EN 13451-3:2020

Swimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features installed in pools for public use

This document specifies safety requirements and test methods for inlets and outlets for water/air and water/air based leisure features involving water movement, in addition to the general safety requirements of EN 13451-1.
The requirements of this specific standard take priority over those in EN 13451-1.
This part of EN 13451 is applicable to swimming pool equipment installed in pools for public use designed for:
-   the introduction and/or extraction of water for treatment or leisure purposes;
-   the introduction of air for leisure purposes;
-   water leisure features involving the movement of water.
NOTE   The above items are identified with the general term devices.

Schwimmbadgeräte - Teil 3: Zusätzliche besondere sicherheitstechnische Anforderungen und Prüfverfahren für Ein- und Ausläufe sowie Wasser-Luftattraktionen

Dieses Dokument legt zusätzlich zu den allgemeinen sicherheitstechnischen Anforderungen nach EN 13451 1 sicherheitstechnische Anforderungen und Prüfverfahren für Wasser /Lufteinläufe und  ausläufe sowie für Wasserattraktionen in Verbindung mit Luft/Wasser, die eine Wasserbewegung bewirken, fest.
Die Anforderungen dieser besonderen Norm haben Vorrang gegenüber denen in EN 13451 1.
Dieser Teil der EN 13451 gilt für Schwimmbadgeräte, die in öffentlich genutzten Schwimmbädern installiert und ausgelegt sind für:
   den Einlauf und/oder Auslauf von Wasser für die Wasseraufbereitung oder für Wasserattraktionen;
   den Einlauf von Luft für Wasserattraktionen;
   Wasserattraktionen, die Wasser in Bewegung setzen.
ANMERKUNG   Die oben genannten Gegenstände werden nachfolgend mit dem allgemeinen Begriff „Bauteil“ bezeichnet.

Équipement de piscine - Partie 3: Exigences de sécurité et méthodes d'essai complémentaires spécifiques aux pièces d'aspiration et de refoulement et aux équipements de loisirs aquatiques disposant d’introduction et d’extraction d’eau/d’air, installés dans les piscines destinées à un usage public

Le présent document spécifie les exigences de sécurité et les méthodes d’essai applicables aux pièces d’aspiration et de refoulement d’eau/d’air et aux équipements de loisirs aquatiques disposant d’introduction et d’extraction d’eau/d’air impliquant un mouvement d’eau, en complément des exigences générales de sécurité de l’EN 13451 1.
Les exigences de la présente norme spécifique ont la priorité sur celles de l’EN 13451 1.
La présente partie de l’EN 13451 est applicable aux équipements de piscine installés dans les piscines destinées à un usage public conçus pour :
—   l’introduction et/ou l’extraction d’eau à des fins de traitement ou de loisirs ;
—   l’introduction d’air à des fins de loisirs ;
—   les équipements de loisirs aquatiques impliquant le mouvement de l’eau.
NOTE   Les éléments ci-dessus sont identifiés par le terme général dispositifs.

Oprema za plavalne bazene - 3. del: Dodatne posebne varnostne zahteve in preskusne metode za bazenski pribor za pripravo vode, vgrajen v javne bazene

General Information

• Status: Not Published
• ICS: 97.220.10 - Sports facilities
• Technical Committee: CEN/TC 136 - Sports, playground and other recreational equipment
• Drafting Committee: CEN/TC 136/WG 8 - Swimming pool equipment
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Due Date: 19-Jul-2020
• Completion Date: 19-Jul-2020
• Ref Project: kSIST prEN 13451-3:2020 - Swimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features installed in pools for public use

RELATIONS

• Revised: EN 13451-3:2011+A3:2016 - Swimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features
• Effective Date: 30-Aug-2017

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 13451-3:2019
01-april-2019
Oprema za plavalne bazene - 3. del: Dodatne posebne varnostne zahteve in
preskusne metode za bazenski pribor za pripravo vode, vgrajen v javne bazene

Swimming pool equipment - Part 3: Additional specific safety requirements and test

methods for inlets and outlets and water/air based water leisure features installed in

pools for public use
Schwimmbadgeräte - Teil 3: Zusätzliche besondere sicherheitstechnische

Anforderungen und Prüfverfahren für Ein- und Ausläufe sowie Wasser-Luftattraktionen

Équipement de piscine - Partie 3: Exigences de sécurité et méthodes d'essai
complémentaires spécifiques aux pièces d'aspiration et de refoulement et aux

équipements de loisirs aquatiques disposant d’introduction et d’extraction d’eau/d’air,

installés dans les piscines destinées à un usage public
Ta slovenski standard je istoveten z: prEN 13451-3
ICS:
97.220.10 Športni objekti Sports facilities
oSIST prEN 13451-3:2019 en,fr,de

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

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oSIST prEN 13451-3:2019
DRAFT
EUROPEAN STANDARD
prEN 13451-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2019
ICS 97.220.10 Will supersede EN 13451-3:2011+A3:2016
English Version
Swimming pool equipment - Part 3: Additional specific
safety requirements and test methods for inlets and
outlets and water/air based water leisure features
installed in pools for public use

Équipement de piscine - Partie 3: Exigences de sécurité Schwimmbadgeräte - Teil 3: Zusätzliche besondere

et méthodes d'essai complémentaires spécifiques aux sicherheitstechnische Anforderungen und

pièces d'aspiration et de refoulement et aux Prüfverfahren für Ein- und Ausläufe sowie Wasser-

équipements de loisirs aquatiques disposant Luftattraktionen
d'introduction et d'extraction d'eau/d'air, installés
dans les piscines destinées à un usage public

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

CEN/TC 136.

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, 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.

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13451-3:2019 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Safety requirements ....................................................................................................................................... 6

5 Test methods ................................................................................................................................................. 16

6 Documentation .............................................................................................................................................. 24

Annex A (informative) Calculation of water speed at the design stage ................................................. 25

A.1 General ............................................................................................................................................................. 25

A.2 Calculation methods .................................................................................................................................... 25

A.3 Test methods ................................................................................................................................................. 25

A.3.1 Test equipment ............................................................................................................................................. 25

A.3.2 Test procedure .............................................................................................................................................. 26

A.3.3 Analysis ............................................................................................................................................................ 26

A.4 Design stage ................................................................................................................................................... 26

A.4.1 General ............................................................................................................................................................. 26

A.4.2 Calculation ...................................................................................................................................................... 26

A.4.3 Measurement ................................................................................................................................................. 26

A.5 Suction points in operation ...................................................................................................................... 27

A.5.1 General ............................................................................................................................................................. 27

A.5.2 Calculation ...................................................................................................................................................... 27

A.5.3 Measurement ................................................................................................................................................. 27

Annex B (normative) Entrapment of hair in slits .......................................................................................... 28

B.1 Testing equipment ....................................................................................................................................... 28

B.2 Test method ................................................................................................................................................... 28

B.3 Evaluation ....................................................................................................................................................... 28

Bibliography ................................................................................................................................................................. 29

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European foreword

This document (prEN 13451-3:2019) has been prepared by Technical Committee CEN/TC 136 “Sports,

playground and other recreational facilities and equipment”, the secretariat of which is held by DIN.

This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13451-3:2011+A3:2016.
The European Standard EN 13451 Swimming pool equipment consists of:

— Part 1: General safety requirements and test methods for equipment installed in pools for public use;

— Part 2: Additional specific safety requirements and test methods for ladders, stepladders and handle

bends;

— Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air

based water leisure features;

— Part 4: Additional specific safety requirements and test methods for starting platforms;

— Part 5: Additional specific safety requirements and test methods for lane lines;

— Part 6: Additional specific safety requirements and test methods for turning boards;

— Part 7: Additional specific safety requirements and test methods for water polo goals;

— Part 10: Additional specific safety requirements and test methods for diving platforms, diving

springboards and associated equipment;

— Part 11: Additional specific safety requirements and test methods for moveable pool floors and

moveable bulkheads.
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1 Scope

This document specifies safety requirements and test methods for inlets and outlets for water/air and

water/air based leisure features involving water movement, in addition to the general safety

requirements of EN 13451-1.

The requirements of this specific standard take priority over those in EN 13451-1.

This part of EN 13451 is applicable to swimming pool equipment installed in pools for public use

designed for:
— the introduction and/or extraction of water for treatment or leisure purposes;
— the introduction of air for leisure purposes;
— water leisure features involving the movement of water.
NOTE The above items are identified with the general term devices.
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 1069-1, Water slides — Part 1: Safety requirements and test methods

EN 13451-1:2011+A1:2016, Swimming pool equipment — Part 1: General safety requirements and test

methods
EN 15288-2, Swimming pools — Part 2: Safety requirements for operation
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13451-1 and the following

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
floor/wall inlet

device designed to be installed into the pool floor/wall for introducing water/air in the pool

3.2
floor water outlet

device designed to be installed into the pool floor, for the extraction of water, by gravity or by suction

3.3
wall water outlet

device designed to be installed into the pool wall for the extraction of water, by gravity or by suction

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3.4
sump

vessel between the suction outlet grille and the suction outlet piping, manufactured or field built

3.5
skimmer

device designed to skim the uppermost layer of water only and return it to the filtration system

3.6
overflow channel

channel to take in the overflowing water of the related basin, as part of the filtration circuit

Note 1 to entry: An overflow channel may be located, e.g. at deck level; built into the basin wall.

3.7
grille

component to cover any opening, designed to allow the passage of water and/or air

EXAMPLE A grille may be an inlet grille, an outlet grille, an overflow channel grille, a deck level channel grille.

3.8
cover

protection device or assembly that separates the user from hazards caused by an opening

3.9
water speed
water flow through velocity in the open cross section of an opening
3.10
air speed
air flow through velocity in the open cross section of an opening
3.11
open cross section of a grille

sum of all single open sections of the grille as designed through which the corresponding flow rate can

flow
3.12
water operated leisure feature

feature intended for playing and/or relaxing, formed as a result of water, being emitted either into or

from a swimming pool

EXAMPLE Waves, water cannons, rain sprays, waterfalls, mushrooms and rapid rivers.

3.13
air operated leisure feature

feature intended for playing and/or relaxing formed as a result of air, being emitted into swimming pool

water
EXAMPLE Geysers, bubble seats.
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3.14
air and water operated leisure feature

feature intended for playing and/or relaxing formed as a result of air and water, being concurrently

emitted into or from a swimming pool
EXAMPLE Hydromassages.
3.15
integrated swim jet system

device that incorporates suction outlet and inlet in a single housing that is designed to move a large

volume of water at high velocity one directional
3.16
gravity feed tank

tank that is filled by pool water flowing by gravity only, intended as a separation element between the

pool and the suction pump(s)
3.17
vacuum release system

system or device capable of providing vacuum release at a suction outlet in case of a high vacuum

occurrence due to suction outlet flow blockage
3.18
vortex pool
pool characterised by swirling water movement
3.19
suction group

system of more than one pump which suction inlets are hydraulically connected by a collector

3.20
nominal flow rate

water flow rate specified by the pool hydraulic systems designer to optimize the installation operation

4 Safety requirements
4.1 General

As the components defined in Clause 3 are integral parts of an overall system, special attention shall be

paid to the system design criteria, especially taking into consideration the interaction between different

components.

Where leisure water features are created by the introduction of air and/or water under pressure into

the pool water, the safety of the users shall be provided by means of a risk assessment according to

EN 15288-2, including consideration of their design, location, method of operation, warning signals and

supervision (see also prEN 17232:2019 concerning water play equipment and features).

4.2 Structural integrity
4.2.1 Floor inlets
Floor inlets shall be tested for:
— vertical load and deformation, according to 5.2.2;
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— horizontal load and deformation, if applicable, according to 5.2.3;
— point load according to 5.2.4;
— shear load, if applicable according to 5.2.5.
4.2.2 Wall inlets
Wall inlets shall be tested for:
— horizontal load and deformation, if applicable, according to 5.2.3;
— point load according to 5.2.4;
— shear load, if applicable, according to 5.2.5.
4.2.3 Floor and wall water outlets
Floor and wall water outlets shall be tested for:
— vertical load and deformation, according to 5.2.2;
— horizontal load and deformation, if applicable, according to 5.2.3;
— point load according to 5.2.4;
— shear load, if applicable, according to 5.2.5;
— vacuum and point impact according to 5.2.6;
— hair entrapment in accordance with 5.3.
4.2.4 Grilles
4.2.4.1 General

Grilles and their substructure shall be designed to withstand the load according to

EN 13451-1:2011+A1:2016, A.2.2 related to their shape (point, line or area load).

If grilles are not subject to users’ loads, then A.2.2 does not apply.

Floor grilles shall be tested for vertical and horizontal loads, deformations and point load, in accordance

with 5.2.2, 5.2.3, and 5.2.4. Grille parts of floor inlet or outlet are already covered with 4.2.1.

Wall grilles shall be tested for horizontal load, deformation and point load, in accordance with 5.2.3 and

5.2.4. Grille parts of wall inlet or outlet are already covered with 4.2.2.
If applicable, 5.2.5 and 5.2.6 shall also apply.

In case of manufactured substructures (e.g. overflow channel) also the complete assembly of grill and

substructure shall be tested for vertical load and deformation in accordance with 5.2.2.

4.2.4.2 Grilles for overflow channels

Grilles made up from separate elements shall remain interconnected under conditions of use.

Grilles shall be designed to remain in position and to prevent their movement when subject to normal

conditions of use.
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4.2.5 Skimmer weir

As the floating weir is an essential component for skimming the uppermost layer of the water only, it

shall be always properly working. It shall be removable only by intentional manoeuvre or with the use

of tools.
4.2.6 Skimmer top covers

If the upper part of the skimmers and/or their top cover are placed in a walkable area, it shall be

designed to withstand the load according to EN 13451-1:2011+A1:2016, A.2.2.Lids shall be removable

only by intentional manoeuvre or with the use of tools.

Skimmer top covers shall be tested for vertical load and deformation according to 5.2.2.

4.2.7 Overflow channels

When the overflow channel is designed to be covered by a grille, the supporting structure of the grille

shall withstand the same load as the grille itself.
They shall pass the load test in accordance with 5.2.2.
4.3 Water speed at inlets

The water speed at inlets shall be ≤ 15 m/s, except for vertical injection from the swimming pool floor

in water depth < 700 mm, where it shall be ≤ 2 m/s.
NOTE Typical values of water speed are:
— inlet for circulation for water treatment purposes: ≤ 4 m/s;
— water leisure features (e. g. hydromassages, swim jets and cannons) ≤ 15 m/s.
For water speed test see Annex A.
4.4 Hair entrapment

Wall water outlets and floor water outlets shall pass the hair entrapment test in accordance with 5.3.

4.5 Slip resistance of grilles

Slip resistance of any walkable grilles shall comply with the requirements in accordance with

EN 13451-1:2011+A1:2016, Table 1.
4.6 Risk of suction entrapment
4.6.1 General

Suction systems either with suction pumps or gravity tanks shall be designed and installed so as to

reduce the potential for entrapment of the user.
Water speed at outlets shall be ≤ 0,5 m/s.

NOTE 1 There is a direct correlation between the risk of suction and hair entrapment and high water speeds

through outlets. It is advised to keep water speed as low as possible, taking into consideration hydraulic technical

requirements (e.g. avoid stagnation).

Valves fitted on pipes connecting suction outlet(s) to pump(s) shall not be accessible to unauthorized

people (users and inexperienced staff).
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The water speed is obtained with the following formula:
Where:

— v is the water speed calculated through any openings of the suction grille, in metre per second;

— Q is the flow rate measured in the pipe connected to the suction grille, in cubic metre per second;

— A is the total free openings surface of the suction device grille, provided by the manufacturer of the

suction device grille, in square metre.

NOTE 2 It is advised to take into account a safety factor for debris and construction tolerances when

considering the free opening surface of the grille.
Additionally at least one of the either a) or b) shall be met:

a) in case of suction outlet systems with only one grille, suction outlet shall be designed in such a way

that:

— only single grilles with a surface of the area circumscribed to the suction openings ≥ 1 m (see

Figure 2) are allowed, or

— A rectangular template representing an adult torso sized 65,5 x 36,0cm, with 4x50mm radius

corners shall not cover more than 50 % of the free projected suction surface. In that case, the water

speed at the remaining free opening surface shall not exceed 0,8 m/s.

b) when more than one suction outlet is connected to a single pump (or single suction group), suction

outlets shall be designed in such a way that :

1) the distance between the nearest points of the perimeters of the devices is ≥ 2 m, and;

2) at least 50 % of the free projected cumulated suction surface, connected to the same pump (or

single suction group) remains not covered when applying a rectangular template representing

an adult torso sized 65,5 x 36cm, with 4x50mm radius corners on any suction outlet (see

Figure 1); and;
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Dimensions in millimetres
a) Pass, less than 50 % of the free projected suction surface is covered
b) Fail, more than 50 % of the free projected suction surface is covered
Key
1 suction outlet system grille (in 3 dimensions)
2 free projected suction surface (in 2 dimensions)
3 rectangular template representing an adult torso

Figure 1 — Determination of the free projected suction surface of a suction outlet system grille

3) if any one of the suction outlet becomes blocked, the entire hydraulic system connected to the

remaining suction outlets shall be designed to accommodate 100 % of the nominal flow rate. In

this case the water speed at the remaining outlets shall not exceed 0,8 m/s,

NOTE 3 This requirement is to prevent a vacuum from being created in the hydraulic system in the event

one of the outlets gets blocked.

If the outlet system is designed to operate either with multiple suction outlets or with a single suction

outlet (e.g. by means of valves), then both requirements a) and b) shall be met.

Suction connexion points for cleaners shall not be taken into account in the total number of suction

outlets.
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Figure 2 — Identification of the area circumscribed to the suction openings
NOTE 4 It is advised to determine frequency of testing by risk assessment.

When retrofitting existing installations that have a single suction outlet which does not comply with the

requirements of this clause, then the following actions are required:

— the existing suction outlet shall be retrofitted with a grille conforming to a), or;

— one or more additional suction outlets shall be provided as in b) .

In addition to the requirements in a) or b), a vacuum release system may be provided.

NOTE 5 These devices/systems are not considered “fail safe” systems as there is no known suction vacuum

release system that will completely protect against all outlet entrapment hazards. Presenting Vacuum Release

Systems as “fail safe” systems would promote a false sense of security among the users of these devices/systems.

Safety requirements a) to b) are not applicable to:

— skimmers, because they are vented (see 4.6.3) and partly above the water level;

— integrated swim jet systems, because the users are pushed away from the outlet by the action of the

inlet.

— suction connexion points for cleaners as they shall not be used when bathers are in the pool.

NOTE 6 It is advised to install at the deck an accessible general emergency switch for the pumps level.

4.6.2 Sump
4.6.2.1 Manufactured sump for floor and wall water outlets

The combination of the manufactured sump and its corresponding grille shall be designed to provide a

uniform water speed distribution through the grille and avoid vortex effect.

This combination shall fulfil the safety requirements of 4.4 (hair entrapment) and 4.6.1 (suction

entrapment)
4.6.2.2 Field build sumps for floor and wall water outlets

For field built sump using a prefabricated grille, the grille manufacturer shall provide dimensional

instructions for the implementation of the sump to ensure that the assemblies fulfil the safety

requirements of 4.4 (hair entrapment) and 4.6.1 (suction entrapment).

The sump shall be designed to provide a uniform water speed distribution and avoid vortex effect.

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Examples of typical sumps are shown in Figure 3.
Key
a indicates suggested sump configuration
D inside diameter of the pipe
D dimension ≥ D
min
Figure 3 — Examples of sump designs
4.6.3 Skimmers

Skimmers shall be effectively vented to atmosphere through opening(s) in the lid (see Figure 4), or

through a separate vent pipe.
Key
1 vent trough lid
Figure 4 — Skimmer, vent through lid

Skimmers shall fulfil all the general entrapment requirements in accordance with EN 13451-1;

otherwise they shall be subjected to a specific risk assessment.
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4.7 Positioning of leisure features
4.7.1 General

The positioning of leisure features shall be considered as part of the risk assessment in accordance with

EN 15288-2. It shall also consider the awareness of the users.

The leisure features shall be installed in such a way that their effects cannot cause unwanted

interference with the effects of other features or cause hazards to other users of the pool.

Where features involving the introduction of water into the swimming pool are installed outside the

pool, users shall be informed and/or warned.

Where a feature incorporates a change of depth (e.g. a submerged step) it shall be marked by

contrasting colour.
4.7.2 Introduction of water and/or air from the floor

Features incorporating the introduction of water and/or air under pressure from the swimming pool

floor shall not be installed in depths of less than 700 mm unless:
a) the vertical water speed is ≤ 2 m/s (see 4.3); and
b) the dynamic pressure in the system before the inlet is ≤ 30 kPa.

NOTE These requirements do not apply to balneotherapy equipment such as seats, benches and lounges.

For water speed test see Annex A.
4.7.3 Influence of features on the users

The introduction of water and/or air under pressure shall not compromise the safety of the users (e.g.

by impact against obstacles or the pool wall).

Features shall not operate at full pressure immediately; they shall build up to their full pressure over a

period of time, sufficient for the users to become aware.
4.8 Additional requirements for specific leisure features
4.8.1 Stream channels and rivers
4.8.1.1 General

The speed of the water and the path of stream shall not compromise the safety of a user entering or

exiting the feature.

The feature shall be designed to avoid unintentional collisions, which can cause hazards for the users.

NOTE It is advised to consider the different body masses and buoyancy of users as they can affect the action

of any particular feature.

The average speed of the water in the cross section of the stream channel shall be ≤ 3,5 m/s.

The water depth in a stream channel shall be between 600 mm and 1 350 mm.

The need of supervision of a stream channel shall be considered by a risk assessment according to EN

15288-2.
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4.8.1.2 Other swimming pool components installed in a stream channel

To prevent risks of impact and/or entrapment caused by involuntary movement of the users, special

attention shall be paid to the location and type of swimming pool accessories installed in a stream

channel.
4.8.2 Waves
4.8.2.1 Wave chamber grille

If the waves are generated by wave producing chambers, grilles shall be fitted to segregate the

chambers from the pool. The grilles shall be constructed, except for the perimeter frame, only by

vertical bars.

Wave chamber grilles shall comply as a minimum with the head entrapment test according to

EN 13451-1.
4.8.2.2 Other swimming pool components installed in a wave pool

To prevent risks of impact and/or entrapment caused by involuntary movement of the users, special

attention shall be paid to the location and type of swimming pool accessories installed in a wave pool.

4.8.3 Water fall/water curtain

A water fall/water curtain shall not obscure any hazards (e.g. submerged steps, obstacles), when in

operation.

Features producing a curtain of water (e.g. waterfalls, rain sprays, mushroom fountains) shall ensure

proper ventilation behind the curtain.
4.8.4 Aerosol effects

The legionella hazard shall be considered when designing and operating any aerosol effect (e.g. coming

from sprays, water falls, water curtains).
4.8.5 Jet features above water level

The trajectory of the water jet, that is in reach of the users shall not cause any harm.

4.8.6 Rapids
Where a river effect is crea
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