I’ve seen yellow PEX pipe coming through an external wall from the meter box outside and then transitions to metallic pipe, then to an automatic shut-off valve (connected to fire alarm panel). Next is the manual shut-off valve.
I have been assured that the installation is compliant with relevant standards.
It bothers me that in the event of a fire alarm in the building, the automatic shut-off will activate downstream of the PEX pipe. It will burn away and gas will continue flowing into the firecell.
- How does this prevent gas fuelling the fire?
- Is there another shut-off valve in the meter box, and if so, why is there another one inside the building?
- As the fire engineer, are we overstepping our responsibility?
For my own peace of mind, could someone provide a schematic showing where the safety devices are and how they operate?