I have a pressure regulator which has failed. I went to Home Depot to get a replacement, but none of the regulators they had were a match. They had different threads. Also, the regulator I have is sealed with O-rings on both the pipe and regulator which are located in face glands on mating surfaces on both the pipe and regulator. Does anyone know the make and model of this regulator so I can get a replacement? A photo is attached.