These are threaded water shields designed to create a pendent intermediate level sprinkler when installed on an approved sprinkler. (3-1/4″ [83mm] diameter) water shields are threaded onto 1/2″ sprinkler inlet threads prior to installation.
Model E1 or E2
83mm Diameter Water Shield
Screw on type: Available in 1/2″(15mm) & 3/4″(20mm) Sprinkler to be used without a guard