John Patrick
I am installing an Eaton (generac) EGN17-01, Model 0059221 generator. The generator will be a little over 10ft away from my propane supply tanks which are a 250 gallon and a 500 gallon hooked to a single high pressure Cavagna Kosan regulator rated at 1M BTU demand. The length line run from the tank's high pressure regulator to the secondary regulator would be about 7 ft. and above ground. The length of the run from secondary regulator to generator would be about 11 ft and would run underground about 8 ft.

I understand that for the demanded BTUs and lengths of line that something like 1/2" ID L flexible copper would be quite sufficient for either or both line sections (protected by PVC for in ground section).

My concern is that I have seen discussions of the "surge" of propane needed by the generator when starting. Such discussions indicate that they use large enough and long enough length of supply tubing to provide a reservoir of propane which can buffer the instantaneous demand while generator is starting. For this generac 17kw propane generator, do I need to be concerned about starting surge demand, if so should I be providing a certain volume of line (10 psi line and/or 11 water inch line) as a surge reserve ?

Thanks
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Birken Vogt
It should be just fine with that setup except 1/2" for the last section might be on the small side. Otherwise nothing to worry about.
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John Patrick
Yes, I see that the 11" line should probably be at least 3/4" ID. Thanks.
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78buckshot
Don't skimp on the secondary pipe size, 3/4" csst is restrictive, poly pipe less so but I would go with 1" with whatever your using.
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