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BS EN 16941-1:2024

BS EN 16941-1:2024

$167.15

On-site non-potable water systems – Systems for the use of rainwater

Published By Publication Date Number of Pages
BSI 2024 52
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This document specifies the requirements and gives recommendations for the design, sizing, installation, identification, commissioning and maintenance of rainwater harvesting systems for the use of rainwater on-site as non-potable water. This document also specifies the minimum requirements for these systems. Excluded from the scope of this document are – the use as drinking water and for food preparation, – the use for personal hygiene purposes, – attenuation and – infiltration. NOTE Conformity with the document does not exempt from compliance with the obligations arising from local or national regulations.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
10 4 Functional elements of rainwater harvesting systems
5 Design
5.1 Collection
5.1.1 General
11 5.1.2 Collection surfaces
5.1.2.1 Qualitative aspects
5.1.2.2 Quantitative aspects
5.1.3 Collection piping system
12 5.2 Treatment
5.2.1 General
5.2.2 Preliminary treatment
5.2.3 Treatment in storage device
13 5.2.4 Additional treatment
5.3 Storage
5.3.1 General
5.3.2 Materials
5.3.3 Dimensions
5.3.4 Capacity
5.3.5 Structural behaviour
14 5.3.6 Watertightness
5.3.7 Connections and internal pipe system
5.3.8 Access
5.3.9 Overflow
15 5.4 Back-up water supply
5.4.1 General
5.4.2 Backflow protection device
18 5.5 Pumping
5.5.1 General
5.5.2 Submerged pump
19 5.5.3 Non-submerged pump
5.5.4 Expansion vessel
5.5.5 Pump control unit
20 5.6 System control with monitoring
5.7 Metering
5.8 Distribution
21 5.9 Risk assessment
6 Sizing
6.1 Storage device
6.1.1 General
22 6.1.2 Determination of the available volume of rainwater
23 6.1.3 Determination of the non-potable water demand
24 6.1.4 Calculation methods
6.2 Back-up water supply
25 7 Installation
26 8 Differentiation and identification
9 Commissioning
27 10 Quality of non-potable water
11 Maintenance
28 Annex A (informative)Examples of calculation methods for storage capacity
A.1 General
A.2 Examples of calculation methods
A.2.1 Basic approach with annual time step
29 A.2.2 Detailed approach
A.2.2.1 General
30 A.2.2.2 Input data
A.2.2.3 Simulation principle
31 A.2.2.4 Application of results
33 Annex B (informative)Examples of rainwater harvesting systems with different back-up supply arrangements
36 Annex C (informative)Example for a commissioning sheet
38 Annex D (informative)Example of dye testing for distribution pipework cross-connections
39 Annex E (informative)Inspection and maintenance
E.1 Inspection and maintenance instruction sheet
40 E.2 Logbook

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BS EN 16941-1:2024
$167.15