SIST EN 1253-8:2023

SLOVENSKI STANDARD
01-januar-2023
Odtoki v stavbah - 8. del: Talni odtoki s kombinirano mehansko smradno zaporo in
zaporo vode
Gullies for buildings - Part 8: Trapped floor gullies with combined mechanical closure and
water seal
Abläufe für Gebäude - Teil 8: Bodenabläufe mit Geruchverschluss mit mechanischem
Geruchverschluss und Wassergeruchverschluss
Avaloirs et siphons pour bâtiments - Partie 8 : Siphons de sol combinant un système
d'obturation mécanique et une garde d'eau
Ta slovenski standard je istoveten z: EN 1253-8:2022
ICS:
91.140.80 Drenažni sistemi Drainage systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1253-8
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 91.140.80
English Version
Gullies for buildings - Part 8: Trapped floor gullies with
combined mechanical closure and water seal
Avaloirs et siphons pour bâtiments - Partie 8 : Siphons Abläufe für Gebäude - Teil 8: Bodenabläufe mit
de sol combinant un obturateur mécanique et une Geruchverschluss mit mechanischem Geruchverschluss
garde d'eau und Wassergeruchverschluss
This European Standard was approved by CEN on 26 September 2022.

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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1253-8:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Design and construction . 8
4.1 General. 8
4.2 Appearance . 8
4.3 Apertures in gratings . 8
4.4 Resistance of trap with mechanical closure and water seal to pressure . 9
4.4.1 Requirements . 9
4.4.2 Test method . 9
4.5 Blockage prevention . 10
4.5.1 Access for cleaning . 10
4.5.2 Clogging test . 11
4.6 Places of installation . 13
4.7 Materials . 13
4.8 Thermal behaviour of floor gullies . 13
4.8.1 General. 13
4.8.2 Requirements . 13
4.8.3 Test method . 13
4.8.4 Additional test for floor gullies for use with sheet floor coverings and liquid applied
membranes . 14
4.9 Tightness . 15
4.9.1 Odour-tightness . 15
4.9.2 Watertightness of bodies . 16
4.9.3 Watertightness of extensions . 16
4.10 Mechanical strength . 17
4.10.1 Loading strength . 17
4.10.2 Clamping ring strength . 19
4.10.3 Additional mechanical strength according to the installation . 20
4.10.4 Floor gullies for use with liquid applied membranes . 23
4.11 Flow rates . 23
4.11.1 Requirements . 23
4.11.2 Test method . 24
4.11.3 Test arrangement . 24
5 Allocation and sequence of tests . 25
6 Marking . 27
7 Evaluation of conformity . 27
Annex A (normative) Examples of top view of the positioning of shape of test blocks applied
on the gratings . 28
Annex B (normative) Test solutions . 30
Bibliography . 32

European foreword
This document (EN 1253-8:2022) has been prepared by Technical Committee CEN/TC 165 “Waste water
engineering”, the secretariat of which is held by DIN.
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 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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.
Within its program of work, Technical Committee CEN/TC 165 requested CEN/TC 165/WG 11 “Gratings,
covers and other ancillary components for use inside buildings” to prepare the following standard:
EN 1253-8, Trapped floor gullies with combined mechanical closure and water seal.
The EN 1253 series under the main title Gullies for buildings will actually consist of the following parts:
— Part 1: Trapped floor gullies with a depth water seal of at least 50 mm;
— Part 2: Roof drains and floor gullies without trap;
— Part 3: Evaluation of conformity;
— Part 4: Access covers;
— Part 5: Gullies with light liquids closure;
— Part 6: Trapped floor gullies with a depth of water seal less than 50 mm;
— Part 7: Trapped floor gullies with mechanical closure;
— Part 8: Trapped floor gullies with combined mechanical closure and water seal.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
1 Scope
This document classifies floor gullies for domestic wastewater for use inside buildings, gives guidance,
gives guidance for places of installation and specifies requirements for the construction, design,
performance and marking of factory made gullies for buildings, irrespective of the material, for use in
drainage systems requiring a trap with combined mechanical closure and water seal (referred to as floor
gullies).
NOTE Floor gullies with combined mechanical closure and water seal are not covered by EN 1253-1,
EN 1253-6, EN 1253-7.
These products are intended to be installed where both condition below are fulfilled:
— the building does not exceed a ground-floor and three floors above;
— infrequent use could result in a water seal evaporating.
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 476, General requirements for components used in drains and sewers
EN 1253-3, Gullies for buildings — Part 3: Evaluation of conformity
EN 16323, Glossary of wastewater engineering terms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323 and the following apply.
3.1
trapped floor gully
discharge fitting the top of which is a grating or cover capable of installation at ground or floor level,
intended to receive wastewater either through apertures in the grating and/or channels joined to the
body of the gully and to drain that wastewater through the outlet
Note 1 to entry: Four generic types of floor gullies are shown in Figure 1.
Note 2 to entry: In this document, the term “trapped floor gully” includes linear products, such as channel drains.
a) Floor gully with flange for bonding b) Floor gully with flange for clamping
waterproofing membranes (example) membranes (fixed and loose flange)
(example)
c) Floor gully with flange for clamping d) Channel drain with flange for bonding
flexible flooring (e.g. PVC flooring) (example) liquid applied membranes (example)
Key
1 finished floor 10 weep hole
2 grating/cover 11 flange for bonding membranes
3 extension 12 sediment bucket
4 mechanical closure 13 connecting flange with counter flange
5 trap with water seal a fixed flange
6 depth of water seal (H) b loose flange
7 outlet 14 flange for clamping flexible flooring with a clamping ring
8 body 15 seal
9 access for cleaning 16 flange for bonding liquid applied membrane
Figure 1 — Examples of four generic types of floor gullies according to this standard
3.2
grating
removable component with apertures which permits the discharge of water
3.3
frame
support for a grating or cover which is connected to a body either directly or by means of a membrane
clamping ring or an extension
3.4
cover
removable part of an access cover which covers the opening
3.5
body
part of a floor gully below or in the floor on which the grating/frame/extension is mounted, and to which
the pipework is connected
3.6
extension
component used to adjust the height of a grating or cover above a body
3.7
joint
connection between the adjacent ends of two components including the means of sealing
3.8
membrane clamping ring
component used to clamp a membrane or a sheet floor covering to a body or extension
3.9
connecting flange
separate or an integral part of a body or of an extension which receives a membrane or sheet floor
covering
3.10
external diameter
OD
mean external diameter of the pipe at any cross section
3.11
internal diameter
ID
mean internal diameter of the pipe at any cross section
3.12
trap with combined mechanical closure and water seal
removable or integral part of the body which prevents the passage of foul air from the outlet to the inlet
by means of mechanical closure and water seal system
3.13
depth of water seal
effective height of water in the trap (H) which prevents the passage of foul air
Note 1 to entry: See Figure 1.
3.14
domestic wastewater
water polluted by the human life, including water discharged from kitchens, laundry rooms, lavatories,
bathrooms, toilets and similar facilities
[SOURCE: EN 16323:2014, 2.1.2.3]
3.15
sheet floor covering
flexible watertight finished layer for floors affixed to the flange by bonding, welding and/or by means of
a clamping ring
3.16
membrane
watertight and damp-proof layer attached to the floor gully either in the floor or on the floor
3.17
head of water
depth h of water over the frame of the floor gully
Note 1 to entry: See Figure 2.
Note 2 to entry: For floor gullies without frame, the depth of water is the lowest level over the finished floor.

Key
h head of water
Figure 2 — Head of water for floor gullies
3.18
outlet
male or female connection to the discharge pipe
3.19
nominal size
DN
numerical indication of size which is a convenient integer approximately equal to the internal diameter
(DN/ID) or the external diameter (DN/OD) in millimetres
3.20
clear opening
CO
diameter of the largest circle that can be inscribed within the unsupported area of the grating
3.21
test load
specified load which a component is required to withstand
3.22
liquid applied waterproofing kit
particular combination of a defined set of components to be installed in liquid form for waterproofing
Note 1 to entry: The liquid applied waterproofing kit is usually a paste-like composite material or a combination of
separate materials that can be poured, spread or sprayed on the subsurface by brush, roller or similar suitable
applicator.
4 Design and construction
4.1 General
Floor gullies shall be capable of being connected to the pipework system covered by relevant European
Standards, and, when installed in accordance with the manufacturer's instructions, shall form an integral
part of the building. There shall be no movement possible between the body and the floor, which would
impair the functioning of the installed gully.
The upper surfaces of frame and grating shall be flush. When in position, it shall not be possible for
gratings and covers to be dislodged from the frame, but they shall be easy to be released e.g. for
maintenance and cleaning.
Traps shall be prevented, by design features such as fixings or weights, from floating or displacement.
The functional part of a mechanical closure must be removable and allow access to clean the outlet pipe.
Floor gullies and their components shall be resistant to all mechanical and thermal requirements of
application.
Floor gullies shall be designed without side inlet.
Note Products with side inlet are described in EN 1253-1.
Floor gullies shall be delivered with installation instructions.
All pipe joints to and from the floor gully shall be designed to be watertight in accordance with EN 476.
4.2 Appearance
Internal and external surfaces shall be free from sharp edges and imperfections which could impair
functioning of the floor gully or give risk of injury.
4.3 Apertures in gratings
Apertures can be of any shape and may also be formed between grating and frame.
The dimensions of apertures in grating shall be as specified in Table 1.
Table 1 — Apertures in gratings
Dimensions of apertures in gratings
Class Minimum width Maximum width
mm mm
a
H 1,5 15 (max. 8 mm in barefoot areas)
a
K 3 10 (max. 8 mm in barefoot areas)
b
L 15 4
15 (max. 8 mm in barefoot areas)
a
Apertures of less than 4 mm width are permitted but are not included in the hydraulic tests.
b
In commercially used premises, gratings may also be used with a maximum width of apertures up to 31 mm.
4.4 Resistance of trap with mechanical closure and water seal to pressure
4.4.1 Requirements
+40
A gully with mechanical closure shall withstand a positive pressure of 400 Pa for 15 minutes. When
tested in accordance with 4.4.2. The applied pressure shall not drop beyond 90 % of the starting pressure
within 15 minutes.
4.4.2 Test method
Mount the floor gully in a test arrangement as illustrated in Figure 3, and run water through the gully
until the trap is filled.
+0
Close the flap and set a pressure of − 400 Pa by means of the bypass valves. Open the flap and fill the
−10
trap with water.
Close the flap and slowly open after about 5 ± 0,5 s. Repeat this procedure until the trap no longer loses
water, but no more than 5 times, before proceeding.
Air coming in at negative pressure is not a condition of failure.
+0,2
Remove 8 mm of water height; this corresponds to the reduction in the depth of water seal due to
0,0
evaporation over a period of disuse. If the mechanical closure is intended to prevent the evaporation of
+0,2
water, only 4 mm of water need to be removed.
0,0
Apply to the outlet side a positive pressure such that flow of air just occurs. Record the pressure.
+40
Apply to the outlet side to a positive pressure 400 Pa constant over a period of at least 15 min.
The applied pressure shall not drop beyond 90 % of the starting pressure within 15 minutes.
Interrupt the test if the pressure cannot be reached or has not stabilized within 2 min (test failed).
Verify that the mechanical closure system remains in place.
Note With the flap closed, set the desired negative pressure with the bypass valves, and read the manometer.
The sensors in the floor gully are connected to the recording device. When the flap is closed rapidly, the desired
vacuum pressure is established immediately. By reversing the fan and securing the flap in the closed position, the
arrangement can be used also for the measurement of the resistance to positive pressure.
Key
1 fan
2 bypass valves
3 flap
4 gully to be tested
4a connection to pressure recorder
4b optional connection to water level recorder
5 drain cock
6 pressure measuring device (manometer)
Figure 3 — Typical test arrangement for determining the resistance of the combined mechanical
closure and water seal to pressure
4.5 Blockage prevention
4.5.1 Access for cleaning
4.5.1.1 General
Floor gullies shall have provision for mechanical cleaning of the outlet pipe systems leading from the
gully.
Any opening provided for mechanical cleaning shall be tested in accordance with 4.5.1.3.
4.5.1.2 Requirements
When an opening with an airtight and watertight cover or plug is provided, the clear diameter of such
opening shall be as specified in Table 2.
Table 2 — Access for cleaning
Outlet of gully Access for cleaning
Diameter of outlet Clear opening C Area A
mm mm mm
DN ≤ 80 C > 20 A > 800
80 < DN ≤ 110 C > 32 A > 800
110 < DN ≤ 200 C > 50 A > 1 900
4.5.1.3 Test method
Demount and remount those parts of the floor gully which are designed for cleaning access to the floor
gully itself and/or to the pipework to which it is connected and verify the fulfilment of the requirements
according to 4.5.1.2.
4.5.2 Clogging test
4.5.2.1 Requirements
The floor gullies and their components shall show no visible deformation or damage which could affect
their fitness for use/which impair their function (odour-tightness and resistance to pressure).
After the test, the functional characteristics shall be maintained. The floor gully shall comply with 4.4.1
and 4.9.1.1.
NOTE The test consists of subjecting the floor gully to number of cycles in order to establish its behaviour over
time.
4.5.2.2 Test method
Mount the floor gully in a test arrangement as illustrated in Figure 4 a).
The arrangement shall be placed in such a way that the fibres of the test solution will flow towards the
gully.
Connect a suitable pipe to the outlet of the floor gully.
Prepare the test solution as indicated in Annex B.
1) Carry out the following cycle 600 times (1 day of test):
— Flow rate between 0,12 l/s and 0,20 l/s of test solution at (35 ± 5) °C for (30 ± 2) s;
— Pause for (30 ± 2) s.
2) Break (night) of 12 h to 24 h.
If applicable, the grating shall be cleaned after 600 cycles and fibres shall be returned to the tank.
Repeat 5 times steps 1 and 2 (5 days of test).
3) Break (weekend) of 48 h to 72 h (1st week of test).
4) Renew the test solution and repeat the steps 1 and 2 (2nd week of test).
5) At the end of this test (within 3 days), check the resistance to pressure in accordance with the test in
4.4 and the odour-tightness in accordance with the test in 4.9.1.
6) The fibre used for the test shall be recorded in the test report.
Dimensions in millimetres
a) Test setup
b) Test specimen shown with vertical outlet
Key
1 tank filled with the test solution shaped to avoid sedimentation
2 pump which does not affect the test solution e.g. membrane or screw pump
3 pump provided with controllable flow rate which does not affect the test solution e.g. membrane or screw pump
4 inclined channel (gradient 1,5 % ± 0,1 %)
5 test specimen shown with the option for either a horizontal or vertical outlet
a
finished floor
Figure 4 — Test arrangement
4.6 Places of installation
A guide for selecting the class of a floor gully appropriate to the place of installation is given below. The
selection of the appropriate class is the responsibility of the specifier.
a) Class H 1,5: Areas where load is only expected due to maintenance is expected.
b) Class K 3: Areas without vehicular traffic, such as dwellings, commercial and some public buildings.
c) Class L 15: Areas with light vehicular traffic, such as in commercially used premises and public areas.
All gratings shall as a minimum conform to the test requirements given in 4.10.1.2 for class H 1,5. More
highly rated gratings can be used if required.
4.7 Materials
Materials shall withstand a maximum intermittent wastewater temperature of 95 °C.
Materials shall withstand the stresses likely to occur during installation and operation.
Floor gullies made of materials which are not inherently corrosion-resistant shall be protected by
corrosion prevention treatment.
4.8 Thermal behaviour of floor gullies
4.8.1 General
This test simulates use under conditions of extreme water temperatures and establishes the integrity of
the complete product.
Floor gullies shall be classified as follows:
— Class A: Application in any place of installation;
— Class B: Application restricted to bathrooms in private dwellings, with connection to outlet pipes
DN 40 to DN 75.
4.8.2 Requirements
The floor gullies and their components shall show no visible deformation or change in the components'
surface structure which could affect their fitness for use.
The floor gullies shall satisfy the requirements for tightness (4.9.1 and 4.9.2).
4.8.3 Test method
Mount the floor gully in accordance with Figure 5. Connect a suitable pipe to the outlet of the floor gully
(the outlet shall be open all the time). When different versions of the same components exist, the test
shall be done for the least favourable of their combinations.
Admit water through the grating as follows:
1) (0,5 ± 0,05) l/s of hot water at (93 ± 2) °C for (60 ± 2) s;
2) pause for (60 ± 2) s;
3) (0,5 ± 0,05) l/s of cold water at (15 ± 10) °C for (60 ± 2) s;
4) pause for (60 ± 2) s.
Repeat this cycle 1 500 times (100 h) for class A products and 360 times (24 h) for class B products.
Check to ensure th
...