Evening,
I'm fitting a straight TRV to my towel rail tomorrow. I need to know which is the flow and return as it says that this valve must be fitted on the flow. How can i identify this other than switching the water back on and flooding the place. Thanks in advance.
I'm fitting a straight TRV to my towel rail tomorrow. I need to know which is the flow and return as it says that this valve must be fitted on the flow. How can i identify this other than switching the water back on and flooding the place. Thanks in advance.