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View the thread, titled "Thermostatic Valve, fit to Flow or Return?" which is posted in UK Plumbers Forums on UK Plumbers Forums.
It depends which valve you have , but most nowadays are bi-directional so it doesn’t matter.
However.
On a vertical rad quite often the direction of flow is critical - it should tell you this , but it doesn’t matter if trv is on flow or return.
However.
On a vertical rad quite often the direction of flow is critical - it should tell you this , but it doesn’t matter if trv is on flow or return.
Recommend to fit on the flow pipe
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Reply to the thread, titled "Thermostatic Valve, fit to Flow or Return?" which is posted in UK Plumbers Forums on Plumbers Forums.
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