EN 997:2003

SLOVENSKI STANDARD
01-maj-2004
1DGRPHãþD
SIST EN 997:2000
WC školjke in WC naprave z integriranim sifonom
WC pans and WC suites with integral trap
WC-Becken und WC-Anlagen mit angeformtem Geruchverschluss
Cuvettes de WC et cuvettes a réservoir attenant a siphon intégré
Ta slovenski standard je istoveten z: EN 997:2003
ICS:
91.140.70
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 997
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2003
ICS 91.140.70 Supersedes EN 997:1999
English version
WC pans and WC suites with integral trap
Cuvettes de WC et cuvettes à réservoir attenant à siphon WC-Becken und WC-Anlagen mit angeformtem
intégré Geruchverschluss
This European Standard was approved by CEN on 2 July 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 997:2003 E
worldwide for CEN national Members.

Contents
page
Foreword.4
1 Scope .5
2 Normative references .5
3 Terms and definitions.5
4 Classification.8
5 Functional requirements and test methods for class 1 products.8
5.1 Depth of water seal .8
5.2 Flushing requirements .8
5.2.1 General.8
5.2.2 Wash of bowl.9
5.2.3 Flushing of toilet paper .9
5.2.4 Flushing of fifty small plastic balls .9
5.2.5 Over-splashing.9
5.2.6 After-flush volume .9
5.3 Water absorption .9
5.4 Static load.9
5.5 Leak tightness.9
5.6 Valve reliability.10
5.7 Durability of class 1 products.10
5.8 Test methods.10
5.8.1 Depth of water seal .10
5.8.2 Flushing tests.10
5.8.3 Determination of water absorption .12
5.8.4 Load test .13
5.8.5 Leak tightness.13
5.8.6 Valve reliability.13
5.9 Types of WC pans.14
5.9.1 Nominal flush volume.14
5.9.2 Flushing devices.15
6 Functional requirements and test methods for class 2 products.15
6.1 Inlet valve.15
6.2 Backflow prevention.15
6.3 Marking of flushing cistern.15
6.4 Warning pipe and overflow provision.15
6.5 Flush Volume.15
6.5.1 Full flush .15
6.5.2 Reduced flush .15
6.6 Flush rate.16
6.7 Physical endurance and leakage of flushing device (valve reliability and water/leak tightness) .16
6.8 Chemical endurance of flushing device (water/leak tightness).16
6.9 Solids discharge and after-flush volume for maximum flush.16
6.10 Paper discharge for reduced-flush volume.16
6.11 Liquid contaminant dye retention .16
6.12 Wash of bowl.16
6.13 Depth of water seal .16
6.14 Static load of class 2 products.16
6.15 Water absorption .17
6.16 Durability of class 2 products.17
6.17 Test methods.17
6.17.1 Inlet valve tests .17
6.17.2 Warning pipe and overflow provisions.17
6.17.3 Flush volume and water trap seal tests.17
6.17.4 Flush rate test .18
6.17.5 Physical endurance and leakage test of flushing device .19
6.17.6 Chemical endurance test of flushing device .20
6.17.7 Solids discharge and after-flush volume for maximum flush volume test.21
6.17.8 Paper discharge for reduced-flush volume test .22
6.17.9 Liquid contaminant dye retention test.22
6.17.10 Wash of bowl.23
6.17.11 Summary of requirements for compatibility testing of class 2 products .24
7 Dangerous substances .24
8 Marking .24
9 Evaluation of conformity.24
9.1 General.24
9.2 Type testing.25
9.2.1 Initial type testing .25
9.2.2 Further type testing .25
9.2.3 Sample, testing and compliance criteria.25
9.3 Factory Production Control (FPC) .26
9.3.1 General.26
9.3.2 Testing equipment.26
9.3.3 Raw materials and components.26
9.3.4 Product testing and assessment .27
9.3.5 Non-conforming products .27
Annex A (normative) Valve-type test flushing cistern.28
Annex B (normative) Test rig for pressure flush valve .30
Annex C (normative) Test rig for after-flush volume test .33
C.1 Test rig for after-flush volume test for independent WC pans (Figures C.1 and C.2) .33
C.2 Test rig for after-flush volume test for one-piece WC pans, close-coupled suites and WC
suites (Figure C.3).34
Annex D (normative) Basket method .35
Annex E (normative) Preparation of test specimens.36
Annex F (normative) Valveless-type test flushing cistern.38
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive.40
ZA.1 Scope and relevant characteristics .40
ZA.2 Procedure for attestation of conformity of WC pans and WC suites .42
ZA.2.1 System of attestation of conformity .42
ZA.2.2 Declaration of conformity .42
ZA.3 CE marking and labelling.43
Foreword
This document (EN 997:2003) 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 March 2004, and conflicting national standards shall be withdrawn at the latest by
June 2005.
This document supersedes EN 997:1999.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
This standard is one of a series of standards for sanitary appliances. Supporting standards are those for flushing
devices and connecting dimensions.
NOTE: Noise level has not been considered in the present amendment. Noise level will be considered as soon as a
European test method is available.
Annexes A, B, C, D, E and F are normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.

Presently, a test method is under elaboration by CEN/TC 126 "Acoustic properties of building products and of buildings"
1 Scope
This standard specifies constructional and performance requirements together with test methods for close-coupled
suites, one-piece and independent WC pans with integral trap used for personal hygiene manufactured from
vitreous china or stainless steel.
This standard does not apply to squatting toilettes, WC pans without integral trap, flushing cisterns as separate
appliances.
Flushing cisterns are covered by other standards and the reference to cisterns in this standard is related only to the
definition and requirements of flushing volume.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
AS 1172-1:1993, Water closets of 6/3 L capacity - Pans.
BS 1212-1:1990, Float operated valves. Specification for piston type float operated valves (copper alloy body)
(excluding floats).
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 1212-4:1991, Float operated valves. Specification for compact type float operated valves for WC flushing
cisterns (including floats).
NOTE These normative references refer to products of class 2 only.
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply:
3.1
pedestal WC pan
floor-mounted WC pan that has an integral base
3.2
wall-hung WC pan
WC pan cantilevered clear of the floor
3.3
wash-out WC pan
WC pan in which excrement falls first into a shallow water filled bowl, before being
removed by the flushing water
3.4
wash-down WC pan
WC pan in which excrement falls directly into the trap before being removed by the
flushing water
3.5
siphonic WC pan
WC pan in which excrement is removed by siphonage induced by the flushing water
3.6
close-coupled suite
combination of a WC pan and flushing cistern directly coupled into a functional unit
3.7
one-piece WC pan
WC pan manufactured with an integral flushing cistern
3.8
independent WC pan
WC pan suitable for the connection with a flushing cistern or a pressure flush valve
3.9
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
3.10
pressure flush valve
valve directly connected to the water supply which delivers a pre-determined volume of
flushing water for removal of excrement from a WC pan
3.11
valveless type flushing cistern
cistern with outlet actuated by siphonic action which delivers a defined volume of
flushing water for removal of excrement from a WC pan
3.12
WC suite
WC pan combined with either a flushing cistern with integral warning pipe connection –
or a device deemed to be a no less effective device – and inlet/outlet devices, or a
pressure flush valve, with WC and flushing device installed as a functioning unit
3.13
flush volume
volume of water discharged from the flushing device during a flush cycle
3.14
after-flush volume
remaining flush water volume after the last of four test specimens have left the outlet of
the bowl
3.15
water trap
water seal that prevents backflow of foul odour from a drain
3.16
fluid contaminant
liquid to be removed by flushing action
3.17
residual fluid contaminant
liquid waste left behind in the WC bowl after completion of a flush
3.18
solid test media
media used to represent faecal matter
3.19
inlet valve
valve that controls and shuts off the flow of water into a cistern, usually by an arm
connected to a float
3.20
flushing device
device fitted to a cistern to provide controlled measured volume(s) of water to a WC
pan or suite for flushing
NOTE A flushing device can be a siphon, drop valve, flap valve or pressurised cistern etc.
For the purposes of this specification, the flushing device includes the activator (i.e. handle,
button, linkages etc.) and all seals, pistons, or other integral components.
3.21
dual-flush
flushing cisterns with two modes of operation, one delivering a larger volume than the
other, in which:
the larger (full) flush option is not greater than 6 l; and
the smaller (reduced) flush option is not greater than two-thirds the volume of the
larger flush
3.22
warning level
level of spillover 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
3.23
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. A leak is defined as
being visible discharge of water amounting to more than three separate drops
3.24
long-term leak test
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. A leak is
defined as being visible discharge of water amounting to more than three separate
drops
NOTE Drawings are diagrammatic only.
4 Classification
WC pans and suites are classified as described below:
Class 1: WC pans and suites designed for use with and tested using a nominal flush volume of either 4 l, 5 l,
6 l, 7 l or 9 l (see clause 5).
Class 2: WC suites designed for use with a pressure flushing valve or a flushing cistern incorporating some
other flushing device, and tested as described in clause 6, using a maximum flushing volume of 6 l, or
a dual-flush combining a maximum flush of 6 l and a reduced flush no greater than two-thirds of the
maximum flush volume (see clause 6).
5 Functional requirements and test methods for class 1 products
5.1 Depth of water seal
When tested in accordance with 5.8.1, the depth of the water seal shall be not less than 50 mm.
5.2 Flushing requirements
5.2.1 General
Table 1 correlates the flushing requirements to the WC pan type and flushing volume.
Table 1 — Flushing requirements
Type of WC pan Wash of bowl Flushing of toilet Flushing of Over-splashing After-flush
(5.2.2) paper (5.2.3) 50 plastic balls (5.2.5) volume
(5.2.4) (5.2.6)
9X X X X
7X X X X
6X X X X
5X X X X
4X X X X
The efficiency of flushing is simulated by the following requirements.
5.2.2 Wash of bowl
When tested in accordance with 5.8.2.3 , the arithmetic average of any unflushed area below the rim and above the
surface of the water in the trap shall not be more than 50 cm after five flushing operations.
5.2.3 Flushing of toilet paper
When tested in accordance with 5.8.2.4, 12 sheets of toilet paper shall be flushed out of the WC pan a minimum of
4 times out of five tests.
5.2.4 Flushing of fifty small plastic balls
When tested in accordance with 5.8.2.5, after five tests, each with 50 balls, a minimum of 85 % of the balls shall be
flushed out of the WC pan.
5.2.5 Over-splashing
When tested in accordance with 5.8.2.6, flushing water shall not splash beyond the rim of the bowl and wet the
floor. Only a few small drops are permissible.
5.2.6 After-flush volume
When tested in accordance with 5.8.2.7, an after-flush volume of 2.5 l or 2.8 l as appropriate is required.
5.3 Water absorption
When tested in accordance with 5.8.3, the arithmetic average for water absorption of glazed ceramic WC pans
shall not exceed 0,5 % by mass.
5.4 Static load
When tested in accordance with 5.8.4, wall-hung and non-ceramic WC pans and suites shall withstand a force of
(4.00 ± 0.05) kN without showing any evidence of cracking or permanent deformation.
Experience has shown that pedestal ceramic WC pans and suites comply with this requirement.
5.5 Leak tightness
When close-coupled suites comprising a flushing cistern and a WC pan supplied together by the manufacturer as a
unit are tested in accordance with 5.8.5, there shall be no leakage between the WC pan and the flushing cistern.
5.6 Valve reliability
When tested in accordance with 5.8.6, the flush of the outlet shall not show leakage greater than three drops within
15 min.
5.7 Durability of class 1 products
Class 1 products conforming with the requirements of 5.2 to 5.6 are deemed to be durable.
5.8 Test methods
5.8.1 Depth of water seal
Install the WC pan in accordance with 5.8.2.2. Flush the WC pan and measure the height from the invert of the
trappage back plate to the surface of the water.
5.8.2 Flushing tests
5.8.2.1 Apparatus
Independent WC pans are to be tested with one or both of the following separate flushing devices with test flushing
volumes in accordance with Table 2 and annex C as indicated by the manufacturer:
Valve-type flushing cistern Type A (see annex A)
Pressure flush valve Type C (see annex B)
For close-coupled suites and one-piece WC pans see Table 3 and annex C.
5.8.2.2 Preparation to test
Independent WC pans
Install the pedestal or wall-hung WC pan to be tested on a firm flat horizontal or vertical surface as appropriate.
Connect a flushing device in accordance with annex A or B.
Close-coupled suites and one-piece WC pans
Install the suite or the one-piece WC pan on a firm flat horizontal or vertical surface as appropriate using the
flushing device provided and specified by the manufacturer. The flushing volume shall be verified for the type of the
WC pan (see Table 4).
5.8.2.3 Sawdust test
5.8.2.3.1 Test material
20 g of fine dry wooden sawdust.
5.8.2.3.2 Test method
Moisten the complete inner surface of the WC pan below the flushing rim and above the surface of the water in the
trap. Immediately afterwards, sprinkle that sawdust as completely and evenly as possible over the moistened
surface. Flush the WC pan and measure any unwashed area. Repeat this procedure 5 times.
5.8.2.4 Toilet paper test
5.8.2.4.1 Test material
Toilet paper with a saturation time of (15 ± 10) s verified by the basket method (see annex D). Individual sheets
shall have a size approximately 140 mm x 100 mm. The mass per unit surface of the toilet paper shall be
(30 ± 10) g/m .
5.8.2.4.2 Test method
Individually loosely crumple 12 sheets of toilet paper and drop them separately one after the other into the WC pan
within a time of 14 s to 18 s. Operate the flushing mechanism within 2 s of the last sheet being dropped into the
WC pan. Check for and remove any paper not flushed out of the bowl and the trap. Repeat this test 5 times.
5.8.2.5 Fifty plastic balls test
5.8.2.5.1 Test material
2)
50 balls of non-absorbent material, each having a mass of (3,7 ± 0,1) g and a diameter of (20 ± 0,1) mm .
5.8.2.5.2 Test method
For each flushing operation place the 50 balls into the WC pan and flush the WC pan. Check for and remove any
balls left in the WC pan. Repeat this test 5 times.
5.8.2.6 Over-splashing test
5.8.2.6.1 Test material
Paper of a type which shows surface change when wet.
5.8.2.6.2 Test method
Lay the paper around the WC pan to be tested projecting 200 mm beyond the plan of the bowl projected onto the
floor. Flush the WC pan and record evidence of water on the paper. The test shall be made with the flushing
volume which the WC pan will be approved for.
5.8.2.7 After-flush volume test
5.8.2.7.1 Test rig
A test rig in accordance with annex C.
NOTE Other test rigs can be used if the deviation of the after-flush volume related to 6 l is not more than ± 0,1 l using a
reference WC pan.
5.8.2.7.2 Test material
Four test specimens prepared in accordance with annex E.

2)
Suitable balls are available from Fa. Gebauer GmbH, Kugelfabrik, P.O. Box 425, 36004 Fulda, Germany or CIMAP, Avenue
Paul Adam 21 – 25 75017 Paris, France. This information is given for the convenience of users of this standard and does not
constitute an endorsement by CEN of these products.
5.8.2.7.3 Test material
Place the four test specimens one after the other into the WC pan and flush the WC pan. Repeat this test 10 times.
The test is positive, if:
a) in 8 out of 10 flushes all 4 test specimens are evacuated and the after-flush volume is on each occasion 2,5 l
or
b) the arithmetical average of after-flush volume of the 10 flushing operations is 2,8 l.
The result of flushing operations without four test specimens being evacuated shall count as 0 l.
If the WC pan does not provide results according to a) or b) repeat the procedure again for a further 20 flushing
operations.
The test then is positive, if:
c) in 16 out of 20 flushes all four test specimens are evacuated and the after-flush volume is on each occasion
2,5 l or
d) the arithmetical average of after-flush volume of the 20 flushing operations is 2,8 l.
5.8.3 Determination of water absorption
5.8.3.1 Test material and apparatus
a balance accurate to 0,05 g;
an oven controlled at a test temperature of (105 ± 2) °C;
a desiccator with fresh prepared silica gel;
a chamois leather;
a heated bath with controller;
demineralized water;
a pair of fine tweezers.
5.8.3.2 Test method
Break three samples glazed on one face from a WC pan. The unglazed surface area of the samples shall be
approximately 30 cm and the maximum thickness including the glaze shall be approximately 12 mm.
Dry the samples at a temperature of 105 °C for (180 ± 5) min.
Allow the samples to cool in a desiccator.
Weigh each sample to an accuracy of 0,05 g; the mass is m
Using the fine tweezers place the samples in the bath and fill with demineralized water. Ensure they do not
touch the sides or the bottom of the bath.
Heat the water to boiling point for (120 ± 5) min. Afterwards stop the heating process and leave the samples
immersed for a further (20 ± 1) h.
Using the fine tweezers take the samples immediately from the water and dry them with a slightly damp
chamois leather.
Any cavities or holes shall be dried using a fine brush.
Weigh each sample immediately; this mass is m
The coefficient of water absorption in percentage shall be calculated for each sample using equation (2).
mm
1 0
WA100  (2)
m
where
WA is the coefficient of water absorption, in %;
m is the mass of dry sample, in g;
m is the mass of sample after immersion in water, in g.
Calculate the arithmetical average of the water absorption coefficient for the three samples. Report each
individual value and the calculated arithmetical average.
5.8.4 Load test
Wall-hung WC pans shall be fixed in accordance with
the manufacturer's instructions onto a smooth surface
with a layer of mortar or other facing material used for
pointing between the back of the WC pan and the
smooth surface.
Pedestal WC pans of non-ceramic materials shall be
fixed onto a solid smooth horizontal surface in
accordance with the manufacturer's instructions. Figure 1 — Load test
A force of (4,00 ± 0,05) kN shall be applied for a period
of 1 h by means of a beam with a cross section of
100 mm x 100 mm positioned across the centre of the
top surface of the WC pan (see Figure 1).
5.8.5 Leak tightness
Flush the close-coupled suite and observe the connection between the WC pan and the flushing cistern for any
leakage during complete flush.
5.8.6 Valve reliability
5.8.6.1 Test apparatus
The test apparatus comprises:
the flushing cistern to be tested as component of close-coupled suite or one-piece WC pan filled through an
inlet valve;
an automatic system allowing the flushing mechanism to be activated with a controlled force in the range of
25 N to 30 N and with a velocity of 5 cm/s in a period of 0,5 s to 1 s;
a water supply with a temperature of 15 °C to 25 °C
5.8.6.2 Test procedure
The test shall be performed using the highest level in the flushing cistern when several alternative water levels are
indicated.
Fill the flushing cistern to the nominal water level indicated by the manufacturer.
Activate the flush by means of the automatic system.
After the automatic closing of the outlet valve refill the flushing cistern.
In case of single-flush mechanism, subject the mechanism to 50 000 cycles (category I) or 200 000 cycles
(category II).
In case of double-flush mechanisms, subject each mechanism to 25 000 cycles (category I) or 100 000 cycles
(category II).
2 h after finishing of the cycles, verify the leak tightness, specified in 5.6.
5.9 Types of WC pans
5.9.1 Nominal flush volume
The nominal flush volume of independent WC pans shall correspond to one of the types given in Table 2.
Table 2 — Types of independent WC pans
Type Nominal flush volume Test flush volume
l l
0,1
0,1
0,1
0,5
0,1
The close-coupled suites and one-piece WC pans shall correspond to one of the types given in Table 3.
Table 3 — Types of close-coupled suites and one-piece WC pans
a
Type Nominal flush volume
Test flush volume
l
l
1,4
7 7 7 ± 0,5
0,4
0,5
0,4
0,5
1,044
0,5
a
Test flush volume and type shall be defined by the manufacturer.
5.9.2 Flushing devices
Independent WC pans shall be designed to be flushed by any one or both of the following separate flushing
devices:
Valve-type cistern Type A (see annex A)
Pressure flush valve Type C (see annex B)
6 Functional requirements and test methods for class 2 products
6.1 Inlet valve
Either the first inlet valve or, in the event of this failing, all four of the remaining inlet valves shall comply with
BS 1212: Parts 2, 3, or 4 subject to the amendments listed below:
The water hardness during tests shall not exceed the range of (230 ± 20) ppm of calcium carbonate (CaCO )
during the course of the test.
The supply pressure for the endurance test described in Parts 3 and 4 shall be (0,15 ± 0,01) MPa.
Part 2 valves shall be subject to an endurance test as described in Parts 3 and 4 using a supply pressure of
(0,15 ± 0,01) MPa.
The endurance test shall be undertaken for 200 000 cycles and if the first inlet valve fails the test, the four
valves subsequently tested must all satisfy the requirements.
6.2 Backflow prevention
When tested in accordance with the backflow prevention requirements of clauses 15 or 17 of BS 1212 Parts 3 or 4
respectively there shall be no evidence of backflow.
6.3 Marking of flushing cistern
Every flushing cistern, other than a pressure flushing cistern, shall be clearly marked internally with an indelible line
to show the intended volume of flush, together with an indication of that volume. Discharge volume(s) shall be
based on measurement from the water level in the cistern using the manufacturer's original equipment to the
residual water level in the cistern on completion of a flush.
6.4 Warning pipe and overflow provision
When tested as described in 6.17, every flushing cistern, not being a pressure flushing cistern, shall be fitted with a
warning pipe connection arranged with the discharge level between 25 mm to 32 mm above the marked water
level, or a no less effective device shall be provided. The top edge of any internal overflow shall be not less than
10 mm above the warning level.
6.5 Flush Volume
6.5.1 Full flush
When tested as described in 6.17.3 with any adjustable flushing device set to deliver the maximum flush volume,
the measured discharge shall on no occasion exceed 6 l.
6.5.2 Reduced flush
When tested as described in 6.17.3 with any adjustable flushing device set to deliver a reduced flush volume, the
measured discharge shall on no occasion exceed two-thirds of the full flush volume.
6.6 Flush rate
When tested as described in 6.17.4, the mean flush rate of discharge per flush shall be 1,85 l/s for the full-flush
and 1,6 l/s for the reduced-flush, if provided.
6.7 Physical endurance and leakage of flushing device (valve reliability and water/leak tightness)
When tested as described in 6.17.5, the flushing device shall not undergo any failure or permanent distortion of any
components including linkages that prevents normal operation of the mechanism.
No more than two instances of leakage are permitted. A leak is defined as being visible discharge of water
amounting to more than three separate drops. If the first flushing device fails the test, the four devices subsequently
tested shall all satisfy the requirements.
6.8 Chemical endurance of flushing device (water/leak tightness)
When tested as described in 6.17.6, there shall be:
no dimensional alteration of any component greater than 1 mm or 5 % whichever is the lesser;
no weight loss of any component greater than 1 g or 5 % whichever is the lesser;
no visible sign of physical change such that performance is impaired;
no deterioration in performance.
The flushing device shall not leak after undergoing a 3000 cycle physical endurance test and the long term leakage
test.
6.9 Solids discharge and after-flush volume for maximum flush
When tested as described in 6.17.7, for the first six flush cycles, or for a minimum of eight out of ten flush cycles,
each of the four test specimens shall be completely evacuated from the WC bowl and pan's outlet. The recorded
after-flush volume in each flush cycle shall be no less than 40 % of the full-flush volume.
6.10 Paper discharge for reduced-flush volume
When tested as described in 6.17.8, for the first six flush cycles, or for a minimum of eight out of ten flush cycles, all
six sheets of toilet paper shall be flushed out of the WC pan and outlet.
6.11 Liquid contaminant dye retention
When tested as described in 6.17.9, for the first five flush cycles, or for a minimum of nine out of ten flush cycles at
full-flush volume, the contaminate level shall be 1 %. For the first five flush cycles, or for a minimum of nine out of
ten flush cycles at reduced-flush volume, when provided, the contaminate level shall be 6 %.
6.12 Wash of bowl
When tested as described in 6.17.10, the arithmetic average of any unflushed area below the rim and above the
surface of the trap shall be no greater than 50 cm after five flushing operations.
6.13 Depth of water seal
When tested twice at random as described in 6.17.3, the depth of water seal shall be no less than 50 mm on either
occasion. If any alternative trap seal device is utilised, a no less effective comparable seal shall be in operation.
6.14 Static load of class 2 products
When tested in accordance with 5.8.4, class 2 products shall meet the requirements of 5.4.
6.15 Water absorption
When tested in accordance with 5.8.3 class 2 products shall meet the requirements of 5.3.
6.16 Durability of class 2 products
Class 2 products conforming with 6.1 to 6.15 are deemed to be durable.
6.17 Test methods
6.17.1 Inlet valve tests
6.17.1.1 Apparatus
Apparatus as specified in BS 1212 subject to the additional requirements specified in 6.1. Supply pressure
requirements for pressurised cisterns shall conform with the manufacturer's recommendations.
6.17.1.2 Procedure
Subject the inlet valve to the tests as specified in BS 1212 Parts 2, 3, or 4 as appropriate. In testing against clause
17 of BS 1212 (modified in 6.1) if the first inlet valve fails, four further valves shall be tested.
6.17.1.3 Expression of results
Record whether the inlet valve complied with the requirements of BS 1212 as modified by 6.1. For the test under
clause 17 of BS 1212 (as modified in 6.1), record whether the first inlet valves, or all four of the subsequent inlet
valves, met the requirements.
6.17.2 Warning pipe and overflow provisions
6.17.2.1 Apparatus
a) cistern with warning pipe connection or a device deemed to be no less effective and internal overflow, if
provided, installed in accordance with the manufacturer's instructions;
b) measuring device with an accuracy of 0,1 mm;
c) water supply controlled by a stop valve.
6.17.2.2 Procedure
Set the cistern level. Fill with water to the nominal static water level marked by the manufacturer. Measure the
distance from the water level to the warning level, i.e. the invert of a side connection warning pipe connection or the
top of a bottom connection warning pipe connection. If appropriate, measure the distance from the warning level to
the top of any internal overflow.
6.17.2.3 Expression of results
Record compliance or any failure to comply with the requirements of 6.4.
6.17.3 Flush volume and water trap seal tests
6.17.3.1 Apparatus
a) cistern, complete with fitments including flushpipe and cover, installed in accordance with the manufacturer’s
instructions, on a firm, flat, vertical surface;
b) measuring vessel capable of collecting the flush volume;
c) water supply controlled by a stop valve;
d) water seal depth measuring device.
6.17.3.2 Procedure
Set the dual-flush control or setting if provided, to the full-flush volume in accordance with the manufacturer’s
instructions. Connect the water supply to the flushing cistern and fill to the marked water line. Operate the flushing
mechanism three times, completing three flushing cycles. Fill the cistern to the water line. Shut off the water supply,
unless essential for the normal operation of the flushing device.
NOTE Where a water supply is essential for the normal operation of the device, the supply should be maintained at a
hydraulic pressure of (0,15 ± 0,01) MPa or the minimum required to operate the device, whichever is the greater.
Operate the flushing device and collect the water in the measuring vessel. Record the volume of water collected.
Repeat the procedure a further four times.
Record the water trap seal depth on two occasions at random by measuring the height from the invert of the
trappage back plate to the surface of the water.
Reset the dual-flush control or setting, if provided, to the reduced-flush volume and repeat the procedure 5 times.
6.17.3.3 Expression of results
Measure the volume of water collected in the measuring vessel after each flush cycle. And record compliance or
any failure to comp
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