Working on gas pipes

[greenelephant15]

Hello everyone

I would just like to ask you a question please

Are there any special check valves that can be used on gas pipes going into a gas appliance , eg gas cooker, fireplace etc or any similar valves that can be used to ensure the flow of gas goes in one direction and to safeguard any gas appliance from damage?

thanks
greenelephant15

 

[migoplumber]

not that i am aware of on domestic instalations. why would the gas flow back to front ?

 

[Blackcatgas]

Protect the apliance from what sort of damage?.