Kevin try to get some numbers or model id's off the valve casting and google it-be sure what valve you have you can use with your system. You could also look at the valve photos on SC to possibly match up the vendor/valve series. When you do fire the system up again, you could lower the relief valve setting to prevent any startup disasters-the relief will open up before anything blows up and save you hassle and money of replacement parts..just a thought
Best of luck.
