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Old 09-05-2012, 01:46 AM   #1
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Default What size flex hose for natural gas banjos????

Hello,

I just got natural gas ran from my basement out to my garage for my brew stand. I have 1/2 pipe on the brew stand with 3 banjo burners. The pipe coming in from the source is 1/2 as well. However, when I hooked it up the pressure was a little low. Could the size of my flex hose be the problem. Currently have a 1/2 inch on there. Would 5/8 solve this problem???

Thanks,
Mike

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Old 09-05-2012, 03:43 PM   #2
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You may need a larger than 1/2" feed pipe from the source to be able to run all 3 burners. I believe 1/2" may only be adequate to run 1 burner at a time, but I will let others with more experience chime in.

I am also exploring using NG instead of propane, and from the discussions I've had, it seems like your lines may be undersized for a full 3 burner setup, if you plan on running more than 1 at a time.

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Old 09-05-2012, 04:04 PM   #3
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Right, 1/2" bip might not be large enough depending on how far of a run, how many elbows, etc., for your btu draw. There's guides online that help with sizing, I think engineering toolbox is one. If it's the pipe that isn't large enough, going to a larger diameter hose isn't going to make much difference.

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Old 09-05-2012, 08:31 PM   #4
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I'd be ripping a strip off the installer: if you informed him what you intended to use it for, and he just threw in 1/2" without even bothering to consult a sizing table.

Out of curiosity how many BTUs is each burner? Are they originally NG burners or were they propane burners that you purchased new orifices for?

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Old 09-05-2012, 08:49 PM   #5
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They are propane banjos with a natural gas conversion valve from Williams brewing. Not sure how many btus they are. The flame isn't that bad but I could tell they aren't as powerful as my stand alone lp banjo burner.

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Old 09-05-2012, 08:58 PM   #6
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That's understandable, NG provides less BTUs per cubic foot than propane, and it is also at house pressure (typically 7-14" WC (1/4 PSI)) whereas most of the propane burners run at far higher pressures.

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