Re: Gas Line Sizing

Posted by HJ on March 23, 2004 at 08:22:14:
In response to Re: Gas Line Sizing
To calculate the size correctly, you have to use the distance from the gas meter to the water heater and then see what size is recommended for 199,000 btu. I think you will wind up with a recommendation of 1" piping. : I'm replacing my hot water heater with a tankless type. The tankless type requires 3/4" npt gas pipe size. My existing gas line is 1/2" teed from a 1" line roughly 20' from my gas meter. The unit is only 190,000 BTU max. Can I survive with the 1/2" gas line? Or, can I keep the tee and increase from the 1/2" to 3/4"?

Posted by HJ on March 23, 2004 at 08:22:14:

In response to Re: Gas Line Sizing

To calculate the size correctly, you have to use the distance from the gas meter to the water heater and then see what size is recommended for 199,000 btu. I think you will wind up with a recommendation of 1" piping.

: I'm replacing my hot water heater with a tankless type. The tankless type requires 3/4" npt gas pipe size. My existing gas line is 1/2" teed from a 1" line roughly 20' from my gas meter. The unit is only 190,000 BTU max. Can I survive with the 1/2" gas line? Or, can I keep the tee and increase from the 1/2" to 3/4"?

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