Lsu4life47
Ok, so I am in the process of working on a new install. I haven't got my generator yet. That is the next thing. I just paid the gas company to come put me a meter riser in. I will be running 1.25 in pipe from meter to generator is roughly 100'. The gas company told me they usually send 7" W.C. of gas to their houses, Will this be ok? And do I need to put a second regulator since I read that the generator will need 3-7 WC? If so can someone tell me which regulator i should get. I know that the outlet is 3/4 on the generator I'm getting.  I will be reducing down the 1.25" pipe to 3/4".
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78buckshot
The pressure should be just fine if in fact the gas company sets it at 7.0 - 7.5 in. w.c. You will not need any other regulator. Run the 1.25" as close as you can to the generator the reduce to 3/4 with a full port ball valve.
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BillM
You will be fine.  Section 5.4.1 Natural Gas Pipe Sizing of the installation manual for 22kw generators allows you to run 130' at 1.25 inches.  I would advise you to not put in any additional regulator which will only complicate things.  The utility is providing you with the correct pressure, and you are well below any limits.  You are golden, leave the rest alone, the water column is perfect.  Good luck, are you self installing?
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Lsu4life47
Ok thanks for the info, that's what I had figured to, just wanted to get second opinions on it. Yeah I'm installing it myself. I did a 20kw at my last house but ran it on LP gas. I've already installed my transfer switch last year.  
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