prEN 1253-8

Gullies for buildings - Part 8: Trapped floor gullies with combined mechanical closure and water seal

This document classifies floor gullies for use inside buildings, 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 Part 1, Part 6, Part 7.
These products are intended to be installed where:
- the building does not exceed a ground-floor and three floors above.

Abläufe für Gebäude - Teil 8: Bodenabläufe mit Geruchverschluss mit mechanischem Geruchverschluss und Wassergeruchverschluss

Dieses Dokument klassifiziert Bodenabläufe für den Einsatz innerhalb von Gebäuden, gibt eine Anleitung hinsichtlich der Einbaustellen und legt Anforderungen an die Konstruktion, Ausführung, Funktion und Kenn-zeichnung von werkmäßig hergestellten Abläufen für Gebäude, unabhängig vom Werkstoff, zur Verwendung in Entwässerungsanlagen mit einer Kombination aus mechanischem Geruchverschluss und Sperrwasser (im Folgenden als Bodenabläufe bezeichnet) fest.
ANMERKUNG Kombinierte Bodenabläufe mit mechanischem Geruchverschluss und Sperrwasser werden in Teil 1, Teil 6 und Teil 7 nicht behandelt.
Diese Produkte sind für den Einbau in den folgenden Fällen bestimmt:
 das Gebäude weist neben dem Erdgeschoss nicht mehr als drei Stockwerke auf.

Avaloirs et siphons pour bâtiments - Partie 8 : Siphons de sol combinant un système d'obturation mécanique et une garde d'eau

Le présent document classifie les siphons de sol utilisés à l’intérieur des bâtiments, fournit des recommandations pour les lieux d’installation et spécifie les exigences concernant la construction, la conception, les performances et le marquage des siphons de sol pour bâtiments fabriqués en usine, indépendamment des matériaux, destinés à être utilisés dans les réseaux d’évacuation nécessitant un siphon de sol combinant un obturateur mécanique et une garde d’eau (appelés « siphons de sol » dans le reste du document).
NOTE Les siphons de sol combinant un obturateur mécanique et une garde d’eau ne sont pas traités dans les Parties 1, 6 et 7.
Ces produits sont destinés à être installés lorsque :
⎯ la hauteur du bâtiment ne dépasse pas un rez-de-chaussée surmonté de trois étages.

Odtoki v stavbah - 8. del: Talni odtoki s kombinirano mehansko smradno zaporo in zaporo vode

General Information

• Status: Not Published
• ICS: 91.140.80 - Drainage systems
• Technical Committee: CEN/TC 165 - Waste water engineering
• Drafting Committee: CEN/TC 165/WG 11 - Waste fittings
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 26-Apr-2022
• Completion Date: 26-Apr-2022
• Ref Project: oSIST prEN 1253-8:2020 - Gullies for buildings - Part 8: Trapped floor gullies with combined mechanical closure and water seal

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 1253-8:2020
01-september-2020
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: prEN 1253-8
ICS:
91.140.80 Drenažni sistemi Drainage systems
oSIST prEN 1253-8:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1253-8:2020
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oSIST prEN 1253-8:2020
DRAFT
EUROPEAN STANDARD
prEN 1253-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
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 système d'obturation mécanique Geruchverschluss mit mechanischem Geruchverschluss

et une garde d'eau und Wassergeruchverschluss

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 165.

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, Turkey 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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1253-8:2020 E

worldwide for CEN national Members.
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Contents Page

4.1 General ................................................................................................................................................................ 8

4.2 Appearance ........................................................................................................................................................ 8

4.3 Apertures in gratings ..................................................................................................................................... 8

4.4 Resistance 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 Anti-blockage (clogging test) ................................................................................................................... 11

4.6 Places of installation ................................................................................................................................... 13

4.6.1 General ............................................................................................................................................................. 13

4.6.2 Exceptions ....................................................................................................................................................... 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 .................................................................................................................................... 16

4.10.1 Loading strength........................................................................................................................................... 16

4.10.2 Clamping ring strength .............................................................................................................................. 19

4.10.3 Additional mechanical strength according to the installation .................................................... 19

4.11 Flow rates ........................................................................................................................................................ 22

4.11.1 Principle .......................................................................................................................................................... 22

4.11.2 Requirements ................................................................................................................................................ 23

4.11.3 Test method ................................................................................................................................................... 23

4.11.4 Test arrangement ......................................................................................................................................... 23

Annex A (normative) Sequence of the tests ....................................................................................................... 26

Annex B (normative) Examples of top view of the positioning of shape of test blocks applied

on the gratings ............................................................................................................................................... 27

Annex C (normative) Test solution ....................................................................................................................... 29

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European foreword

This document (prEN 1253-8:2020) has been prepared by Technical Committee CEN/TC 165 “Waste

water engineering”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.

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.

Since the versions of EN 1253-1 and EN 1253-2, the most significant technical changes are the

following:
a) grouping of “Requirements” and “Test method” articles for a test;

b) adding Annex B with Examples of top view of the positioning of shape of test blocks applied on the

gratings;
c) adding tolerance;
d) adding a clogging test.
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1 Scope

This document classifies floor gullies for use inside buildings, 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 Part 1, Part 6,

Part 7.
These products are intended to be installed where:
— the building does not exceed a ground-floor and three floors above
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 124 (all parts), Gully tops and manhole tops for vehicular and pedestrian areas

EN 476, General requirements for components used in drains and sewers
EN 1253-3, Gullies for buildings — Part 3: Evaluation of conformity
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:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
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: See Figure 1.

Note 2 to entry: In this document, the term trapped “floor gully” includes linear products, such as channel

drains.
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a) Floor gully with side inlets and flange for b) Floor gully with flange for clamping

bonding membranes (example) membranes (fixed and loose flange) (example)

c) Floor gully with side inlets and flange for d) Channel drain with flange for bonding

clamping flexible flooring (e.g. PVC flooring) liquid applied membranes (example)

(example)
Key
1 finished floor 9 weep hole
2 grating/cover 10 flange for bonding membranes
3 extension 11 sediment bucket
4 trap 12 connecting flange with counter flange
5 depth of water seal (H ≥ 50 mm) a fixed flange
6 outlet b loose flange
7 body 13 flange for clamping flexible flooring with a clamping
ring
14 seal
8 access for cleaning 15 flange for bonding liquid applied membrane
Figure 1 — Types of floor gullies
3.2
grating
removable component with apertures which permits the discharge of water
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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
mean external diameter of the pipe barrel at any cross section
3.11
internal diameter
mean internal diameter of the pipe barrel at any cross section
3.12
trap with mechanical closure

removable part of the body which prevents, by means of mechanical closure system, the passage of foul

air from the outlet to the inlet
3.13
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]
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3.14
sheet floor covering

flexible watertight finished layer for floors affixed to the flange by bonding, welding and/or by means of

a clamping ring
3.15
membrane

watertight and damp proof layer attached to the floor gully either in the floor or on the floor

3.16
head of water
depth h of a water line 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 line is the lowest level over the finished

floor.
Key
h head of water
Figure 2 — Head of water for floor gullies
3.17
outlet
male or female connection to the discharge pipe
3.18
nominal size

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
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3.19
clear opening

diameter of the largest circle that can be inscribed within the unsupported area of the grating

3.20
test load
specified load which a component is required to withstand
3.21
liquid applied waterproofing kit

particular combination of a defined set of components to be installed in liquid form for waterproofing

by application and/or incorporation and/or joining of the components in accordance with particular

design methods

Note 1 to entry: The liquid applied watertight 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.

In areas where pressure testing of the pipe system is necessary floor gullies for use in the ground floor

shall enable such test to be performed.

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 for e.g.

maintenance and cleaning.

Traps with combined mechanical closure and water seal shall be prevented, by design features such as

fixings or weights, from uncontrolled floating or becoming displaced.

Without water, the mechanical closure shall ensure the functionality of the floor gully where water trap

is subjected to evaporation.

Floor gullies and their components shall be resistant to normal actions of mechanical and thermal

character.
Floor gullies may be designed without side inlet.
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 holes or slots of any shape and may also be formed between grating and frame.

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By means of suitable measuring instruments or balls of suitable sizes, 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
H 1,5 b 15 (max. 8 mm in barefoot areas)
K 3 b 0 (max. 8 mm in barefoot areas)
a 4 15 (max. 8 mm in barefoot areas)
L 15

In commercially used premises, gratings may also be used with a maximum width of apertures up to 31 mm.

Apertures of less than 4 mm width are permitted but shall not form part of the hydraulic tests.

4.4 Resistance to pressure
4.4.1 Requirements
The applied pressure shall be +400 Pa.
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.

Close the flap and set a pressure of −400 Pa by means of the bypass valves. Open the flap and fill the

trap with water.

Close the flap and slowly open after about 5 s. Repeat this procedure until the trap no longer loses

water, but no more than 5 times.
Air coming in at negative pressure is not a condition of failure.

Remove 8 mm of water height; this corresponds to the reduction in the depth of water seal due to

evaporation over a period of disuse.

Apply to the outlet side a positive pressure such that flow of air just occurs. Record the pressure.

Apply to the outlet side to a positive pressure 400 Pa (−0/+10 %) constant over a period of at least

15 min.
The pressure may not drop beyond 90 % of the starting pressure.

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.

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.
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Key
1 fan
2 bypass valves
3 flap
4 water seal
4a connection to pressure recorder
4b connection to water level recorder
5 drain cock
6 pressure measuring device (manometer)

Figure 3 — Typical test arrangement for determining the resistance of water seals to pressure

4.5 Blockage prevention
4.5.1 Access for cleaning
4.5.1.1 General

Floor gullies should have provision for mechanical cleaning of the outlet pipe systems leading to and

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
DN Dimensions of access for cleaning (mm)
DN ≤ 110 Ø > 32
125 ≤ DN ≤ 200 Ø > 50
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.
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4.5.2 Anti-blockage (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

and 4.9.1.

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 4a).

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 D.
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 cellulose fibres shall be returned to

the tank.
Repeat 5 times steps 1 and 2 (5 d of test).
3) Break (week-end) of 48 h to 72 h (1 week of test).
4) Renew the test solution and repeat the steps 1 and 2 (2 weeks of test).

5) At the end of this test (within 3 d), 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.
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Dimensions in millimetres
a) Test setup
b) test specimen shown with horizontal/vertical outlet
Key
1 12 l tank filled with the test solution with a shape 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 ± 1,5 %)
5 test specimen shown with horizontal/vertical outlet
a finished floor
Figure 4 — Test arrangement (Placeholder)
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4.6 Places of installation
4.6.1 General

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 no load 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.
4.6.2 Exceptions

Non-load bearing gratings for places of installation which are not accessible to vehicles and pedestrians

(protected by suitable masonry surroundings) and which are not covered by the places of installation

listed above nor by EN 124 shall at least conform to the test requirements given in 4.10.1 for class H 1,5.

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 only for 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;
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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 that there is no deformation or change in surface texture of any component which

would impair the fitness for use.

This test does not apply to floor gullies made exclusively of metallic materials.

4.8.4 Additional test for floor gullies for use with sheet floor coverings and liquid applied

membranes

This additional test shall be applied to floor gullies intended for installation in floor constructions

where the floor covering is a watertight material. The floor covering may be connected to the floor gully

by bonding, bonding and a clamping ring combination, or by a clamping ring alone.

Mount the floor gully in the test box in accordance with the manufacturer's instructions.

Cover the entire internal surface of the box with sheet floor covering of the thickness which the floor

gully manufacturer states is the thickness for which the floor gully is designed. If the floor gully is

designed for a number of different thicknesses of sheet floor covering, it may be necessary to carry out

several tests. When applying the covering the instructions of the sheet floor covering manufacturer are

to be followed.

A moisture indicator is fitted to the bottom of the box at the opening where the floor gully is placed.

Admit water to the floor gully via the floor covering and grating as shown in Figure 5.

Supply water 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.

During the test the outlet of the floor gully shall be closed when water is being supplied, and open

during pauses. Water will back up by approximately 80 mm in the box.

The outlet of the floor gully shall be connected to a pipe of 1 m length of the same DN as the outlet, laid

at a gradient of (1,5 ± 0,1) % to the horizontal.
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Dimensions in millimetres
Key
1 hot and cold water supply for testing the floor gully
2 hot and cold water supply for testing sheet floor covering connection
3 outlet

Figure 5 — Test box for temperature cycling and for testing floor gullies for use with sheet floor

coverings
4.9 Tightness
4.9.1 Odour-tightness
4.9.1.1 Requirements
The pressure shall not drop below 180 Pa over a period of at least 15 min.
4.9.1.2 Test method

Before conducting the test, dismantle and then reassemble the floor gully. Check that all parts are

correctly fitted.
Use the same or a similar test arrangement as shown in Figure 6.

Ensure that the temperatures of the floor gully, the water in the water seal and the room shall not vary

by more than ± 2 °C during the test.

Connect the floor gully to an airtight pipe arrangement with a volume of approximately 2,0 l.

Fill the trap with water. Apply a positive pressure of 200 Pa through the outlet. When the pressure is

stable, close the valve.

Interrupt the test if the pressure has not stabilized within 2 min (test failed).

Verify leakage as the decrease in sta
...