Aug 122013

Your Grills performance is greatly affected by the amount of gas Volume you feed it. The larger the pipe, the more you can feed your grill, which will yield maximum performance. There are many Gas Line related factors that will affect your grills performance.

For most gas BBQ grills, the test is to lift out your grates, covers and physically look at the burners themselves with all of them turned on high. A properly “gas-fed” grill will have about 1 1/2″ high flame with the burners turned on high.  If your gas line is “underfed”, you may get one burner to give you a 1 1/2″ flame. Your performance will be negatively affected if you have a flame smaller than 1 – 1/2″. Your valves might even whistle when they are all on. This is an indication of insufficient gas line sizes, causing a restriction in volume. 

Is there a basic gas pressure measurement?

  1. Yes, it is called “Water Column Inches” which is a scientific way of measuring the volume and pressure of gas running through a pipe. 
  2. Propane should measure around eleven (11) Water Column Inches (The Gas Co. may come out and give you a free reading).
  3. Natural Gas measures a minimum of eight (8) Water Column Inches.

Are other factors that greatly affect my grills performance?


  1. The Length of the gas pipe run or line from the source, your house, or gas meter to the grill.  The optimal feed pipe size is a minimum of  3/4″ and One Inch (1″) in diamater is the best size.  Try and reduce the pipe size as close to the grill as possible and use no less than 3/8″ closest to your grill.
  2. You will experience lower grilling performance if your household gas is being shared with a small pipe which will affect your grill when other gas appliances, fireplace, heaters, kitchen stoves, etc are turned on during your grilling times.
  3. Make sure that the flex hose to your grill, NO less than 3/8″.

Looking to Convert your grills Gas, read this first