I don't know if the same person did the underground gas line but I'll detail the normal sequence of events: Dig trench and install u/g line complete but still exposed so that inspector can verify minimum 18" burial depth. The heater could be installed at the same time so that the inspector only needs one trip out but the line should not be tied in at the house/meter or the final connection to the heater during this pressure test. The swing joint by the meter tie-in can be prepared so that its configuration will be obvious, the swing joint from the line exiting the ground into the garage could have been completed though as it would be part of the line being tested.
I don't use those yellow appliance connectors save for putting in a gas range in a residential kitchen. They're not acceptable for use with infra-red heaters due to those heaters movement from expansion and contraction (they require a special hose and in a specific configuration/shape) but for a properly suspended unit heater they should be OK? To be honest I'm a little rusty on that aspect, I simply default that I don't use them as I always hard pipe them with steel
Quote:
Originally Posted by CNP
The flex hose is fine. There is no sediment trap and no shutoff at the appliance.
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I agree the shut off is required, but a drip leg isn't necessary on a line that is uphill all the way to the appliance as oil and debris from threading the pipe could not possibly defy gravity to get up there.