Viking® VK638-D, Corridor Sprinkler, 8.0K, Extended Coverage, Domed Concealed Sidewall, QR, 3/4" NPT, Brass, 200 Degree 17375AEX Fire Sprinkler Head 53-111-9-280 Item: RASCO/Reliable® RA3533

Item: RASCO/Reliable® RA3533

57-393-9-155

the SSM series mount to a standard four-inch square electrical box

49-740-1-175

51-790-1-200

Viking® VK638-D, Corridor Sprinkler, 8.0K, Extended Coverage, Domed Concealed Sidewall, QR, 3/4" NPT, Brass, 200 Degree 17375AEX Fire Sprinkler Head 53-111-9-280 Item: RASCO/Reliable® RA3533Viking VK638 D, Corridor Sprinkler, 8. 0K, Extended Coverage, Domed Concealed Sidewall, QR, 3 4" NPT, Brass, 200 Degree 17375AEX Fire Sprinkler Head Viking Quick Response Extended Coverage Concealed Horizontal Sidewall Sprinkler VK638 is a thermosensitive spray sprinkler pre assembled with a threaded adapter for installation with a domed cover. The glass bulb operating element and special deflector characteristics meet the challenges of quick response