External water conveyance systems

Committee: NSAI/TC 11 (Wastewater Engineering Standards Committee)
Origin: NSAI
Close date: 19 Jul 2019
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This National Annex provides additional information on:

a) the basic and detailed calculation methods for determining the working storage capacity required when installing a rainwater harvesting system for non-potable use;

b) the appropriate 'dry period' to be used when performing the calculation; and

c) the definitions, parameters and terminology used in Annex A of I.S. EN 16941-1:2018;