Viking Standard Response/Quick Response Extended Coverage Dry Concealed Pendent Sprinklers are thermosensitive spray sprinklers suitable for use in areas subject to freezing. The sprinklers are designed for dry systems and preaction systems where it is necessary to prevent water or condensation from entering the drop nipple before sprinkler operation. They may also be installed in spaces subject to freezing and supplied from a wet system in an adjacent heated area.  The dry concealed sprinkler is pre-assembled with a threaded adapter for installation with the domed cover that provides up to ½” (12.7 mm) of vertical adjustment.  The push-on, thread-off cover slips on from below the ceiling to allow installation of the sprinkler prior to ceiling construction.  Viking Standard Response Dry Concealed Pendent Sprinklers are available in various finishes and temperature ratings to meet design requirements. The Electroless Nickel Teflon (ENT) finish has been investigated for installation in corrosive atmospheres and is cULus Listed as corrosion resistant as indicated in the Approval Chart. The ENT finish is only available for the sprinkler assembly; the cover plate is not plated.  Refer to the technical data sheet for design and installation requirements.