Search results

the heating system is a closed loop. the flow is made by a pump. If you are turning the valve off and you still have flow you might as well just snatch the pipe and cap it off and get a new TRV. For what you are trying to achieve just close/cap the flow. undo the nut and drain the rad. Using a...

the return doesn't move if it isn't connected to the flow. you can cut the return pipe and the water will just sit.

You don't need to shut off both sides as one is flow, the other is return. when turning the TRV valve off you should have no water unless the heating is running. Either the system is running or the valve isn't shutting properly.