My furnace and water heater tee off the same 3/4” gas pipe but there’s a 3rd flexible gas line coming from the junction of my main gas line where it goes from a slightly thicker pipe and reduces to the 3/4” feeding into the branch of the gas line going to the water heater. Does my water heater need the extra gas line feed to accommodate gas demand when both appliances are running or can I eliminate the secondary flexible line to the water heater...
Originally asked by Dan on Stack Exchange (diy) (CC BY-SA 4.0).
