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Old 11-08-2009, 02:43 PM   #1
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Can I go up from 3/4" metal gas pipe to a 1" and then back down?


Hi,

I have a 17' of 1" metal pipe that I would like to use, but my outlet on the meter is 3/4". It is a 17' straight piece that I would like to use instead f getting a new one. Question, can I go 3' up my wall with a 3/4" pipe, then connet a 90 degree to the 1" pipe for the 17' and then do another 90 degree and a 5' piece of 3/4" to feed a 300,000 btu water heater? Thanks.

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Old 11-08-2009, 04:07 PM   #2
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Can I go up from 3/4" metal gas pipe to a 1" and then back down?


Holy crap... why do you need a 300,000BTU water heater

Is this the only appliance on the 3/4" gas line

No furnace or stove

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Old 11-08-2009, 10:44 PM   #3
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Can I go up from 3/4" metal gas pipe to a 1" and then back down?


Quote:
Originally Posted by Plumber101 View Post
Holy crap... why do you need a 300,000BTU water heater

Is this the only appliance on the 3/4" gas line

No furnace or stove

Yes, I have a noritz 930 tankless and its 300K. I have a 3/4" pipe handoff from the meter, I wanted to run 3' up of 3/4" then bend 90 degrees and go into a 1" for 17' into my laundry, then do another 90 degree bend and go into 3/4" for another 5', thats where the heater is at.
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Old 11-09-2009, 09:47 AM   #4
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Can I go up from 3/4" metal gas pipe to a 1" and then back down?


new topic started Do I need a gas meter/service upgrade? DIY water heater project please help.
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