Gas Pipe size

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Old 01-30-09, 08:58 PM
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Gas Pipe size

I need to run a line from the meter for a new boiler. The run is about 30' long. I am trying to figure out what size pipe i need but there are a few unknowns i need some estimates on. The known is the boiler at 105 CFH. At some point i will extend the line to the garage for another heater maybe another 50CFH. The other two appliances that i want to install at some point would be a grill and a dryer. Any idea how many CFH they maybe? If i had a guess i think 1" pipe should be sufficient for this short run but i am looking for a sanity check.
 
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Old 01-30-09, 10:53 PM
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You need to know the maximum distance from the meter to the farthest fixture.
I do not have my gas book in front of me, so I am not sure of the approx btu ratings required for the future items.
You also need to know if you are using LP gas or Natural Gas. They run at different pressures and will affect the pipe sizing.

I HIGHLY RECOMMEND LP OR NAT GAS PIPING BE INSTALLED BY A LICENSED QUALIFIED INSTALLER.

They will have the proper testing equipment and knowledge.
If you install this piping with no permits or inspections, you will be 100% liable should anything go wrong. Your homeowners insurance will be void.

Please be safe !!!
 
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Old 01-31-09, 12:49 AM
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@ 30' 1 inch copper or steel pipe would work but how much further will the pipe need to run? the grill is approximately 30k btu's, the dryer will be about 40k btu's.
 
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Old 01-31-09, 03:29 AM
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Hi Dan, Is that sized for nat or lp gas?
 
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Old 01-31-09, 11:45 AM
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natural... but sizing for natural will give you plenty if they go lp
 
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Old 01-31-09, 02:07 PM
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Originally Posted by plumbermandan View Post
@ 30' 1 inch copper or steel pipe would work but how much further will the pipe need to run? the grill is approximately 30k btu's, the dryer will be about 40k btu's.
THe grill and the dryer are close maybe another 10'. THe Garage heat is much longer ~75' from the boiler.

It is Natural Gas. Yes i have a permit and it will be inspected.
 
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Old 01-31-09, 02:44 PM
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Gas Line

sparky67: Since we are guessing about the hook-up, are you sure the meter will handle the whole load?

"When all else fails, read the directions"
 
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Old 02-06-09, 09:04 PM
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Hmm, Maybe not. The paper work says max load of 175 CFH i will have to check the meter to see exactly what they put in. It will probably be okay for now. I don't expect to do the dryer till the electric one dies. Also i don't see using the grill and garage heat at the same time.
 
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Old 02-08-09, 12:46 AM
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Originally Posted by shacko View Post
sparky67: Since we are guessing about the hook-up, are you sure the meter will handle the whole load?

"When all else fails, read the directions"
never had to worry about a meter not handling the load since the gas company deals with the meter. if it is to small they will come out and replace for free.. in my area that is
 
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