Primary Circuit Backflow in Solid Fuel / Oil Fired system

[Best]

Seen it done, & it works, providing it's fitted right, but can't see it being allowed.

 

[Gray0689]

Works perfectly and it is allowed

 

[Best]

Works perfectly and it is allowed

I wasn't sure if it was allowed or not, as some info says no valves on primaries, but I suppose this is to stop gate valves etc being fitted by idiots. I just don't like to tell anyone to mess about with the primary circuit if they are not experienced. I have no problem with a flap valve fitted on return, between cylinder, personally, & to be honest, have fitted them.

 

[Gray0689]

No valves allowed that can be shut off like you said gate valves ect

 

[Best]

Thanks Gray, I will feel happier fitting them in future, - if I can buy flap valves easily anymore, as merchants seem not to have them!