BS EN 1286:1999
BS EN 12163:2016
BS EN 12164:2016
BS 6920-3:2000
BS 6920-2.6:2000+A2:2014
AS/NZS 4020:2005
AS/NZS 4020:2005: App. I CI. 6.3
BS 6920-3:2000
BS 6920-2.6:2000+A2:2014
用水效益標籤計畫
HKHA Specification PLU2.M510
The Voluntary WELS on Water Tap
BS EN 1286:1999
BS 5412:1996
BS 5779:1979