Oct 01,2019·Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets La presente Variante raggruppa le modifiche alla Norma EN 61770:1999-12 derivanti dagli Amendment A1 (EN 61770/A1:2004-07) e A2 (EN 61770/A2:2006-06) e dal Corrigendum CENELEC di agosto 2007 che haCSA - B356-10 - Water pressure reducing valves for Aug 01,2010·Document History.B356-10.August 1,2010.Water pressure reducing valves for domestic water supply systems.This Standard applies to self-acting spring-operated devices that automatically reduce the initial pressure in water systems to a
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