Originally Posted by modarch
Not to hijack- but what grade copper is required for propane? What symbols or text would be on the pipe at the local home improvement centers?
From what I can find is you can use Grade L which will be stamped. You can also use ACR grade tubing which is color coded "Blue" or Grade K as last choice.
Recommendation: Fuel Oil, L.P. and Natural Gas Services—Use Type L or Type ACR tube with flared joints in accessible locations and brazed joints made using AWS A5.8 BAg series brazing filler metals in concealed locations.