TRV on flow or return - is it important?

[Rockatansky]

I've realised that some of the trv's in the house are fitted on the return side of the radiator. Some, most I think, are on the flow side - which I think is the 'correct' way to do it.

My question is; is it worth the effort to move the valves over to the other side or will I just be exposing myself to potential plumbing mishaps for no great reason?

If it makes any difference, the trv bodies are not one way and the heads are all Tado units.

[finlo]

Some makes can go either side others have a directional arrow that can still go either side but their orientation differs.

Edited by finlo on Saturday 15th November 09:38

[Rockatansky]

finlo said:

Some makes can go either side others have a directional arrow that can still go either side but there orientation differs.

Thanks.

They're the type that are bidirectional so that in itself isn't an issue, it's just whether it'll make any difference to the efficiency of the operation I guess.

[GasEngineer]

Rockatansky said:

Thanks.

They're the type that are bidirectional so that in itself isn't an issue, it's just whether it'll make any difference to the efficiency of the operation I guess.

If they are bi-directional no difference to efficiency. When they close, the flow will be stopped whichever end they are on.

Early one directional TRVs were sensitive to flow direction, often leading to water hammer noise when installed on the wrong end.

Do you know what make the TRVs are?

[Rockatansky]

Thanks for that.

I don't know what make the valve bodies are. The house is a two year old new build so I imagine they'll be whatever was cheaper in bulk for the builder! They are marked with a bidirectional arrow.

I've replaced all the heads with Tado ones.