What is the gas pressure for Natural Gas?

[techjoeb]

For most NAT gas units for APW it should be 3.5-5 inches of water column. Most of these specs are on the data plate or in the installation manuals. I hope this helps! 

[wmontg5988]

Typically Natural gas pressure is between 6 and 7 inches WC (water Column) some equipment will be lower or higher depending on consumption design. Of course a model plate on the equipment or data plate on the gas valve will list the proper WC. Some ovens or furnaces may be 3.5″WC and tankless water heaters can be as high as 11″WC. Be sure to check pressures on both sides of the regulator and/or gas valve to ensure the both are able to keep up with demand.

[justrefr]

Your actual gas pressure will be approx. 2.5psi, the water colum pressure is 5 in w/c. pressures for all appliances are denoted in w/c and not psi. This can be adjusted at the gas valve of the appliance with a w/c guage connected to the manifold access tap. Hope this helps

[ectofix]

I’m sorry, but…WHERE does 2.5 psi come from?  It is NOT 5″ WC.  Maybe that was a typo?  2.5 psi is over 69″ WC and way higher than any gas pressure we work with for cooking equipment.

 

Alright, this is some pretty basic stuff, but I’ll throw it up here for clarification for anyone needing it:

 

ONE pound per square inch of pressure is equal to 27.68 inches of water column.  The picture below rounds that up to 27.75″ WC since it’s easier to remember:

 

techjoeb and wmontg5988 are correct in their statements regarding how to determine your correct gas pressures.

 

 

CREDIT to PartsTOWN for the outstanding photos they provide in their PartSPIN feature.  I did some graphical editing to them to create my photos above.

[rbnkitchenworld]

hi, let’s not forget about and might want to consider elevation referencing to sea level…

[mr-d]

Gas pressure at different altitudes does not change, orifice sizing compensate for that.

[ares]

2.5 psi? Huh? Run