Originally Posted By: roconnor
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It is very common to run galvanized steel pipe from a meter/riser through an outside wall of a building and then connect to black-iron steel pipe run inside. Where there is an outdoor fixture (such as a BBQ), the black-iron is connected to galvanized pipe before running outside.
I understand the direct connection of galvanized steel and black-iron steel pipe inside a building is acceptable, and have not heard of any problems with that or seen any significant corrosion at these connections on older installations.
That galvanized tee fitting does stick out like a sore thumb though ... I guess the plumber ran out of black-iron tee fittings ... ![icon_rolleyes.gif](upload://iqxt7ABYC2TEBomNkCmZARIrQr6.gif) ... I would think there should also be a drip leg there, even if there is a lower fixture/unit which has a drip leg. Looks like the lower pipe runs upward, in which case there should be a drip leg at the bottom of those fittings.
Darren ... you might be thinking of Cast Iron which is not permitted for gas piping. Otherwise what gas piping material would be used exposed outside?
Just my opinion and 2-nickels ...
Robert O'Connor, PE
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I am absolutely amazed sometimes by how much thought goes into doing things wrong