EN ISO 9093:2021

Small craft - Seacocks and through-hull fittings (ISO 9093:2020)

This document specifies requirements for through-hull fittings, seacocks, hose connections, their fittings and their installation in small craft with a length of hull, LH, as defined in ISO 8666:2020, of up to 24 m.
This document is not applicable to engine and heater exhaust fittings, and sail drive through-hull fittings.

Kleine Wasserfahrzeuge - Seeventile und Außenhautdurchführungen (ISO 9093:2020)

Dieses Dokument legt Anforderungen an Außenhautdurchführungen, Seeventile, Schlauchverbindungen, Schlauchstutzen und deren Einbau in kleine Wasserfahrzeuge mit einer Rumpflänge LH bis 24 m, wie in ISO 8666:2020 definiert, fest.
Dieses Dokument ist nicht anzuwenden für Motor- und Heizungsabgasleitungen und Außenhautdurch-führungen für Segelbootantriebe.

Petits navires - Vannes de coque et passe-coques (ISO 9093:2020)

Le présent document spécifie les exigences relatives aux passe-coques, vannes de coque, raccords de tuyaux flexibles, leur connexion et leur installation sur les petits navires d'une longueur de coque LH, telle que définis dans l'ISO 8666:2020, inférieure ou égale à 24 m.
Ce document n'est pas applicable aux raccords d'échappement de moteur et de chauffage, ni aux passe-coque des embases de transmission «sail drive».

Mala plovila - Ventili in fitingi za morsko vodo v trupu plovila (ISO 9093:2020)

General Information

• Status: Published
• Publication Date: 26-Jan-2021
• Withdrawal Date: 30-Jul-2021
• ICS: 47.080 - Small craft
• Technical Committee: CEN/TC 464 - Small Craft
• Drafting Committee: CEN/SS T01 - Shipbuilding and maritime structures
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 27-Jan-2021
• Completion Date: 27-Jan-2021
• Directive: Not Harmonized2003/44/EC - Approximation of the laws, regulations and administrative provisions of the Member States relating to recreational craft
• Directive:

  ---

  Harmonized Standard2013/53/EU - Directive 2013/53/EU of the European Parliament and of the Council of 20 November 2013 on recreational craft and personal watercraft and repealing Directive 94/25/EC
  OJ Ref: L, L 303 OJ Date: 27-Aug-2021
• Mandate: M/542 - [C(2015)8736] Standardisation Request to the European Committee for Standardisation and the European Committee for Electro-technical Standardisation as regards recreational craft and personal watercraft in support of Directive 2013/53/EU of the European Parliament and of the Council of 20 November 2013 on recreational craft and personal watercraft and repealing Directive 94/25/EC.
• Ref Project: SIST EN ISO 9093:2021 - Small craft - Seacocks and through-hull fittings (ISO 9093:2020)

Relations

• Replaces: EN ISO 9093-2:2018 - Small craft - Seacocks and through-hull fittings - Part 2: Non-metallic (ISO 9093-2:2002)
• Effective Date: 08-Jun-2022
• Replaces: EN ISO 9093-1:2018 - Small craft - Seacocks and through-hull fittings - Part 1: Metallic (ISO 9093-1:1994)
• Effective Date: 03-Jan-2018
• Refers: ISO 4892-3:2016 - Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps
• Effective Date: 09-Feb-2026
• Refers: FprEN 14509-2 - Double skin metal faced insulating panels - Factory made products - Specifications - Part 2: Structural applications - Fixings and potential uses of stabilization of individual structural elements
• Effective Date: 28-Jan-2026
• Refers: EN 3475-513:2020 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 513: Deformation resistance (Installation with plastic cable ties)
• Effective Date: 28-Jan-2026
• Referred By: EN 16865:2016 - Inland navigation vessels - Connections and assembled hoses for the transfer of potable water
• Effective Date: 28-Jan-2026
• Consolidated By: ISO 9093:2020 - Small craft — Seacocks and through-hull fittings
• Effective Date: 12-Feb-2026

Overview

EN ISO 9093:2021 specifies requirements for seacocks, through-hull fittings, hose connections, related fittings, and their installation in small craft up to 24 meters in length, as defined in ISO 8666:2020. The standard is applicable to components used for transferring liquids or gases through the hulls of small boats and is essential for ensuring safety, watertight integrity, and durability in marine environments. It does not apply to engine, heater exhaust fittings, or sail drive through-hull fittings.

Established by CEN, this European and international standard is harmonized to support compliance with the EU Recreational Craft Directive (2013/53/EU). The document consolidates prior editions into a single comprehensive standard and introduces updated requirements for material performance, strength, and environmental resistance.

Key Topics

• Scope and Definitions

  • Applies to through-hull fittings, seacocks, and hose connections on small craft.
  • Excludes engine and heater exhaust, and sail drive fittings.

• Material Requirements

  • All fittings below the waterline must be corrosion-resistant.
  • Brass components must be dezincification-resistant (DZR).
  • Non-metallic parts require UV stabilization and resistance to oxidation.
  • Combinations of materials must consider galvanic corrosion risks.

• Design and Strength

  • Detailed requirements for thread identification, sizing, and flange dimensions.
  • Fittings must be watertight, securely attached, and able to withstand external forces.
  • Minimum wall thickness and threading ensure mechanical performance.
  • Seacocks must be operable throughout expected temperature ranges.

• Installation

  • Proper installation secures fittings and maintains hull integrity, especially in reinforced plastic hulls.
  • Seacocks must be accessible for inspection and operation.
  • Correct use of clamps, fasteners, and bedding compounds is required.

• Testing and Maintenance

  • Components are subject to strength, corrosion resistance, and UV resistance tests.
  • Owner’s manual should include fitting locations, operation, maintenance, and safety instructions.

Applications

EN ISO 9093:2021 is crucial for:

• Boat builders and manufacturers: Ensuring that seacocks and through-hull fittings meet technical and regulatory requirements for safety and durability.
• Marine equipment suppliers: Guaranteeing conformity for fittings sold for use in small craft.
• Boat owners and operators: Understanding the maintenance and operational requirements for safe use.
• Surveyors and inspectors: Assessing compliance during construction and periodic inspections.

Typical applications include:

• Installing or replacing seacocks or drainage fittings in yachts, motorboats, and recreational watercraft.
• Providing specifications for new builds or refits to ensure water ingress prevention.
• Ensuring continued safe operation with regular inspections and adherence to maintenance guidelines.

Related Standards

• ISO 8666:2020 – Defines principal data, including hull length for small craft applicability.
• ISO 12215-6:2008 – Covers structural arrangements and details for hull construction.
• ISO 4892-3:2016 – Methods for UV exposure testing of plastics.
• ISO 6509-1:2014 & ISO 6509-2:2017 – Determination and assessment of dezincification resistance in copper alloys.
• ISO 14993:2018 – Corrosion resistance testing for metals and alloys in salt mist conditions.

By adhering to EN ISO 9093:2021, stakeholders ensure compliance with EU regulations, improve craft safety, and enhance product reliability and customer confidence in marine installations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2021
Nadomešča:
SIST EN ISO 9093-1:2000
SIST EN ISO 9093-1:2018
SIST EN ISO 9093-2:2003
SIST EN ISO 9093-2:2018
Mala plovila - Ventili in fitingi za morsko vodo v trupu plovila (ISO 9093:2020)
Small craft - Seacocks and through-hull fittings (ISO 9093:2020)
Kleine Wasserfahrzeuge - Seeventile und Außenhautdurchführungen (ISO 9093:2020)
Petits navires - Vannes de coque et passe-coques (ISO 9093:2020)
Ta slovenski standard je istoveten z: EN ISO 9093:2021
ICS:
47.020.30 Sistemi cevi Piping systems
47.080 Čolni Small craft
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9093
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2021
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 9093-1:1997, EN ISO 9093-1:2018,
EN ISO 9093-2:2002, EN ISO 9093-2:2018
English Version
Small craft - Seacocks and through-hull fittings (ISO
9093:2020)
Petits navires - Vannes de coque et passe-coques (ISO Kleine Wasserfahrzeuge - Seeventile und
9093:2020) Außenhautdurchführungen (ISO 9093:2020)
This European Standard was approved by CEN on 29 November 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9093:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered . 4

European foreword
This document (EN ISO 9093:2021) has been prepared by Technical Committee ISO/TC 188 "Small
craft" in collaboration with Technical Committee CEN/TC 464 “Small Craft” the secretariat of which is
held by SIS.
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 July 2021, and conflicting national standards shall be
withdrawn at the latest by July 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 9093-1:1997, EN ISO 9093-2:2002, EN ISO 9093-1:2018 and
EN ISO 9093-2:2018.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this
document.
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, 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 the
United Kingdom.
Endorsement notice
The text of ISO 9093:2020 has been approved by CEN as EN ISO 9093:2021 without any modification.

Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered
This European Standard has been prepared under a Commission’s standardization request
M/542/C(2015) 8736 final to provide one voluntary means of conforming to essential requirements of
Directive 2013/53/EU.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and
Annex I of Directive 2013/53/EU
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2013/53/EU of this EN
Annex I, Clause 2.5, Owner’s In respect of information to be
Clause 11
manual included in the Owner’s Manual
This standard do not address
windows, portlights, doors and
Annex I, Clause 3.4, Openings in
Clause 3, 4, 5, 6, 7, 9 hatch covers and point loads
hull, deck and superstructure
applied by the weight of persons
on the deck.
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 9093
First edition
2020-12
Small craft — Seacocks and through-
hull fittings
Petits navires — Vannes de coque et passe-coques
Reference number
ISO 9093:2020(E)
©
ISO 2020
ISO 9093:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
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Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 9093:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material requirements . 2
4.1 General . 2
4.2 Material combinations . 2
4.3 Resistance to deterioration/corrosion tests . 2
4.4 Strength requirements . 3
4.5 Range of operating temperatures . 3
4.5.1 General operating requirements . 3
4.5.2 Storage temperature requirement . 3
4.5.3 High temperature operating test . 3
4.5.4 Low temperature operating test . 3
5 Through-hull fittings . 3
5.1 Thread identification . 3
5.2 General design requirements . 4
5.3 Detailed design requirements . . 4
5.3.1 Stem . 4
5.3.2 Flange diameter . 5
5.3.3 Finish. 5
6 Seacocks — Design requirements . 5
6.1 General . 5
6.2 Thread length requirements . 5
7 Hose fittings . 6
7.1 Design requirements . 6
7.2 Hose connection. 6
8 Water scoops and outboard water strainers . 7
9 Installation . 7
9.1 Hull reinforcements . 7
9.2 Installation requirements . 7
10 Device installation information . 8
11 Owner's manual . 8
Annex A (normative) Strength test . 9
Annex B (normative) Corrosion resistance test .10
Annex C (normative) UV stabilisation test .11
Bibliography .12
ISO 9093:2020(E)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
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This document was prepared by Technical Committee ISO/TC 188, Small craft, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 464, Small craft, in
accordance with the Agreement on technical cooperation bet
...