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LP gas pipe under topping?

Question asked by luzunaris on Sep 17, 2019

LP gas pipe under topping.


I am inspecting a construction of a residence,. The drawings ask for LP gas piping to be installed 3 feet below Finish floor , for the kitchen, dryer and a BBQ. The contractor want to install it in a 3" topping. Can he do that?. I understand that NFPA 58 prohibit that type of construction.