# Gas Valve Specs When you are looking for a gas valve from scratch, you will need to have the below info before you can find a quote. 1. Coil voltage, AC or DC? 2. Pipe size? 3. Operating Pressure? 4. Media? Natural gas, Propane... 5. Always Open or Closed? 6. In door or out door? 2, 3 or 4 way?