Matching Pairs Sprinklers & SystemsOnline version matching by Jeannie Carter-Siddle 1 Sprinkler Head 2 Hood Filter 3 Corner Pulley 4 Fusible Link 5 Gas Valve 6 Actuation Cartridge 7 Sprinkler Gauge 8 Escutcheons 9 Sprinkler Cage 10 Black Pipe