Flow and Return of each radiator...

[tvradict]

I'm currently replacing the maze of spaghetti pipework that fed my radiators. I've already stripped out the old st, but stupidly, forgot to note the 'in' and 'out' of each of the rads.

My rads all have thermostatic valves and I'm almost certain I read somewhere that the thermostatic valves should be on the 'out' pipe.

How do I work this out, is it as simple as the thermo valves are on the return side or is it more complex than that?

TIA
Stuart

[tvradict]

Thanks for the replies.

Unfortunately since I posted my question I had to take the a rad off the wall to get access to the valves and pipework, twas a bit tight you see, and discovered the TRV on this rad is an innie, whereas the TRV on the rad I changed yesterday (had a spare, and the one that was there was st) was an outtie.

I can see this job is gonna be a bh.

cheers

[tvradict]

Cheers

But I need a Miracle more than luck