Flexible copper 1/2" gas line to water heater -- how big an issue?

[Patrick Bolliger]

From the National Fuel Gas Code:

5.6.2.3 Copper and Brass. Copper and brass pipe shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 scf of gas (0.7 mg/100 L).

So as I read this copper is allowed BUT not if your gas supply contains more then 0.3 grains of hydrogen sulfide per 100 scf of gas .


5.6.2.4 Threaded Copper , Brass and Aluminum.
Threaded copper ,brass or Aluminum alloy pipe shall not be used with gases corrosive to such material.

I think Type K or L are the type of copper piping that can be used with natural gas.

Don't see it that often around here.

also
The (Uncoated brass flexible connectors) are the topic of recall and explosion warnings/ notices (old types without any coatings). They fall apart /disconnect at the fitting end.

http://www.pecorp.com/residential/re...ible_connector