British Standards Institution

Sector: Construction

Categories: Water. Drinking | External water conveyance systems | Pipelines. General | Water supply | Water quality. General

Overview: Under the direction of B/504 is responsible for the development and maintenance of standards for systems and components relating to external mains water supply. Provides the UK input to CEN/TC 164/WG 1.

Committee standards activity

In Progress (1)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS EN 1508	Water supply - Requirements for systems and components for the storage of water Categories: Unclassified documents Proposal begins :	Proposal

Published (2)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS EN 805:2025	Water supply. Requirements for systems and components outside buildings Categories: Water quality. General \| Pipelines. General \| Water supply \| External water conveyance systems Published standard begins : 2025-04-28	Published standard
BS EN 1508:2025	Water supply. Requirements for systems and components for the storage of water Categories: Water. Drinking \| Water supply Published standard begins : 2025-10-14	Published standard

Withdrawn (1)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS EN 805:2000	Water supply. Requirements for systems and components outside buildings Categories: Water quality. General \| Pipelines. General \| Water supply Withdrawn begins : 2025-04-28	Withdrawn

Standards Development

B/504/-/1 - Water Supply - External systems and components

Committee standards activity