|Fluid Category 3 - Size||DN20|
|Fluid Category 3 - Powered||No|
|Fluid Category 3 - Test Points||Non-Verifiable|
Backflow prevention for fluids in categories 1 - 3 (refer to Scheduled 1 of Water Regulations July 1999) Supply to flats and apartments - refer to Branch Valve Domestic Washbasins, Baths and Showers - refer to ED235 Domestic Clothes and Dishwashing machines (houses only) CWF Primary and Heating circuits (houses only with removable quick fill loop) - see Filling Valve with CA device Hose Union taps (houses only - check valves in taps illegal)
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Every Double Check Valve assembly shall have a DZR brass body with female BSP connections – model ED440 as distributed by Arrow Valves Ltd - Tel 01442 823123 www.arrowvalves.co.uk. The pressure drop across the assembly at 1.5 m/s pipe velocity shall be less than 3.5 m. The body shall be DZR brass.