1961 Viking Upright Sprinkler Head. Removed from service because it was painted. Cleaning paint off a sprinkler head is not permitted.
Central Special Application K17-231 Head Manufactured in 1997. 200°F Model 804A
This is a special application sprinkler head. By the GREEN bulb, it is rated at 200°F. It is a k=17 (16.8) sprinkler head to be positioned in the upright position. The thread is 3/4 inch NPT. The pintle on the top of the deflector identifies that the sprinkler head is not a conventional head. Any sprinkler head with a pintle requires a closer look because it is not a standard sprinkler head.