automatic sprinkler 1. ISO and CCC certified 2. 1/2",3/4" 3. Brass, chrome plating 4. Quick delivery automatic sprinklerdifferent type: pendant type, upright type, ordinary type, sidewall horizontal type. Concealed typespecification:(1) rated working pressure: 12 bars(1.2Mpa)(2) airproof test pressure: 24bars(2.4Mpa)(3) strength test pressure: 30bars(3Mpa)(4) thread: 1/2”,3/4”(5) flux coefficient ...