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manifold pressure at grill

Joseph_4 Member Posts: 255
I live in NYC. I had a customer ask me to install a popular name brand natural gas grill. On the grill it says it should be 4.5" water column. The set up is as follows: a 1/2 gas cock connects to a quick connect hose which has a flare hose end going into the manifold. now in a gas valve on a boiler, i understand that the valve has a built in regulator to regulate down the 1/2 psi or (14" W.c) down to 3.5 " water column. On the grill, I don't see a regulator so isn't being fed gas at 1/2 psi which is much higher than 4.5 W.C?




  • Tim McElwain
    Tim McElwain Member Posts: 4,524
    What is your

    inlet gas pressure? If it is natural gas it should be around 6"W.C. out of the house regulator. If it is a low pressure gas area it can be between 6" W.C. to 10" W.C. 

    How may burners does the unit have? What is the required input?

    Connect a manometer onto one of the orifices on one of the burners if it is a multiple burner unit and see what you have for pressure with the other burners running. 
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