Series RFII Quick Response Concealed Pendent Sprinkler (TY3531) is a decorative sprinkler designed for installation on concealed pipe systems where the appearance of a smooth ceiling is required. The sprinkler is hidden from view by a low profile cover plate installed flush with the ceiling.The cover plate detaches during fire conditions when the temperature around the sprinkler approaches its operating temperature. Also available is the 'Air&Dust Seal' which can be fitted to the cover plate and is designed for use in sensitive areas to prevent the travel of air and dust from the ceiling area above the cover plate. See Technical Datasheet for further information