ISO 17775:2006

Aircraft - Ground-service connections - Potable water, toilet-flush water and toilet drain

ISO 17775:2006 specifies the detail dimensions of the male connector interfaces, fitted to an aircraft, used for servicing of the potable water systems, the toilet-flush water systems, and the toilet drain systems currently in common use. ISO 17775:2006 is applicable to all commercial aircraft with water and toilet systems and is recommended for military and private aircraft that use water and toilet systems. ISO 17775:2006 does not include requirements for the ground half (female) couplings or protective caps, but provides sufficient interface details for such items to be designed. It does not include any specified dimensions for the clearance required around the connector on the aircraft body itself for either any protective caps or ground half couplings, although general recommendations are made.

Aéronefs — Raccords de service au sol — Eau potable, rinçage et vidange des toilettes

General Information

• Status: Published
• Publication Date: 27-Nov-2006
• ICS: 49.080 - Aerospace fluid systems and components
• ICS: 49.100 - Ground service and maintenance equipment
• Technical Committee: ISO/TC 20/SC 9 - Air cargo and ground equipment
• Drafting Committee: ISO/TC 20/SC 9 - Air cargo and ground equipment
• Current Stage: 9093 - International Standard confirmed
• Start Date: 05-Jun-2023
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 450:1976 - Aircraft - Connection for water of drinkable quality
• Effective Date: 15-Apr-2008
• Revises: ISO/R 47:1957 - Withdrawal of ISO/R 47-1957
• Effective Date: 15-Apr-2008

Overview

ISO 17775:2006 is an international standard published by the International Organization for Standardization (ISO) that defines the detailed dimensions of male connector interfaces installed on aircraft. These connectors are specifically used for ground servicing of potable water systems, toilet-flush water systems, and toilet drain systems. The standard applies primarily to all commercial aircraft equipped with water and toilet systems and is also recommended for military and private aircraft using similar systems. ISO 17775:2006 ensures compatibility and interchangeability of these connectors worldwide.

Key Topics

• Connector Interface Dimensions: The standard specifies precise dimensions and tolerances for the male connectors fitted on aircraft to guarantee uniformity across manufacturers and operators. Detailed measurements include diameters, lengths, radii, and angular specifications for potable water, toilet-flush water, and toilet drain systems.
• Material Requirements: While the standard does not mandate specific materials, it emphasizes the use of corrosion-resistant steel compatible with aircraft water and toilet chemicals. Connectors must also meet strength and hardness criteria appropriate for operational demands.
• Compatibility and Interchangeability: ISO 17775:2006 addresses the historic variations among connectors derived from different suppliers, standardizing the interface to minimize adverse effects on performance during mating with ground-service equipment.
• Scope Exclusions: The standard covers only the male aircraft-side connectors, providing sufficient interface details for designing ground half (female) couplings and protective caps, but does not specify their dimensions. It also does not detail clearance requirements for connectors and protective caps around the aircraft body but offers general recommendations.
• Normative References: The document incorporates established ISO standards on technical drawing principles (ISO 129-1), geometrical product specifications (ISO 1101 and ISO 1302) to ensure dimensional accuracy and surface quality.

Applications

ISO 17775:2006 plays a vital role in various aviation and aerospace operations:

• Aircraft Ground Servicing: Facilitates seamless and safe servicing of potable water and waste systems by ensuring ground service connectors reliably mate with aircraft fittings.
• Aircraft Maintenance and Design: Serves as a guideline for aircraft manufacturers and maintenance crews to produce and inspect connector interfaces compliant with global standards.
• Interoperability among Equipment Suppliers: Enables manufacturers of ground-service equipment worldwide to design compatible couplings and protective caps, enhancing operational efficiency at airports and service facilities.
• Military and Private Aviation: Though designed mainly for commercial aircraft, the standard’s recommendations are valuable for military and private aircraft employing similar water and toilet systems.

Related Standards

• ISO 129-1: Technical drawings - Indication of dimensions and tolerances - General principles, ensuring precise interpretation of connector dimensions.
• ISO 1101: Geometrical Product Specifications (GPS) - Geometrical tolerancing, covering tolerances of form, orientation, location, and run-out crucial for connector assembly quality.
• ISO 1302: GPS - Surface texture indication, supporting consistent surface finish standards important for durable and reliable connectors.

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Keywords: ISO 17775:2006, aircraft ground-service connections, potable water connectors, toilet-flush water systems, aircraft toilet drain, aviation standards, connector interface dimensions, aircraft water systems, aerospace fluid systems, corrosion-resistant connectors, aircraft maintenance standards, ground-service equipment compatibility.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17775
First edition
2006-12-01
Aircraft — Ground-service connections —
Potable water, toilet-flush water and toilet
drain
Aéronefs — Raccords de service au sol — Eau potable, rinçage et
vidange des toilettes
Reference number
©
ISO 2006
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©  ISO 2006
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ii © ISO 2006 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 17775 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 10, Aerospace fluid systems and components.
ISO 17775 revises ISO/R 47:1957 and ISO 450:1976, cancelled in 1983 and 1998, respectively:
⎯ ISO/R 47:1957, Aircraft toilet flushing and drawing connections
⎯ ISO 450:1976, Aircraft — Connection for water of drinkable quality
Introduction
The ground-service interfaces and the mating ground connectors used on most commercial aircraft, as well as
on some military and private aircraft, are generally considered interchangeable since the designs used are all
based on the same original design. This was originally provided by the Roylyn Company in the 1950s and
then later used as the basis for other suppliers without the detail dimensions. As a result, there are minor
variations in some current products that may have some adverse affects on their performance when mated
with parts made by others. This International Standard provides the necessary detail dimensions to ensure
that all interface dimensions will be compatible, especially as new suppliers enter the market around the
world.
iv © ISO 2006 – All rights reserved

INTERNATIONAL STANDARD ISO 17775:2006(E)

Aircraft — Ground-service connections — Potable water,
toilet-flush water and toilet drain
1 Scope
This International Standa
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