Had a question about when it is acceptable to use flexible gas piping and when it is not. One of my co-workers came across a commercial rooftop unit approximately 150,000 btuh on a job that was hard piped in 3/4 up to the gas-cock and then run in flex 3/4 to the gas valve (approximately 3 ft) and he wanted to know if it was up to code. Any suggestions or versions of the codes books to refer to?
↧