The Singapore fire hose assembly that is used by SCDF comprises of a pair of instantaneous male and female Couplings made to British Standard 336 (BS 336 : 2010) binded to a type 3 red fire hose made in accordance to British Standard 6391 (BS 6391 : 2009). The aluminium version is commonly used for fresh water applications while the brass version is used for marine or salt water environment. For quick release, the “ears” of the female coupling are pulled.

Also known as: BS Coupling, BS 336 Coupling, British Standard Coupling, Instantaneous Coupling .