SIST EN 13451-3:2011+A2:2014
(Main)Swimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features
Swimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features
EN 13451-3:2011+A2 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 13451-1:2011. The requirements of this specific standard take priority over those in EN 13451-1:2011. This part of EN 13451 is applicable to swimming pool equipment 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.
Schwimmbadgeräte - Teil 3: Zusätzliche besondere sicherheitstechnische Anforderungen und Prüfverfahren für Ein- und Ausläufe sowie Wasser-Luftattraktionen
Diese Europäische Norm legt zusätzlich zu den allgemeinen sicherheitstechnischen Anforderungen nach EN 13451-1:2011 sicherheitstechnische Anforderungen und Prüfverfahren für Einläufe 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 13451-1:2011.
Dieser Teil der EN 13451 gilt für Schwimmbadgeräte, hergestellt 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 propres aux pièces d'aspiration et de refoulement et aux équipements de loisirs aquatiques disposant d'introduction et d’extraction d'eau/d’air
La présente Norme spécifie les exigences de sécurité et les méthodes d'essai applicables aux pièces d'aspiration et de refoulement d’eau/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 relatives à la sécurité de l’EN 13451-1:2011.
Les exigences présentées dans cette norme spécifique ont la priorité sur celles de l’EN 13451-1:2011.
La présente partie de l’EN 13451 est applicable aux équipements de piscine 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
Standard EN 13451-3:2011+A2 določa varnostne zahteve ter preskusne metode za odprtine za dovod in odvajanje vode/zraka ter dejavnosti za prosti čas na podlagi vode/zraka, ki vključujejo premikanje vode, in je dodatek k splošnim varnostnim zahtevam v standardu EN 13451-1:2011. Zahteve tega specifičnega standarda imajo prednost pred zahtevami v standardu EN 13451-1:2011. Ta del standarda EN 13451 se uporablja za opremo za plavalne bazene, zasnovano za: – dovod in odvajanje vode pri dejavnostih za nego telesa in prosti čas; – dovod zraka pri dejavnostih za prosti čas; – vodne dejavnosti za prosti čas, ki vključujejo premikanje vode.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Oprema za plavalne bazene - 3. del: Dodatne posebne varnostne zahteve in preskusne metode za bazenski pribor za pripravo vodeSchwimmbadgeräte - Teil 3: Zusätzliche besondere sicherheitstechnische Anforderungen und Prüfverfahren für Ein- und Ausläufe sowie Wasser-LuftattraktionenÉquipement de piscine - Partie 3: Exigences de sécurité et méthodes d'essai complémentaires propres aux pièces d'aspiration et de refoulement et aux équipements de loisirs aquatiques disposant d'introduction et d’extraction d'eau/d’airSwimming pool equipment - Part 3: Additional specific safety requirements and test methods for inlets and outlets and water/air based water leisure features97.220.10Športni objektiSports facilitiesICS:Ta slovenski standard je istoveten z:EN 13451-3:2011+A2:2014SIST EN 13451-3:2011+A2:2014en,fr,de01-oktober-2014SIST EN 13451-3:2011+A2:2014SLOVENSKI
STANDARDSIST EN 13451-3:2011+A1:20131DGRPHãþD
SIST EN 13451-3:2011+A2:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13451-3:2011+A2
May 2014 ICS 97.220.10 Supersedes EN 13451-3:2011+A1:2013
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
Équipement de piscine - Partie 3: Exigences de sécurité et méthodes d'essai complémentaires propres aux pièces d'aspiration et de refoulement et aux équipements de loisirs aquatiques disposant d'introduction et d'extraction d'eau/d'air
Schwimmbadgeräte - Teil 3: Zusätzliche besondere sicherheitstechnische Anforderungen und Prüfverfahren für Ein- und Ausläufe sowie Wasser-Luftattraktionen This European Standard was approved by CEN on 29 July 2011 and includes Amendment 1 approved by CEN on 14 June 2013 and Amendment 2 approved by CEN on 6 March 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13451-3:2011+A2:2014 E SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 2 Contents Page Foreword .3 1 Scope .5 2 Normative references .5 3 Terms and definitions .5 4 Safety requirements .7 4.1 General .7 4.2 Structural integrity .7 4.3 Water speed at inlets .9 4.4 Hair entrapment .9 4.5 Slip resistance of grilles .9 4.6 Risk of suction entrapment .9 4.7 Positioning of leisure features . 12 4.8 Stream channels and rivers . 12 4.9 Additional requirements for specific leisure features . 13 5 Test methods . 15 5.1 General . 15 5.2 Structural integrity . 15 5.3 Hair entrapment test . 18 6 Documentation . 21 Annex A (informative)
Obstruction test for floor outlets suction grills . 23 A.1 General . 23 A.2 Test device . 23 A.3 Water flow . 25 A.4 Procedure . 25 A.5 Evaluation . 26 Annex B (informative)
Water speed . 27 B.1 General . 27 B.2 Calculation methods . 27 B.3 Test Methods . 27 B.4 Design stage . 28 B.5 Suction points in operation . 29 Annex C (normative)
Entrapment of hair in slits . 30 C.1 Testing equipment . 30 C.2 Test method . 30 C.3 Evaluation . 30 Bibliography . 31
SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 3 Foreword This document (EN 13451-3:2011+A2:2014) 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 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 November 2014, and conflicting national standards shall be withdrawn at the latest by November 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2013-06-14 and Amendment 2, approved by CEN on 2014-03-06. This document supersedes #EN 13451-3:2011+A1:2013$. The start and finish of text introduced or altered by amendment is indicated in the text by tags
!" and #$. The European Standard EN 13451 Swimming pool equipment consists of: — Part 1: General safety requirements and test methods; — 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. In relation to EN 13451-3:2001 and EN 13451-8:2001, the following main amendments have been made: a) requirements of EN 13451-8:2001 were incorporated; b) requirements of the hair entrapment tests were changed; c) test methods have been widened and improved. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 4 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 5 1 Scope This European Standard 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 13451-1:2011. The requirements of this specific standard take priority over those in EN 13451-1:2011. This part of EN 13451 is applicable to swimming pool equipment 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, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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, Swimming pool equipment - Part 1: General safety requirements and test methods EN 15288-1, Swimming pools — Part 1: Safety requirements for design 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 13451-1:2011 and the following apply. 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 3.4 sump vessel between the suction outlet grille and the suction outlet piping, manufactured or field built SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 6 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 could 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 could 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 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 formed as a result of air, being emitted into swimming pool water EXAMPLE Geysers, bubble seats. 3.14 air and water operated leisure feature feature 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 SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 7 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 pumps 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 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 15288-1 and EN 15288-2, including consideration of their design, location, method of operation, warning signals and supervision. 4.2 Structural integrity 4.2.1 Floor inlets Floor inlets 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. 4.2.2 Wall inlets Wall inlets installed between water level and 800 mm depth shall be designed to withstand a load equivalent to 100 % of the load according to EN 13451-1:2011, A.2.2. Wall inlets installed > 800 mm below water level shall be designed to withstand a load equivalent to 10 % of the load according to EN 13451-1:2011, A.2.2. Wall inlets shall be tested for: — horizontal load and deformation, if applicable, according to 5.2.3; — point load according to 5.2.4; SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 8 — shear load, if applicable, according to 5.2.5. 4.2.3 Floor and wall water outlets Floor and wall water outlets shall be designed to withstand the load according to EN 13451-1:2011, A.2.2. 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, A.2.2 related to their shape (point, line or area load). Grilles shall be tested for vertical load and deformation, in accordance with 5.2.2. 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. 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 is placed in a walkable area, it shall be designed to withstand the load according to EN 13451-1:2011, 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. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 9 4.2.7 Overflow channels When the overflow channel is designed to be covered by a grille, its supporting structure 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 < q00 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 B. 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, Table 1. 4.6 Risk of suction entrapment 4.6.1 General Suction devices 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. #Additionally at least one of the either a), b) or c) shall be met: a) multiple suction outlet system designed in such a way that:$ 1) a minimum of two functioning suction outlets per pump are installed; 2) the distance between the nearest points of the perimeters of the devices is ≥ 2 m; 3) if any one of the suction outlets becomes blocked, the flow through the remaining suction outlet/s shall accommodate 100 % of the flow rate. b) #in case of suction outlet systems with only one grille, the grille shall be designed in such a way that either$ 1) one user can not cover more than 50 % of the opening; #or$ 2) raised grilles domed opposite to the flow direction, with prevalent peripheric suction. The height of the dome shall be at least 10 % of the main dimension. Obstruction test are available (for an example see Annex A); #or$ SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 10 3) single grilles with a surface of the area circumscribed to the suction openings ≥ 1 m² (see Figure 1).
Figure 1 — Identification of the area circumscribed to the suction openings c) a gravity feed tank. NOTE 1 Frequency of testing should be determined 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 b), or; — one or more additional suction outlets shall be provided as in a) !." !deleted text" In addition to the requirements in a) to c), a vacuum release system may be provided. Vacuum release systems typically respond to a blockage of a single outlet by: — releasing the vacuum by turning the pump off; — drawing water out of a vent tube to allow air into the suction system; — mechanically operating valves to reverse flow through the suction outlet(s); — opening a valve to atmosphere to cause a pump to lose prime. All vacuum release systems shall be tested on outlets which meet the structural integrity and design requirements for grilles given earlier in this standard. NOTE 2 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 c) 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. NOTE 3 It is recommended to install at the deck an accessible general emergency switch for the pumps level. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 11 4.6.2 Sumps for floor and wall water outlets Manufactured or field built floor and wall water outlets shall have a sump with dimensions as shown in Figure 2.
Key a indicates suggested sump configuration D inside diameter of the pipe Dmin dimension ≥ D Figure 2 — Samples of sumps 4.6.3 Skimmers Skimmers shall be effectively vented to atmosphere through openings in the lid (see Figure 3), or through a separate vent pipe.
Key 1 vent trough lid Figure 3 — 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. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 12 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 15288-1. 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 (see 3.9) is ≤ 2 m/s (see 4.3); b) the total dynamic head in the system before the outlet is ≤ 30 kPa. For water speed test see Annex B. 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 Stream channels and rivers 4.8.1 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 The different body masses and buoyancy of users should be considered as they can affect the action of any particular feature. qhe 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 15288-1. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 13 4.8.2 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. If slits related to suction points are present, see Annex C. 4.9 Additional requirements for specific leisure features 4.9.1 Waves 4.9.1.1 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. 4.9.1.2 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. 4.9.2 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. 4.9.3 Aerosol effects The legionella hazard shall be considered when designing and operating any aerosol effect (e.g. coming from sprays, water falls, water curtains). 4.9.4 Cannon spray The trajectory of the water jet, from the outlet to the highest point, shall not be in reach of the users. If the operation of the cannon creates a forceful jet, a warning shall be given to make the users aware of the effect. 4.9.5 Rapids Where a river effect is created by an inclination, the relevant general safety requirements of EN 1069-1 shall be complied with. 4.9.6 Vortex pools 4.9.6.1 General Vortex pools shall have a water depth between 600 mm and 1 350 mm. The end of rapids into a vortex pool shall comply with EN 1069-1. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 14 4.9.6.2 Other swimming pool components installed in a vortex 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 vortex pool. 4.9.7 Fountains Fountains shall not be an obstruction hazard. Special attention shall be paid to interferences between the possible paths of the users in and around the pool and the design and position of the fountains. Wherever the risk of impact is foreseeable, the water effect shall not hide the fountain structure, or it shall be made obvious. #Fountains, installed in a pool or on the pool surround, shall prevent users passing under them unless there is a clearance of not less than 2 100 mm above any walking surface (see Figure 4). The possibility to reduce the 2 100 mm clearance for special areas, e.g. children pools, shall be subjected to a risk assessment.$ # Dimensions in millimetres
Figure 4 — Fountains — Vertical clearances$ 4.9.8 Special effects A risk assessment (according to EN 15288-1) shall be performed when additional effects of water leisure features, which can cause disorientation to the users, are foreseen. EXAMPLE Examples of such kind of special effects are: — darkness; — light effects (flash lights, projections, laser light, running lights, etc.); — sound effects; — fog. SIST EN 13451-3:2011+A2:2014
EN 13451-3:2011+A2:2014 (E) 15 5 Test methods 5.1 General Unless otherwise specified, the requirements of Clause 4 shall be verified by the most appropriate method: — measurement; — visual examination or — practical tests. If the equipment shall pass two or more tests, all tests shall be carried out on the same test group according to the following sequence: — load test; — impact test; — vacuum test. At the end of each test, a visual inspection shall be carried out before subjecting the specimen to the subsequent test. Load, impact and vacuum test shall be carried out in conditions equiva
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