SIST EN 14055:2018
(Main)WC and urinal flushing cisterns
WC and urinal flushing cisterns
This European Standard specifies design, performance requirements and the test methods for WC and urinal flushing cisterns with flushing mechanism, inlet valve and overflow.
This document covers flushing cisterns designed to be connected to drinking water installations inside buildings.
This standard does not cover automatic valveless siphon flushing cisterns for flushing urinals.
NOTE Flushing cisterns for one-piece WCs and close-coupled suites are covered by EN 997.
Spülkästen für WC-Becken und Urinale
Diese Europäische Norm legt konstruktive und funktionelle Eigenschaften sowie Prüfverfahren für Spülkästen für WC Becken und Urinale mit Spülmechanismus, Füllventil und Überlauf fest.
Dieses Dokument gilt für Spülkästen, die ständig an die Trinkwasser Installationen in Gebäuden angeschlossen sind.
Diese Norm gilt nicht für Automatikspülkästen ohne Ablaufventil nach dem Saugheberprinzip zur Spülung von Urinalen.
ANMERKUNG Spülkästen für Einstück-WCs und WC-Kombinationen werden durch EN 997 abgedeckt.
Réservoirs de chasse d'eau pour WC et urinoir
La présente Norme européenne spécifie les caractéristiques relatives à la conception et à la performance ainsi que les méthodes d'essai applicables aux réservoirs de chasse pour WC et urinoirs comportant un mécanisme de chasse, un robinet de remplissage et un trop-plein.
La présente Norme européenne ne couvre que les réservoirs de chasse devant être raccordés à des installations d'eau potable dans les bâtiments.
Cette norme ne couvre pas les réservoirs de chasse automatiques sans siphon pour le rinçage des urinoirs.
NOTE Les réservoirs des WC monobloc et des ensembles WC à réservoirs attenant sont traités dans EN 997.
Izplakovalniki stranišč in pisoarjev
Ta evropski standard določa zasnovo, zahteve glede zmogljivosti in preskusne metode za izplakovalnike stranišč in pisoarjev z mehanizmom za izplakovanje, dovodnim ventilom ter prelivom.
Ta dokument obravnava izplakovalnike, ki so namenjeni priključitvi na omrežje s pitno vodo v stavbah.
Ta standard ne obravnava samodejnih sifonskih izplakovalnikov brez ventilov za pisoarje z izplakovanjem.
OPOMBA: Izplakovalniki za enodelne straniščne školjke in prigrajene naprave so obravnavani v standardu EN 997.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
1DGRPHãþD
SIST EN 14055:2011+A1:2015
,]SODNRYDOQLNLVWUDQLãþLQSLVRDUMHY
WC and urinal flushing cisterns
Spülkästen für WC-Becken und Urinale
Réservoirs de chasse d'eau pour WC et urinoir
Ta slovenski standard je istoveten z: EN 14055:2018
ICS:
91.140.70 Sanitarne naprave Sanitary installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 14055
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 91.140.70 Supersedes EN 14055:2010+A1:2015
English Version
WC and urinal flushing cisterns
Réservoirs de chasse d'eau pour WC et urinoir Spülkästen für WC-Becken und Urinale
This European Standard was approved by CEN on 14 April 2018.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14055:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification . 8
5 Characteristics and test methods for type 1 products . 9
5.1 Design . 9
5.1.1 Flushing cistern equipment . 9
5.1.2 Water supply connection. 9
5.1.3 Supply piping . 9
5.1.4 Removable parts . 9
5.1.5 Connecting dimensions . 9
5.1.6 Flush pipes . 11
5.2 Hydraulic and mechanical characteristics . 13
5.2.1 Flush volume . 13
5.2.2 Water-saving devices . 14
5.2.3 Flush rate and impact force . 14
5.2.4 Overflow . 15
5.2.5 Inlet valve opening characteristics for water saving flushing . 16
5.2.6 Safety margin – dimension “c” . 16
5.2.7 Backflow prevention, air gap, safety margin – dimension “a” . 17
5.2.8 Outlet valve leaktightness . 17
5.2.9 Outlet valve reliability . 17
5.2.10 Operating force . 17
5.2.11 Durability . 17
5.3 Test methods . 18
5.3.1 General . 18
5.3.2 Flush volume . 18
5.3.3 Flush rate . 19
5.3.4 Determination of the overflow capacity . 23
5.3.5 Inlet valve opening characteristics . 24
5.3.6 Determination of dimension “c” . 24
5.3.7 Determination of dimension “a” . 24
5.3.8 Outlet valve leak tightness . 24
5.3.9 Outlet valve reliability test . 25
5.3.10 Operating force . 25
5.3.11 Impact force . 27
6 Functional characteristics and test methods for type 2 products . 31
6.1 Inlet valve . 31
6.2 Backflow prevention . 31
6.3 Marking of flushing cistern . 31
6.4 Warning pipe and overflow provision . 31
6.5 Flush volume . 31
6.5.1 Full flush . 31
6.5.2 Reduced flush . 32
6.6 Flush rate . 32
6.7 Physical endurance and leakage of flushing device . 32
6.8 Chemical endurance of flushing device . 32
6.9 Durability. 32
6.10 Test methods . 32
6.10.1 Inlet valve tests . 32
6.10.2 Warning pipe and overflow provisions . 33
6.10.3 Flush volume test . 33
6.10.4 Flush rate test . 34
6.10.5 Physical endurance and leakage test of flushing device . 35
6.10.6 Chemical endurance test of flushing device . 36
6.10.7 Requirements for compatibility testing of type 2 products . 36
7 Characteristics and test methods for type 3 products . 37
7.1 Characteristics and test methods. 37
7.2 Adjustment . 37
8 Acoustic characteristics . 37
9 Dangerous substances . 37
10 Marking . 37
11 Assessment and verification of constancy of performance – AVCP . 39
11.1 General . 39
11.2 Type testing . 40
11.2.1 General . 40
11.2.2 Test samples, testing and compliance criteria . 40
11.3 Factory production control (FPC) . 43
11.3.1 General . 43
11.3.2 Equipment . 43
11.3.3 Raw materials and components . 43
11.3.4 Product testing and assessment . 43
11.3.5 Non-complying products . 43
11.3.6 Corrective action . 44
Annex ZA (informative) Relationship between this European Standard and the
requirements of Regulation (EU) No. 305/2011 . 45
ZA.1 Scope and relevant characteristics . 45
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 46
ZA.3 Assignment of AVCP tasks . 46
Bibliography . 48
European foreword
This document (EN 14055:2018) has been prepared by Technical Committee CEN/TC 163 “Sanitary
appliances”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2019 and conflicting national standards shall be
withdrawn at the latest by July 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14055:2010+A1:2015.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
For relationship with EU Construction Products Regulation, see informative Annex ZA, which is an
integral part of this document.
The main changes introduced in EN 14055:2010+A1:2015 were the following:
a) introduction of a new Annex ZA in accordance with the latest template (in the format of TF N 687
rev 1 of 2015-06-02);
b) modification of the marking of products;
c) editorial modifications as agreed between representatives of EU/DG Growth, CEN/TC 163 and FECS
on 2016-07-07 in Brussels for citation of standard in OJEU.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard specifies design, performance characteristics and the test methods for WC and
urinal flushing cisterns with flushing mechanism, inlet valve and overflow.
This document covers flushing cisterns designed to be connected to drinking water installations inside
buildings.
This standard does not cover automatic valveless siphon flushing cisterns for flushing urinals.
NOTE Flushing cisterns for one-piece WCs and close-coupled suites are covered by EN 997.
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 997, WC pans and WC suites with integral trap
EN 1717, Protection against pollution of potable water in water installations and general requirements of
devices to prevent pollution by backflow
EN 13407:2015, Wall-hung urinals - Functional requirements and test methods
EN 14124, Inlet valves for flushing cisterns with internal overflow
BS 1212-2:1990, Float operated valves - Specification for diaphragm type float operated valves (copper
alloy body) (excluding floats)
BS 1212-3:1990, Float operated valves - Specification for diaphragm type float operated valves (plastics
bodied) for cold water services only (excluding floats)
BS 1212-4:2016, Float operated valves - Specification for compact type float operated valves for WC
flushing cisterns (including floats)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
valve-type flushing cistern
cistern with integral valve outlet device, for storage and discharge of a defined volume of flushing water
for removal of excrement from a WC pan
3.2
valveless-type flushing cistern
cistern with integral syphonic actuated outlet device, for storage and discharge of a defined volume of
flushing water for removal of excrement from a WC pan
Note 1 to entry: Both types of flushing cisterns are available, as detailed in Figure 1 below.
Wall-hung independent low-level
Built-in independent
Wall-hung independent mid-level
Wall-hung independent high-level
One-piece integral (with WC pan)
Close-coupled
Figure 1 — types of flushing cisterns
3.3
close-coupled multiple use flushing cistern
close-coupled flushing cistern for use with different WC pans
3.4
independent flushing cistern
flushing cistern mounted separately from a WC pan or urinal
3.5
outlet valve
mechanism for opening and closing the outlet orifice of the flushing cistern
3.6
operating mechanism
mechanism to open, and if applicable, close the outlet valve
3.7
flush pipe
connecting pipe between a flushing cistern’s outlet and a WC’s or urinal's inlet
3.8
overflow
device enabling release of excess water from a flushing cistern when water reaches a pre-determined
level
3.9
inlet valve
valve that controls and shuts off the flow of water into a flushing cistern
3.10
overflow level
water level corresponding to the upper edge of the overflow or to the lower edge of the overflow notch
3.11
maximum water level
highest water level reached after flow stabilisation, in the event of continuous supply, as a result of
malfunction of the inlet valve
3.12
critical water level
highest water level in any part of the appliance, 2 s after the supply is cut off
3.13
residual water level
water level after a full flush is completed
3.14
adjustable residual water level
water level in a cistern, after (uninterrupted) flushing, when an outlet mechanism can be adjusted to
the elevated residual water level
3.15
meniscus level
level resulting from surface tension of water during overflowing
3.16
nominal water level
water level when a flushing cistern is filled to the nominal flush volume
3.17
nominal flush volume
volume of water indicated, when a flushing cistern is filled to the nominal water level
3.18
flush volume
volume of water discharged from the flushing cistern during a flush cycle
3.19
safety margin
c
distance between the nominal water level determined by the manufacturer and the overflow level
3.20
flush rate
volume of water flowing out of a flushing cistern as a function of time
3.21
test height
distance between the seat of the outlet valve and the horizontal axis of the flush pipe
3.22
impact force
force of the flushing water at the outlet of the flush pipe
3.23
flushing device
device fitted to a cistern to provide controlled measured volume(s) of water to a WC pan or suite for
flushing
3.24
water-saving device
flushing device that permits a part of the total flush volume to be delivered, e.g. acting as double-action
mechanisms (interruptible) or double-control mechanisms (dual control or dual flush)
3.25
warning level
level of spill over of a vertically mounted warning pipe connection or the invert of a horizontally
mounted warning pipe connection, or the level at which an equally effective (warning) device would
operate
3.26
short-term leak test
leak test consisting of a 15 min wait after flushing then positioning paper designed to change colour
when wet, under the flushing device for 10 min
Note 1 to entry: A leak is defined as being visible discharge of water amounting to more than three separate
drops.
3.27
long-term leak test
leak test consisting of a 2 h wait after flushing then positioning paper designed to change colour when
wet, under the outlet for 15 min
Note 1 to entry: A leak is defined as being visible discharge of water amounting to more than three separate
drops.
3.28
product type
set of representative performance levels or classes of a construction product, in relation to its essential
characteristics, produced using a given combination of raw materials or other elements in a specific
production process
Note 1 to entry: The definition is taken from Regulation (EU) No. 305/2011.
4 Classification
Flushing cisterns are classified as described below:
— Type 1: Flushing cisterns tested in accordance with the characteristics of Clauses 5 and 8 using a
nominal flush volume of either 4 l, 5 l, 6 l, 7 l or 9 l.
— Type 2: Flushing cisterns tested in accordance with the characteristics of Clauses 6 and 8 using a
maximum flushing volume of 6 l, or a dual-flush which combines a maximum flush of 6 l and a
reduced flush no greater than two-thirds of the maximum flush.
— Type 3: Type 1 flushing cistern intended to be used in connection with urinals.
5 Characteristics and test methods for type 1 products
5.1 Design
5.1.1 Flushing cistern equipment
An equipped flushing cistern comprises:
— a shell, provided with a removable lid or an access flap allowing access to components;
— an inlet valve complying with EN 14124;
— a flushing device;
— an overflow device;
— an operating mechanism;
— a flush pipe, when the cistern is for use with an independent WC pan.
In special cases, a combined fitting providing the functions of filling, overflowing and evacuation is
permissible. In this case, the fitting shall be designed to comply with the hygiene, physico-chemical,
leaktightness, hydraulic, pressure resistance, acoustic and mechanical characteristics specified in
EN 14124. The tests shall be performed on the flushing cistern as supplied.
5.1.2 Water supply connection
The inlet valve can be connected to the cistern through:
— the side;
— the back;
— the underside;
— the top.
5.1.3 Supply piping
All materials of the supply piping which could be in contact with drinking water shall not be a danger to
health. They shall not change the taste, aroma or visual appearance of the drinking water.
5.1.4 Removable parts
It shall be possible to dismantle removable parts, without having to remove the flushing cistern.
5.1.5 Connecting dimensions
The connecting dimensions shall comply with Table 1.
Table 1 — Connecting dimensions (Figures 2 and 3)
Dimensions
Designation Symbol Remarks
mm
c
19 ± 2 For inlet valves size 3/8”
Hole for inlet valve —
c
23 ± 2 For inlet valves size 1/2”
+2
c
63 For ceramic flushing cisterns
−3
For thin-walled flushing cisterns (e.g.
+2
c
Hole for outlet valve A 61
plastic)
+2
c
45 For high level flushing cisterns
−3
+1
c
32,5 For flush pipes of design A
Inside diameter of
B
outlet connection
+05,
c
For flush pipes of design B
Outside diameter of
+04,
a b
For flush pipes of design C
C 49,5
outlet connection
Hole in the cover for
+2 c
— 40 Recommended dimension
−1
operating device
a
Not applicable to flushing cisterns built into wall frames.
b
Where the exterior diameter of the flush pipe is conical or has several stepped diameters, the maximum
diameter is to be verified and recorded.
c
Other dimensions are permissible if the performance of the cistern is ensured.
Key
See Table 1
Figure 2 — Outlet connection for flush pipes of design A, B1 and B2
Key
See Table 1
Figure 3 — Outlet connection for flush pipes of design C
NOTE Design B means design B1 and design B2.
5.1.6 Flush pipes
The dimensions of flush pipes designed to equip WC pans for independent supply shall comply with
Table 2. The flush pipe shall be provided by the manufacturer of the flushing cistern.
Table 2 — Dimensions of flush pipes (Figures 4 to 7)
Dimension
Designation Symbol Remarks
mm
Outside diameter inlet +05, For flush pipes of design A
b
+05, For flush pipes of designs B1 and B2
+1
Inside diameter For flush pipes of design C
c 50
+05,
Outside diameter at outlet WC For flush pipes of design A
+05, For flush pipes of design B1
e
+05, For flush pipes of design B2
+05, For flush pipes of design C
Inside diameter at outlet WC f ≥ 39 For flush pipes of designs B1, B2 and C
Height of flush pipe ≥ 1 500 For flush pipes of design A
≥ 165
h For flush pipes of designs B1 and B2
≥ 600
≥ 165 For flush pipes of design C
Length ≥ 210 For flush pipes of designs A, B1 and
B2
k
≥ 180 For flush pipes of design C
Length of vertical inlet portion m ≥ 100 For flush pipes of design A
Radius of bend 50 to 80 For flush pipes of design A
r ≥ 15 For flush pipes of designs B1 and B2
≥ 5 For flush pipes of design C
Apart from dimension e other dimensions are permissible, provided the performance requirements in
5.2 are satisfied.
Key
See Table 2
Figure 4 — Design A flush pipe for wall-hung high-level cisterns, fabricated in one or two parts
Key
See Table 2
Figure 5 — Design B1 and B2 flush pipes for wall-hung low-level or mid-level cisterns
Key
See Table 2
Figure 6 — Design C flush pipe for built-in cisterns
Key
r radius of bend
Figure 7 — Detail X
5.2 Hydraulic and mechanical characteristics
5.2.1 Flush volume
Flush volume(s) shall correspond with those specified in Table 3, when measured as described in 5.3.2.
Table 3 — Flush volumes
Flush volumes
l
Nominal flush volumes
l For complete flushing For water-saving (dual) flushing
Minimum Maximum Minimum Maximum
a
9,0 8,5 9,0 3,0 4,5
a
7,0 7,0 7,5 3,0 4,0
a
6,0 6,0 6,5 3,0 4,0
a
5,0 4,5 5,5 3,0 4,0
a
4,0 4,0 4,5 2,0 3,0
a
Only for double-control water-saving (dual) flushing devices.
Flushing cisterns or their components shall be marked to allow the correct volume(s) of flush to be
achieved.
Flushing cisterns with a nominal volume of 9 l, 7 l, 6 l, 5 l or 4 l can be used to deliver the different
volumes shown in Table 3. Adjustment can be effected at the inlet valve and/or the outlet mechanism.
The manufacturer’s instructions shall describe the procedure and the consequences (e.g. increase in the
residual water level or decrease in the filling level).
5.2.2 Water-saving devices
Water-saving mechanisms shall be designed so that, when selected, only part of the total flush volume is
delivered.
Water-saving mechanisms shall comply with the requirements specified below:
a) Double-action mechanisms (interruptible):
1) one action initiates flushing; and
2) a second action stops the flush.
Devices with immediate and automatic closing are not permitted.
b) Double-control mechanisms (dual control):
1) one control releases the full flush volume; and
2) another control releases a reduced flush volume.
Both devices shall deliver flush volumes and flush rates in accordance with Tables 3 and 4.
5.2.3 Flush rate and impact force
When tested as described in 5.3.3 and 5.3.11, the flush rate and the impact force shall comply with the
values specified in Table 4.
Table 4 — Flush rates and impact force
Flush rate for complete
Test height Impact force
flush
Sub-type of flushing cistern
mm N
l/s
Independent wall-hung low-
level using flush pipe of design 200 ± 5 — 2,4 ± 0,2
B1
Independent wall-hung low-
d
level using flush pipe of design 330 ± 5 — 2,2 ± 0,2
B2
a
Independent built-in ≥ 195 — 2,2 ± 0,2
Independent built-in > 3,9 (defined by the
maximum method)
or
a
< 195 2,2 ± 0,2
> 3,7 (defined by the
fixed time frame
method)
Independent wall-hung mid-
+04,
565 ± 5 — 18,
−01,
level
Independent wall-hung high-
+04,
18,
1 365 ± 5 —
−01,
level
b
One-piece and close-coupled — — n.a.
c
Multiple use close-coupled — — min. 2,0
a
Flushing cisterns with integral flush pipes and flushing cisterns built into wall frames shall be tested as
supplied by the manufacturer, regardless of the test height.
b
One-piece and close-coupled WCs will be tested in accordance with EN 997.
c
Independent from this value, the flushing cistern shall be tested in accordance with EN 997 with dedicated
WC pans specified by the manufacturer of multiple close-coupled flushing cisterns.
+05,
d
This test height is valid for flush pipe of design B2 with outside diameter at outlet to WC of 40 mm.
5.2.4 Overflow
When tested as described in 5.3.4, the overflow shall be designed in accordance with the requirements
specified below (see Figure 8):
a) the distance between the maximum water level and the level of overflow shall be ≤ 20 mm;
b) the distance between the critical water level and the level of overflow shall be ≤ 10 mm;
c) the distance between the meniscus level and the level of overflow shall be ≤ 5 mm.
Dimensions in millimetres
Key
1 overflow pipe
2 overflow level
3 maximum water level
4 critical water level
5 meniscus level
Figure 8 — Maximum, critical and overflow level
5.2.5 Inlet valve opening characteristics for water saving flushing
When tested as described in 5.3.5, inlet valves used with flushing cisterns equipped with a water-saving
device shall re-open during or after the short flush has been completed.
5.2.6 Safety margin – dimension “c”
When tested as described in 5.3.6, dimension “c” (see Figure 9) corresponding to the distance between
the overflow level and the maximum nominal water level indicated by the manufacturer shall be at least
20 mm.
Key
1 maximum water level
2 overflow level
3 maximum nominal water level
a distance between overflow level and the point of the air inlet orifice of the inlet valve
c safety margin
Figure 9 — Safety margin dimensions
5.2.7 Backflow prevention, air gap, safety margin – dimension “a”
When tested as described in 5.3.7, the dimension “a” (see Figure 9) between the overflow level and the
lowest point of the air inlet orifice of the inlet valve shall be 20 mm minimum as required by EN 1717 to
prevent backflow.
In the case of adjustable overflow, the adjustment shall provide a dimension “a” of 20 mm minimum.
5.2.8 Outlet valve leaktightness
When tested in accordance with 5.3.8, there shall be no leakage greater than three drops within 15 min.
5.2.9 Outlet valve reliability
When tested in accordance with 5.3.9, the outlet mechanism functions shall be ensured.
The flushing device shall not show any failure or permanent distortion of any components including
linkages that prevents normal operation of the mechanism.
The outlet of the flushing device shall not show leakage greater than three drops within 15 min.
5.2.10 Operating force
When tested as described in 5.3.10, it shall be possible for the outlet mechanism to be actuated with a
maximum force of 25 N.
5.2.11 Durability
Type 1 products conforming with 5.2.1, 5.2.3 to 5.2.9 and Clause 8 are deemed to be durable.
5.3 Test methods
5.3.1 General
The tests described are type tests (laboratory tests) and not quality control tests carried out during
manufacture.
5.3.2 Flush volume
5.3.2.1 General
The flush volume(s) shall be as specified in Table 3.
The flush volume(s) for one-piece and close-coupled cisterns supplied with a WC pan shall conform
with the value(s) specified by the manufacturer.
5.3.2.2 Determination of the full flush volume
— Install the cistern on a firm flat horizontal or vertical surface as appropriate.
— Fill the flushing cistern via an inlet valve to the level indicated by the manufacturer.
— Shut off the supply.
— Operate the flushing mechanism control and collect the water delivered.
— Measure the volume using a calibrated container.
— Perform the test three times.
— If there are differences in the volumes delivered, calculate the arithmetic mean for the three
volumes.
— In the case of flushing cisterns that provide a choice of flush volumes, the test shall be repeated for
each of these flush volumes.
5.3.2.3 Determination of the flush volume for water-saving devices
5.3.2.3.1 Double-action water-saving devices
— Fill the flushing cistern via an inlet valve to the level indicated by the manufacturer.
— Shut off the supply.
— Operate the flushing mechanism control and stop the flush after 1,5 s whilst collecting the water
delivered.
— Measure the volume using a calibrated container.
— Perform the test three times.
— If there are differences in the volumes delivered calculate the arithmetic mean for the three
volumes.
— In the case of flushing cisterns that provide different flush volumes, the test shall be repeated for
each of these volumes.
5.3.2.3.2 Double-control water-saving devices
— Fill the flushing cistern via an inlet valve to the level indicated by the manufacturer.
— Shut off the supply.
— Operate the control for the reduced flush volume and collect the water delivered.
— Measure the volume using a calibrated container.
— Perform the test three times.
— If there are differences in the volumes delivered, calculate the arithmetic mean for the three
volumes.
— In the case of flushing cisterns that provide different flush volumes, the test shall be repeated for
each of these volumes.
5.3.3 Flush rate
5.3.3.1 Test apparatus
a) For flushing cisterns equipped with a flush pipe, the test shall be carried out with the flush pipe
using the height specified in Table 4.
For multiple-use close-coupled flushing cisterns, the test shall be carried out without a flush pipe.
b) A pressure sensor with the following characteristics shall be used:
1) measuring range from 0 MPa to 0,005 MPa (from 0 bar to 0,05 bar);
2) accuracy > class 1;
3) response time ≤ 10 ms;
4) acquisition rate ≥ 40 acquisitions per second.
Dimensions in millimetres
Key
1 flushing cistern 5 residual water level
2 measured volume 6 seat level
3 pressure sensor 7 flush pipe
4 nominal water level 8 test height (see Table 4)
Figure 10 — Test arrangement for testing low-level, mid-level and built-in flushing cisterns
5.3.3.2 Determination of the residual water level
— Fill the flushing cistern via an inlet valve to the water level indicated by the manufacturer.
— Shut off the supply.
— Operate the flushing mechanism.
— Record the residual water level, when flushing is completed.
— Perform the test three times.
— If there are differences in the levels obtained, record the highest residual water level.
— In the case of flushing cisterns with alternative flush volumes indicated, the residual water level
shall be established for each volume.
— In the case of flushing cisterns having an adjustment of flushing volumes via the outlet valve, the
increased residual water level shall be established and marked for each of the adjustable flushing
water volumes.
5.3.3.3 Establishing the measuring points to measure the flush rate
5.3.3.3.1 General
In order to measure the flush rate, it is necessary to establish the measuring points indicated in
Figures 11, 12 and 13.
5.3.3.3.2 Flushing cisterns with an outlet valve adjustment for flushing volumes of 6 l, 7 l or 9 l
respectively
The determination of the measuring points and the adjustment of the water level are illustrated in
Figure 11.
The choice of measuring points is significant for measuring the flush rate.
Key
V1 starting volume (full flush 1,0 l)
V2 measuring volume (full flush 3,0 l)
V3 finishing volume (full flush 2,0 l, 3,0 l, 5,0 l)
Figure 11 — Flushing cisterns with an outlet valve adjustment for flushing volumes of 6 l, 7 l or
9 l respectively
5.3.3.3.3 Flushing cisterns with an inlet valve adjustment for flushing volumes of 6 l, 7 l or 9 l
respectively
The determination of the measuring points and the adjustment of the water level are illustrated in
Figure 12.
The choice of measuring points is significant for measuring the flush rate.
Key
V1 starting volume (full flush 1,0 l, 2,0 l, 4,0 l)
V2 measuring volume (full flush 3,0 l)
V3 finishing volume (full flush 2,0 l)
Figure 12 — Flushing cisterns with an inlet valve adjustment for flushing volumes of 6 l, 7 l or 9 l
respectively
5.3.3.3.4 Flushing cisterns with a combined outlet/inlet valve adjustment flushing volume of 4,0 l
or 5,0 l respectively
Flushing cisterns with a combined outlet/inlet valve adjustment flushing volume of 4,0 l or 5,0 l and the
determination of the measuring points and the adjustment of the water level are illustrated in
Figure 13.
The choice of measuring points is significant for measuring the flush rate.
Key
V1 starting volume (full flush 1,0 l)
V2 measuring volume (full flush ≥ 2,0 l)
V3 finishing volume (full flush 1,0 l)
V4 residual volume (full flush individual)
Figure 13 — Flushing cisterns with a combined outlet/inlet valve adjustment flushing volume of
4,0 l or 5,0 l respectively
EXAMPLE For a flush with 4 l in a 7 l flushing cistern:
Maximum adjustable flushing volume 7,0 l
Adjustment via the inlet valve to 5,5 l
Giving for full flush:
— V1 = 1,0 l;
— V2 = 2,0 l;
— V3 = 1,0 l;
— V4 = 1,5 l.
V4 being the volume remaining in the flushing cistern, controlled by the outlet valve.
5.3.3.3.5 Flushing cisterns having no flushing volume adjustment
For flushing cistern having no flushing volume adjustment, i.e. where the volume is permanently set to
4 l, 5 l, 6 l, 7 l or 9 l, the measuring points and the setting of the water level shall be established or
obtained by analogy with the description in 5.3.3.3.2 to 5.3.3.3.4.
5.3.3.4 Determination of flush rate
5.3.3.4.1 General
For flushing cisterns providing the possibility of adjustment to different flushing volumes, the flush rate
is to be measured at the adjustment corresponding to the lowest measuring points as 5.3.3.3.2 to
5.3.3.3.4.
5.3.3.4.2 Flush rate for complete flushing
— Fill the flushing cistern via an inlet valve to the level determined as described in 5.3.3.3.
— Shut off the water supply.
— Operate the flushing mechanism.
— Using the sensor established in the cistern as described in 5.3.3.1, record the pressure/time curve.
— Extrapolate from the recording the flush rate between the measuring points established as
described in 5.3.3.3.
— The test shall be performed three times.
— The arithmetic mean of the three separate operations shall be taken as the flush rate.
5.3.4 Determination of the overflow capacity
— Record the overflow level.
— Supply the flushing cistern with a flush rate of 0,28 l/s for at least 60 s.
In the case of a combined mechanism (inlet valve + flushing mechanism), supply the mechanism at
a pressure of 0,6 MPa (6 bar) and force the inlet valve to be open for at least 60 s.
— Record the maximum water level when the level has stabilized.
— Shut off the water supply.
— Determine the water level 2 s after the water supply is shut-off (critical water level).
— Record the meniscus level after stabilization.
5.3.5 Inlet valve opening characteristics
— Fill the flushing cistern using an inlet valve with a supply pressure of 0,3 MPa (3 bar) to the level(s)
indicated by the manufacturer.
— In the case of a double-action flushing cistern, stop the flush after (1,5 ± 0,2) s or in the case of a
double-control cistern, operate the reduced flush control.
— Verify opening of the inlet valve and re-filling of the cistern to the level(s) indicated by the
manufacturer.
5.3.6 Determination of dimension “c”
Fill the flushing cistern using an inlet valve to the highest water level indicated by the manufacturer.
Measure dimension “c” representing the safety margin (see Figure 9) between the maximum nominal
water level and the overflow level.
5.3.7 Determination of dimension “a”
Determine dimension “a” (see Figure 9) representing the distance between the lowest point of the inlet
valve’s air inlet orifice and the overflow level using the inlet valve manufacturer’s marking
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