Specifications: Response: Standard/Quick Coverage: Water discharge is directed primarily outward and downward in a quarter spherical pattern, a portion of the spray is also directed towards the back wall. Installation: Designed for installation along a wall or the side of a beam just beneath a smooth ceiling. Installed 4 to 12 in. Below ceiling. (ref. Nfpa 13) Orifice size:1/2" Thread size: NPT1/2" Temp. Rating:57,68,79,93 degrees centigrade. Maximum service pressure:175 psig/1.2mpa(12 bar) Listing and approvals: UL/CUL Listed