If you have difficulty in submitting comments on draft standards you can use a commenting template and email it to admin.start@bsigroup.com. The commenting template can be found here.

We use cookies to give you the best experience and to help improve our website

Find out what cookies we use and how to disable them

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

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 (2)
Reference Standards description
Status ?

The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS EN 1508:2025 Water supply. Requirements for systems and components for the storage of water

Categories: Water. Drinking | External water conveyance systems

Approval begins : 		Approval
BS EN 1508 Water supply - Requirements for systems and components for the storage of water

Categories: Unclassified documents

Proposal begins : 		Proposal
Published (1)
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
Withdrawn (1)
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Withdrawn begins : 2025-04-28 		Withdrawn