Radiator Flow & Return Pipes

[Centurion1]

Hi there,

How can you tell which is the flow and which is the return pipe on a radiator?

Regards

Ian

 

[stevetheplumber]

turn on heating from cold and the flow gets hot first or you have to trace the pipework back

 

[fuzzy]

trv should be on flow, L/S should be on return, not a garentee though