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CSST required at gas applicances
I thought there was a requirement that flexible gas line had to be installed just before a gas appliance to provide some wiggle room during earth quakes. The water heater and attic furnance had CSST installed but the exterior gas pack was missing the CSST. I could not find any mention in Code Check. Don't have complete mechanical codes.
I seem to remember a discussion about the unfitness of CSST for exterior use in this application but could not find the discussion.
Is CSST or similar material required before gas applicances? Any code references?
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