozzle
device inserted into the outlet of the draw-off appliances
3.76
overflow pipeline
pipeline to limit the level of the water contained in the cistern by discharging water to drain
3.77
pipe joint
connection between two pipelines
Note 1 to entry: Joints can be obtained using special devices or methods.
3.78
pipework
pipelines, fittings, appliance and/or equipment that transport the potable water to the draw-off points or
the points of use
3.79
point for disposal
point of installation where the discharged water is collected for being evacuated
3.80
point of delivery
location at which the potable water is transferred from the water supplier to the potable water
installation and which is specified by the water supply authorities or regulations
3.81
point of use
point where water is drawn by the user either directly or by connecting an appliance
Note 1 to entry: For further information see EN 1717.
3.82
potable water
PW
water intended for human consumption
Note 1 to entry: Attention is drawn to the definition of potable water in [1], or for nations not covered by the
directive, in national regulations.
Note 2 to entry: The water may also be used for washing, cooking and sanitary purposes.
3.83
potable water installation
installation inside buildings conveying water intended for human consumption within buildings and, for
certain purposes, pipework outside buildings but within the premises
Note 1 to entry: It covers the system of pipes, fittings and connected appliances installed for supplying potable
water. The system begins at the delivery point (specified by the water supplier) and ends at the downstream end of
the potable water installation with an air gap, (e.g. at a kitchen tap) or a protection device, (e.g. at a hose union tap).
3.84
potable water, cold
PWC
cold water intended for human consumption at temperatures ≤ 25 °C
3.85
potable water cold, circulating
PWC-C
cold water intended for human consumption which returns to the water chiller by a pump in the
circulation system
Note 1 to entry: In Type B installations the chiller can also be a cistern or other appliances.
3.86
potable water, hot
PWH
hot or heated water intended for human consumption at temperatures up to the PWH operating
temperature
3.87
potable water, hot, circulating
PWH-C
ot or heated water intended for human consumption which returns to the water heater by means of a
pump in the circulation system
Note 1 to entry: In Type B installations the circulation can also be achieved by gravity.
3.88
pressure boosting station
equipment which increases the water pressure
3.89
pressure gauge
type of instrument which measures pressure
3.90
pressure ratio
ratio between upstream and downstream pressure of a pressure reducing valve
3.91
pressure reducing valve
device which decreases and/or limits pressure to a desired set value
Note 1 to entry: For further information see EN 1567.
3.92
pressure surge
rapid fluctuation of pressure caused by a change in the flow rate over a short period of time
3.93
pressure switch
type of control operated by pressure
3.94
primary circuit
assembly of water fittings in which water circulates between a heat source and a primary heat exchanger
3.95
protection unit
device in combination with other hydraulic components which constitutes the protection against
backflow
Note 1 to entry: For further information see EN 1717.
3.96
return pipeline
pipeline in a hot potable water circuit in which water returns to the water heater or a storage device
3.97
safety device
device which operates when dangerous physical operating conditions occur, e.g. excess pressure or
temperature
3.98
safety group
combination of devices for isolating, protecting against backflow and overpressure
Note 1 to entry: For further information see EN 1487.
3.99
safety thermal cut-out device
device which limits the temperature of the water by turning off the electrical supply with manually reset
3.100
safety valve
valve which protects against overpressure
Note 1 to entry: For further information see EN 1489.
3.101
sampling point
point in the supply pipelines where water can be drawn off for collecting water samples
3.102
scald protection
device or system function for protecting the user from being scalded by hot water
3.103
scale formation
formation of a deposit mainly composed of calcium carbonate on inner surfaces of pipelines and
equipment
3.104
self-priming pump
pump which keeps liquid inside for start up
3.105
service pipeline
pipeline which supplies water from the local main to the potable water installation
Note 1 to entry: For further information see EN 805.
3.106
service pressure
SP
internal pressure delivered at the point of connection to the potable water installation at zero flow in the
service pipeline
Note 1 to entry: For further information see EN 805.
3.107
service stop valve
water supplier’s stop valve, which is the first valve in the service pipeline after or included in the ferrule
3.108
single feed pipeline
single connection pipeline which is leading to one draw-off point
3.109
stop valve
valve intended to facilitate maintenance or servicing of installation parts or appliance
3.110
single-feed vented primary circuit
circuit fed from the secondary system by using a hot water cylinder incorporating a special primary heat
exchanger in an indirect hot water system with a single feed primary circuit
3.111
softening
physical or chemical treatment for reducing the hardness of water
Note 1 to entry: For further information see EN 14743.
3.112
solar heating system
appliance which uses solar energy for heating up the water
3.113
stagnation
situation in the potable water installation with insufficient water exchange rate and a possible impact on
the water quality
3.114
static pressure
gauge pressure at a measuring point in the water supply system when no is water flowing
3.115
storage device
container for water storage for vented or unvented systems
3.116
storage water heaters
water heaters that store the hot water until it is used
3.117
structure
structure, whether of a permanent character or not, and whether movable or immovable, connected to a
public or to a private water supply
Note 1 to entry: E.g. buildings or part of a building providing accommodation, including a terraced house, a semi-
detached house, a detached house, a flat within any nondomestic premises in a block of flats, or any other habitable
building and any caravan, vessel, boat or houseboat, workshops, offices and store rooms.
3.118
supply pipeline
pipeline which conducts water from the supply stop valve to connection draw-off points and connection
points of appliances
3.119
supply stop valve
first stop valve in the premises which controls the downstream supply of the entire potable water
installation (and that can be included in a water meter assembly)
3.120
system test pressure
STP
hydrostatic pressure applied to a potable water installation in order to ensure its integrity and tightness
3.121
tap
valve with an air gap from which potable water is drawn off
3.122
temperature and pressure relief valve
device which protects against overpressure and over temperature
Note 1 to entry: For further information see EN 1490.
3.123
temperature control device
device which limits the increasing temperature of the water in the system
Note 1 to entry: For further information see EN 14597.
3.124
thermal conductivity
thermal conductivity coefficient
λ
rate at which heat flows by conduction in a substance (solid, liquid, gas), per unit area of the substance
crossed by the heat, and divided by the temperature gradient causing the heat transfer
Note 1 to entry: Unit: W/(m · K).
3.125
thermal disinfection
method for disinfecting by increasing the temperature of the water above defined values for a minimum
duration
3.126
thermostat
device which automatically controls or limits the water temperature
3.127
thermostatic mixing valve
device which automatically mixes hot and cold water to a desired set value
Note 1 to entry: For further information see EN 1111.
3.128
trace heating
electrically heated band or device installed on pipelines for reheating the contained potable water hot or
for protecting the water against frost
3.129
type A installation
potable water installation that is under main’s or boosted pressure
3.130
type B installation
part of the system that is not under main's or boosted pressure
3.131
ultraviolet disinfection devices
device which uses UV radiation for microbial disinfection
Note 1 to entry: For further information see EN 14897.
3.132
vertical distribution pipeline
pipeline which leads from floor to floor and from which floor service pipes or single feed pipelines branch
off
3.133
water composition
basic physical and chemical parameters of water that can have an influence on corrosion in a potable
water installation
3.134
water conditioning
water treatment in potable water installations which alters the physical and chemical properties of water
Note 1 to Entry: E.g. mechanical filtration, chemical dosing, nitrate removal, neutralisation-hardening, membrane
processes, softening.
3.135
water hammer
sudden pressure surge, which causes e.g. noise and pressure shocks caused by quick opening or closing
of the water flow
3.136
water heater
equipment for heating water to the set temperature value
3.137
water meter
instrument intended to measure continuously, memorize, and display the volume of water passing
through the measurement transducer at metering conditions
3.138
water meter assembly
set up that comprises the water meter and associated fittings
3.139
water supplier
natural or legal person which is responsible for a public or private water supply and its utilities to which
the potable water installation is connected
4 Objectives
The main objectives of the EN 806 series are to ensure that:
— the deterioration in water quality within the installation is avoided;
— the required flow of water and pressure is available at the draw-off points and at the connection
points of appliances (e.g. water heaters, washing machines);
— the potable water is available at any point of use;
— all parts of the installation do not cause danger to health and do not damage property within
calculated lifetimes;
— the maintenance of the installation meets the functional requirements at all times during its lifetime;
— sound levels are kept to a practicable minimum;
— contamination of the public water supply, undue consumption, leakage and misuse is avoided.
5 Graphic symbols and abbreviations
For ease of reference, certain symbols are illustrated in Table 1, Figure A.1 and Figure A.2.
NOTE Symbol infills can be solid or hatched.
Table 1 — Graphic symbols and abbreviations
d
No. Symbol (S) Graphic symbol Registration Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.1 Pipelines
5.1.1 Ex Part 3: 405 Pipeline The asterix shall be replaced

with:
PW Potable water
PWC Potable water, cold
PWH Potable water, hot
PWH-C Potable water, hot,
circulating
NPW Non potable water
TI Thermal insulation
NTI Non thermal insulation
5.1.2 Ex — Pipeline, PWC,
continuous, 0.35, green
5.1.3 Ex — Pipeline, PWC-C,
dashed, 0.35, darkgreen
5.1.4 Ex — Pipeline, PWH,
dashed, 0.35, red
5.1.5 Ex — Pipeline, PWH-C,
dashdot, 0.35, magenta
5.1.6 Ex — Pipeline, NPW,
continuous, 0.35, blue
5.1.7 Ex Pipeline for potable water,
Part 3: 405
cold, with nominal
diameter 80
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.1.8 Ex Part 3: 405 Pipeline for potable

water, cold, with
inner diameter (nominal
diameter 40 in PE-RT Serie
3,2)
Pipeline for potable water,
5.1.9 Ex Part 3: 405
hot, with nominal
diameter 50 and thermal
insulation
5.1.10 Ex — Pipeline for potable water,

cold, with nominal
diameter 32 and non
thermal insulation
5.1.11 Ex — Pipeline for potable water,

hot, circulating with
nominal diameter 40
5.1.12 Ex — Two pipelines whose No connection between the two
symbols cross each other pipelines exists

5.1.13 Ex Part 3: 405, Two pipelines whose No connection between the two
501 symbols cross each other pipelines exists

5.1.14 Ex Part 3: 405,
T-joint The dot (501) may be omitted.
The diameter of the dot should

be about 5 times the line
(thickest) line width.
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.1.15 Ex Part 3: 444 Connection between two The dot (501) shall not be
pipelines omitted.
The method may be replaced
with two T-joints.
5.1.16 Ex Part 3: 444 Flexible pipeline, hose pipe

5.1.17 Ex — Potable water, cold, hose,

nominal diameter 15
5.1.18 Ex — Reduction of pipeline from

nominal diameter 50 to 40
5.1.19 Ex Part 3: 405, Reduction of pipeline from

501 nominal diameter 32 to 25
5.1.20 Ex — Change of material from

steel to copper
5.1.21 Ex — Change of material from

steel to copper
5.1.22 Ex — Vertical Pipeline with TI

(top view, floor plan)
5.1.23  — Vertical Pipeline with TI
(top view, floor plan)
5.1.24 — — — —
5.1.25 — — — —
5.1.26 — — — —
5.1.27 Ex — Flow to a floor above

d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.1.28 Ex — Flow to a floor below

5.1.29 Ex — Flow from a floor below

5.1.30 Ex — T-joint with one branch
going to a floor above and
the other branch going to a
floor below.
5.1.31 Ex — Pipeline going to a floor
below, with t-joint in
actual floor
5.1.32 Ex — Pipeline going to a floor
above, with t-joint in
actual floor
5.1.33 Ex — Pipeline ending in actual
floor, coming from above
and below, with t-joint in
actual floor
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.1.34 Ex — Pipeline ending in actual
floor, coming from above
and below, with t-joint in
actual floor
5.1.35 Ex — PWH, PWH-C and PWC
vertical pipelines with TI
and indicated direction of
flow (top view, floor plan)
5.1.36 Ex Part 3: 325, Electrically isolating

511 device
5.1.37 S see remark Earth
5.1.38 S Part 3: 531 Expansion loop

5.1.39 S Part 3: 532 Expansion sleeve, sliding

joint
5.1.40 S — Anchor point
5.1.41 S — Guide bracket
5.1.42 S — Wall duct
5.1.43 S — Sealed wall duct
5.1.44 S Part 3: 518 End cap
5.1.45 S — Fall (slope, descent) to the

right
5.1.46 Ex — Fall to the left, 5 %

d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.2 Joints and coupling connections
5.2.1 S Part 3: 501 Joint
5.2.2 Ex Part 3: 501 Joint of specified type The asterix shall be replaced

with:
BR Brazed joint
CP Compression joint
SC Screwed joint
SL Soldering joint
AD Adhesive joint
WE Welded joint
CR Crimped joint
FL Flanged joint
CFL Clamped flanged joint
QC Quick release coupling
QCF Quick release coupling
with fastening thread
QCI Quick release coupling
with two identical parts
PF Push fit
Alternatively, some of the types
may instead be represented by
special symbols, see below
5.2.3 S Part 3: 514 Screwed joint

d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.2.4 S Part 3: 511 Flanged joint

5.2.5 S Part 3: 513 Clamped flanged joint

5.2.6 S Part 3: 515 Welded, brazed or The asterix shall be replaced

soldered joint with a number code in
accordance with ISO 4063.
5.2.7 S Part 3: 583, Quick release coupling

5.2.8 S Part 3: 585 Quick release coupling

with two identical parts
5.3 General purposes valves
5.3.1 S Part 8 Stop valve
5.3.2 Ex — Stop valve Alternative representation for
the detailed representation of

5.3.1 that the stop valve has a
manually operated spindle
5.3.3 S Part 8 Angled valve
5.3.4 S Part 8 Three-way valve

5.3.5 Ex Part 8 Three-way valve used as
mixing valve
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.3.6 S Part 8 Four-way valve
5.3.7 S Part 8 Straight pattern valve EN 1213

5.3.8 S Part 8 Ball valve (spherical valve) EN 13828

5.3.9 S Part 8 Plug-type valve

5.3.10 S Part 8 Gate-type valve

5.3.11 S Part 8 Needle-type valve

5.3.12 S Part 8 Disc or butterfly valve

5.3.13 Ex Part 8 Pressure reducing valve EN 1567
Part 3: 131,
5.3.14 S — Ferrule
5.3.15 S — 90° service stop valve

5.3.16 Ex — Circulation control valve –

fix
5.3.17 Ex — Circulation control valve –
thermal
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.3.18 Ex — Circulation control valve –
electrical
5.3.19 Ex — Valve installed behind a Other symbols are possible.

pre wall or wall
5.4 Outlet taps and related devices
5.4.1 S — Outlet tap
5.4.2 S — Outlet tap in taphole

5.4.3 S — Outlet tap on wall
5.4.4 S — Mixing outlet tap
5.4.5 S — Mixing outlet tap in

taphole
5.4.6 S — Mixing outlet tap on wall

5.4.7 S — Outlet tap with multi Options for * are:

functions
Self-closing (SC) outlet tap
Self-opening and self-closing
(SOC) outlet tap
The functions can be combined
with corresponding outlet taps
and FC and FV. In these cases
the abbreviation SC and SOC can
be added to the relevant symbol
5.4.8 S Part 8 Shower
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.4.9 Ex Part 8 Hand-held shower

5.4.10 S — Flushing cistern (FC) EN 14055

Typical applications for FC are
WC and urinals
5.4.11 S — Pressure flushing valves EN 12541
(FV)
Typical applications for FV are
WC and urinals
5.4.12 Ex Part 3: 444, Valve with quick release
583, 584 coupling and hose
connection
Part 8
5.4.13 Ex Valve with protection unit,
Asterix see 5.5
quick release coupling and
hose connection
5.4.14 Ex — Dynamic flow diverter

5.5 Protection units
S — Protection unit The asterix shall be replaced
with (see EN 1717):
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
AA: Unrestricted air gap
AB: Air gap with overflow
non- circular
(unrestricted)
AC: Air gap with submerged
feed incorporating air
inlet plus overflow
AD: Air gap with injector
AF: Air gap with overflow
circular
AG: Air gap with minimum
circular overflow
BA: Backflow preventer with
controllable reduced
pressure zone
CA: Backflow preventer with
different non controllable
pressure zones
(Class a/Class b)
DA: In line anti-vacuum valve
DB: Pipe interrupter with
atmospheric vent and
moving element
DC: Pipe interrupter with
permanent atmospheric
vent
EA: Controllable antipollution
check valve
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
EB: Non controllable anti-
pollution check valve
EC: Controllable anti-pollution
double check valve
ED: Non controllable anti-
pollution double check
valve
GA: Mechanical disconnector
direct actuated
GB: Mechanical disconnector
hydraulic actuated
HA: Hose union backflow
preventer
HB: Hose union anti-vacuum
valve
HC: Automatic diverter
HD: Hose union anti-vacuum
valve combined with a
check valve
LA: Pressurized air inlet valve
LB: Pressurized air inlet valve
combined with a check
valve located downstream
a
5.6
Safety devices and Protection devices and associated components

5.6.1 S Part 8 Expansion valve or EN 1491 or EN 1489
Pressure safety valve
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
5.6.2 S Part 8 Temperature control T for temperature

devices and temperature
EN 14597
limiters for heat
generating systems
5.6.3 Ex — Combined temperature T for temperature
and pressure relief valve
P for pressure
EN 1490
b
5.6.4 S — Unrestricted air gap, EN 1717, EN 13076
Family A, Type A (AA)
b
5.6.5 S — Air gap with overflow non EN 1717, EN 13077
circular (unrestricted),
Family A, Type B (AB)
b
5.6.6 S — Air gap with submerged EN 1717, EN 13078
feed incorporating air inlet
plus overflow,
Family A, Type C (AC)
b
5.6.7 S — Air gap with injector, EN 1717, EN 13079
Family A, Type D (AD)
b
5.6.8 S — Air gap with overflow EN 1717, EN 14622
circular,
Family A, Type F (AF)
b
5.6.9 S — Air gap with minimum EN 1717, EN 14623
circular overflow,
Family A, Type G (AG)
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
b
5.6.10 S — Backflow preventer with EN 1717, EN 12729
controllable reduced
pressure zone,
Family B, Type A (BA)
b
5.6.11 S — Backflow preventer with EN 1717, EN 14367
different non-controllable
pressure zone, Class a,
Family C, Type A (CA)
b
5.6.12 S — Backflow preventer with EN 1717, EN 14367
different non-controllable
pressure zone, Class b,
Family C, Type A (CA)
b
5.6.13 S — In line anti-vacuum valve, EN 1717, EN 14451
Family D, Type A (DA)
b
5.6.14 S — Pipe interrupter with EN 1717, EN 14452
atmospheric vent and
moving element,
Family D, Type B (DB)
b
5.6.15 S — Pipe interrupter with EN 1717, EN 14453
permanentatmospheric
vent,
Family D, Type C (DC)
b
5.6.16 S — Controllable antipollution EN 1717, EN 13959
check valve,
Family E, Type A (EA)
b
5.6.17 S — Non controllable EN 1717, EN 13959

antipollution check valve,
incl. cartridge,
Family E, Type B (EB)
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
b
5.6.18 S — Controllable antipollution EN 1717, EN 13959

double check valve,
Family E, Type C (EC)
b
5.6.19 S — Non controllable EN 1717, EN 13959

antipollution double check
valve,
Family E, Type D (ED)
b
5.6.20 S — Mechanical disconnector EN 1717, EN 13433
direct actuated,
Family G, Type A (GA)
b
5.6.21 S — Mechanical disconnector EN 1717, EN 13434
hydraulic actuated,
Family G, Type B (GB)
b
5.6.22 S
— Hose union backflow EN 1717, EN 14454
preventer,
Family H, Type A (HA)
b
5.6.23 S — Hose union anti-vacuum EN 1717, EN 15096
valve,
Family H, Type B (HB)
b
5.6.24 S — Automatic diverter, EN 1717, EN 14506
Family H, Type C (HC)
b
5.6.25 S
— Hose union anti-vacuum EN 1717, EN 15096
valve combined with a
check valve,
Family H, Type D (HD)
d
Symbol (S) Registration
No. Graphic symbol Description
Remarks or abbreviations
normative or No.
example (Ex) ISO 14617
informative
b
5.6.26 S — Pressurized air inlet valve, EN 1717, EN 14455
Family L, Type A (LA)
b
5.6.27 S — Pressurized air inlet valve EN 1717, EN 14455

combined with a check
valve located downstream,
Family L, Type B (LB)
5.6.28 Ex  — Combined stop and check

valve (EA)
b
5.6.29 Ex — Combined stop and check Alternative representation for
valve (EA) the detailed representation of

5.6.28 that the stop valve has a
manually operated spindle
5.6.30 S  — Air break to drain EN 1717

5.6.31 S — Test cock EN 1717
5.6.32 S — Sampling cock EN 1717

5.6.33 S — Strainer EN 1717
5.6.34 S — Strainer with drain valve EN 1717

5.7 Water conditioning units
5.7.1 Ex 5671 Chemical dosing unit EN 14812
...